Rabbit Fox LP3500 User Manual

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Fox (LP3500)

C-Programmable Single -Board Compu ter

User’s Manual

019–0111 • 081121–L

Fox (LP3500) User’s Manual

Part Number 019-0111 • 081121–L • Printed in U.S.A.

No part of the contents of this manual may be reproduced or transmitted in any form or by any means without the express written permission of Digi International.

Permission is granted to make one or more copies as long as the copyright page contained therein is included. These copies of the manuals may not be let or sold for any reason without the express written permission of Digi International.

Digi International reserves the right to make changes and

improvements to its products without providing n otice.

T r ade mark s

Rabbit and Dynamic C are registered trademarks of Digi International Inc.

Rabbit 2000 and RabbitCore are trademarks of Digi International Inc.

The latest revision of this manual is available on the Rabbit Web site, www.rabbit.com, for free, unregistered download.

Digi International Inc.

www.rabbit.com

Fox (LP3500)

Chapter 1. Introduction 1

1.1 LP3500 Description..............................................................................................................................1

1.2 LP3500 Features...................................................................................................................................2

1.3 Optional Add-Ons.................................................................................................................................3

1.4 Development and Evaluation Tools......................................................................................................4

1.4.1 Tool Kit.........................................................................................................................................4

1.4.2 Software........................................................................................................................................5

1.5 CE Compliance.....................................................................................................................................6

1.5.1 Design Guidelines.........................................................................................................................7

1.5.2 Interfacing the LP3500 to Other Devices .....................................................................................7

Chapter 2. Getting Started 9

2.1 LP3500 Connections.............................................................................................................................9

2.2 Remove Battery Tab...........................................................................................................................13

2.3 Installing Dynamic C..........................................................................................................................14

2.4 Starting Dynamic C ............................................................................................................................14

2.5 PONG.C..............................................................................................................................................15

2.6 Where Do I Go From Here? ...............................................................................................................15

Chapter 3. Subsystems 17

3.1 LP3500 Pinouts...................................................................................................................................18

3.1.1 Headers and Screw Terminals.....................................................................................................18

3.2 Power Modes ......................................................................................................................................19

3.2.1 Setting the Power-Save Mode.....................................................................................................20

3.2.2 Operating in the Power-Save Mode............................................................................................21

3.2.3 Resuming Normal-Power or Low-Power Operation ..................................................................21

3.3 Digital I/O...........................................................................................................................................22

3.3.1 Digital Inputs...............................................................................................................................22

3.3.2 Digital Outputs............................................................................................................................23

3.4 Serial Communication ........................................................................................................................25

3.4.1 RS-232 ........................................................................................................................................26

3.4.2 RS-485 ........................................................................................................................................26

3.4.3 Serial Interface Port ....................................................................................................................28

3.4.4 Programming Port.......................................................................................................................28

3.5 Display Interface.................................................................................................................................30

3.6 A/D Converter Inputs (LP3500 only) .................................................................................................31

3.7 PWM Outputs.....................................................................................................................................33

3.8 Relay Output Circuit (LP3500 only) ..................................................................................................34

3.9 Serial Programming Cable..................................................................................................................35

3.9.1 Changing Between Program Mode and Run Mode ....................................................................35

3.9.2 Standalone Operation of the LP3500..........................................................................................36

3.10 Other Hardware.................................................................................................................................36

3.10.1 Spectrum Spreader....................................................................................................................36

3.11 Memory.............................................................................................................................................37

3.11.1 SRAM .......................................................................................................................................37

3.11.2 Flash Memory...........................................................................................................................37

User’s Manual

Chapter 4. Software 39

4.1 Upgrading Dynamic C ....................................................................................................................... 41

4.1.1 Patches and Bug Fixes................................................................................................................ 41

4.1.2 Extras.......................................................................................................................................... 41

4.2 Sample Programs................................................................................................................................42

4.2.1 Power Modes..............................................................................................................................42

4.2.2 Digital I/O...................................................................................................................................42

4.2.3 Serial Communication................................................................................................................ 43

4.2.4 A/D Converter Inputs.................................................................................................................43

4.2.5 PWM Outputs............................................................................................................................. 44

4.2.6 Relay Output...............................................................................................................................44

4.2.7 Vcc Monitoring .......................................................................................................................... 44

4.2.8 LP3500 Calibration .................................................................................................................... 44

4.2.9 LCD/Keypad Module Sample Programs....................................................................................45

4.3 LP3500 Libraries................................................................................................................................46

4.4 LP3500 Function Calls....................................................................................................................... 47

4.4.1 LP3500 Power Modes................................................................................................................ 47

4.4.2 Board Initialization..................................................................................................................... 51

4.4.3 Digital I/O...................................................................................................................................52

4.4.4 Serial Communication................................................................................................................ 54

4.4.5 A/D Converter Inputs.................................................................................................................56

4.4.6 Vcc Monitoring (LP3500 only)..................................................................................................68

4.4.7 PWM Outputs............................................................................................................................. 69

4.5 Relay Output (LP3500 only) ..............................................................................................................70

Appendix A. LP3500 Specifications 71

A.1 Electrical and Mechanical Characteristics ........................................................................................72

A.1.1 Exclusion Zone..........................................................................................................................75

A.1.2 Headers...................................................................................................................................... 76

A.2 Conformal Coating............................................................................................................................77

A.3 Jumper Configurations......................................................................................................................78

A.4 Use of Rabbit 3000 Parallel Ports..................................................................................................... 81

Appendix B. Prototyping Board 85

B.1 Mechanical Dimensions and Layout................................................................................................. 86

B.2 Using the Prototyping Board............................................................................................................. 87

B.2.1 Interface to LP3500 ................................................................................................................... 87

B.2.2 Demonstration Board................................................................................................................. 88

B.2.3 Prototyping Area........................................................................................................................ 88

Appendix C. LCD/Keypad Module 89

C.1 Specifications.....................................................................................................................................89

C.2 Contrast Adjustment..........................................................................................................................91

C.3 Keypad Labeling................................................................................................................................92

C.4 Header Pinouts...................................................................................................................................93

C.4.1 I/O Address Assignments.......................................................................................................... 93

C.5 Bezel-Mount Installation................................................................................................................... 94

C.6 Connect the LCD/Keypad Module to Your LP3500......................................................................... 96

C.7 LCD/Keypad Module Function Calls................................................................................................97

C.7.1 LEDs.......................................................................................................................................... 97

C.7.2 LCD Display..............................................................................................................................98

C.7.3 Keypad.....................................................................................................................................115

C.8 Sample Programs............................................................................................................................. 118

Appendix D. Plastic Enclosure 119

D.1 Assembly Instructions..................................................................................................................... 120

D.2 Dimensions......................................................................................................................................1 22

Fox (LP3500)

Appendix E. Power Management 123

E.1 External Power Supply .....................................................................................................................123

E.2 Batteries and External Battery Connections.....................................................................................125

E.2.1 Replacing the Backup Battery..................................................................................................126

E.2.2 Power to VRAM Switch...........................................................................................................126

E.2.3 Reset Generator........................................................................................................................127

E.3 Chip Select Circuit ...........................................................................................................................127

Appendix F. Running a Sample Program 129

Index 131

Schematics 135

User’s Manual

Fox (LP3500)

1. INTRODUCTION

The LP3500 is a low-po we r sin gle -bo ar d co mp uter wi th bui lt-i n analog and digital I/O. Although the LP3500 was designed specifically for low-power applications and data logging, it has a host of features that make it attractive for other applicat ions as well. Low power is often required in portable equipment operating from batteries or from solar pow er. The LP3500 is ideal for monitoring equipment o r processes that are far-removed from a power supply, remote telemetry (RTUs), pipeline control and monitoring, well-head monitoring; and use on mobile equipment such as refrigeration trucks.

An optional plasti c enclosure a nd an

LCD/keypad module are available.

The Tool Kit has the essentials that you need to design your own low-power microprocessor-based system, and includes a complete Dynamic C software development system.

1.1 LP3500 Description

The LP3500 is a low-power single-board computer that incorporates the powerful and low-EMI Rabbit 3000 microprocessor, flash memory, static RAM, digital I/O ports, A/D converter inputs, PWM outputs, RS-232/RS-485 serial ports, and both parallel and serial interfaces that allow other devices to be connected to the LP3500.

All aspects of the LP3500 are designed for low power consumption and operates at a variety of power levels, including a power-save mode, to fit customer-specified conditions at any given time. The CPU runs at a nominal speed of 7.4 MHz, and operates at 2.8 V to conserve power. The LP3500 consumes less than 20 mA when fully operational, and less than 100 µA when in the power-save mode. A replaceable coin-type battery will allow the LP3500 to operate in sleep mode for over 3 years. The LP3500 is normally powered from an external battery or power supply. When the unit is in the power-save mode, it can be awakened by an internal timer, an RS-232 signal, or via polling of an external input. The LP3500 can be switched from the power-save mode to full operation and back under program control. In addition, various sections of circuitry (such as the RS-232 ports) can be switched off under program control to further conserve power when not in use.

User’s Manual 1

1.2 LP3500 Features

• Rabbit 3000® microprocessor operating at up to 7.4 MHz.

• 512K/128K static RAM and 512K/256K flash memory options.

• 26 digital I/O: 16 protected digital inputs and 10 high-current digital outputs provide

sinking and sourcing outputs.

• 8 single-ended or 4 differential analog chann els with Vcc monitoring option: 1 1 -bit singleended or 12-bit differential chan nels.

• 3 PWM outputs.

• Six serial ports

1 RS-485 3 RS-232 (one 5-wire and one 3-wire or three 3-wire), jumper option for logic-level

outputs; Serial Port E has a “listen” and “wake-up” capability 1 logic-level serial interface for optional add-ons 1 asynchronous clocked serial port dedicated for programming

• Battery-backed real-time clock.

• Watchdog supervisor.

Two LP3500 models are available. Their standard features are summarized in Table 1.

Table 1. LP3500 Models

Feature LP3500 LP3510

Microprocessor Rabbit 3000 running at 7.4 MHz Stati c RAM 512K 128K Flash Memory 512K 256K A/D Converter Inputs

(ranges from 0–1 V DC to 0–20 V DC, 4 channels may be individually configured for 4–20 mA)

C-form Bistable Rel a y Yes No

Yes No

Appendix A provides detailed specifications. The LP3500 can be mounted in two ways. It can be mounted to a panel or on a plastic-

enclosure base, which allows I/O connections to be made using traditional connectors with

0.1" spacing. The LP3500 can also be inverted and mounted directly to mating connectors on a motherboard of the customer's design. The first approach is appropriate where I/O connections go directly to devices and switches. The second approach is appropriate where additional circuitry is incorporated on the motherboard.

2 Fox (LP3500)

1.3 Optional Add-Ons

• Plastic enclosure (can be wall-mounted or panel-mounted), which consists of a base and a cover for either the LP3500 by itself or an assembly made up of the LP3500 and the LP3500 Prototyping Board. The base is also available separately.

• The Prototyping Board included with the T o ol Kit is a convenient means of interfacing to the LP3500 via the screw-terminal headers on the Prototyping Board. The Prototyping Board is also available for separate purchase.

• 4M and 8M SF1000 serial flash expansion cards.

• LCD/keypad module with 7-key keypad and seven LEDs.

Further details on the Prototyping Board, the plastic enclosure, and the LCD/keypad module are provided in Appendix B, Appendix C, and Appendix D.

Visit our Web site for up-to-date information about additional add-ons and features as they become available. The Web site also has the latest revision of this user’s man ual and schematics.

User’s Manual 3

1.4 Development and Evaluation Tools

1.4.1 Tool Kit

A T ool Kit contains the hardware essentials you will need to develop applications with the LP3500 single-board computer. The items in the Tool Kit and their use are as follows.

• LP3500 Getting Started instructions.

• Dynamic C CD-ROM, with complete product documentation on disk.

• Programming cable, used to connect your PC serial port to the LP3500.

• Universal AC adapter, 12 V DC, 1 A (includes Canada/Japan/U.S., Australia/N.Z.,

U.K., and European style plugs). 3 to 30 V DC

• Prototyping Board with pushbutton switches, LEDs, and screw-terminal headers. The Prototyping Board can be hooked up to the LP3500 to demonstrate the I/O capabilities of the LP3500 and to provide a prototyping area for you to develop your own add-on circuits. The screw-terminal headers extend the LP3500’ s headers for development, and can also be used in a production environment.

• Plastic enclosure with four screws.

• Four standoffs with mounting screws.

If you are using another power supply, it must provide

• Screwdriver.

• Rabbit 3000 Processor Easy Reference poster.

• Registration card.

Programming

DIAG

PROG

Fox (LP3500)

The LP3500 is a low-power single-board computer designed to operate reliably virtually any place it is deployed, especially where power is limited. These Getting Started instructions included with the Tool Kit will help you get your LP3500 up and running so that you can run the sample programs to explore its capabilities and develop your own applications.

Tool Kit Contents

The LP3500 Tool Kit contains the following items:

• Dynamic C CD-ROM, with complete product documentation on disk.

• Programming cable, used to connect your PC serial port to the LP3500.

• Universal AC adapter, 12 V DC, 1 A (includes Canada/Japan/U.S., Australia/N.Z., U.K., and

European style plugs).

• Prototyping Board with pushbutton switches, LEDs, and screw-terminal headers. The Prototyping

Board can be hooked up to the LP3500 to demonstrate the I/O capabilities of the LP3500 and to provide a prototyping area for you to develop your own add-on circuits.

• Plastic enclosure with four screws.

• Four standoffs with mounting screws.

• Screwdriver.

•

Getting Started instructions.

• Rabbit 3000 Processor Easy Reference poster.

• Registration card.

Visit our online Rabbit store at www.rabbit.com/store/ for the latest information on peripherals and accessories that are available for the LP3500 single-board computers.

Step 1 — Install Dynamic C

Before doing any development, you must install Dynamic C. Insert the CD from the Development Kit in your PC’s CD-ROM drive. If the installation does not auto-start, run the setup.exe program in the root directory of the Dynamic C CD. Install any Dynamic C modules after you install Dynamic C

Rabbit and Dynamic C are registered trademarks of Digi International Inc.

Getting Started

Instructions

Cable

(101-0513)

I N 1 2

N 1 1

N 1 0

I N 0

8 G N D

N 0 7

I N 0

N 0 4 I

N 0 3

I N

0 2

I N 0

J 1

I N 0

J41

G N D

3 V VBAT

GND RxE TxE GND RxC TxC GND RxB TxB GND + 485  GND +K OUT9 OUT8 OUT7 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0

Prototyping Board

J23

N 1 5 I N

1 4

I N 1 3

V I N

J 1 2

J22

J 1 1

G N D

GND

VIN

J42

Stand-Offs

and Screws

GND VIN GND VBAT EXT GND PWM2 PWM1 PWM0 GND AIN7 AIN6 AIN5 AIN4 AIN3 AIN2 AIN1 AIN0 GND

J21

VIN

GND

VIN

GND

J44

J43

Universal

AC Adapter

RN1

I N

1 S D

2 S D

3 S

4 S D

R W P

Screwdriver

with Plugs

Plastic Enclosure

Figure 1. LP3500 Tool Kit

4 Fox (LP3500)

1.4.2 Software

The LP3500 is programmed using version 7.26P or later of Rabbit’s Dynamic C. A com-

patible version is inclu ded o n the Tool Kit CD-ROM.

Library functions provide an easy-to-use interface for the LP3500. Software drivers for digital and analog I/O, and for serial communication are included with Dynamic C. Web-based technical support is included at no extra charge.

Starting with Dynamic C version 9.60, Dynamic C includes the popular µC/OS-II realtime operating system, point-to-point protocol (PPP), FAT file system, RabbitWeb, and other select libraries. Rabbit also offers for purchase the Rabbit Embedded Security Pack featuring the Secure Sockets Layer (SSL) and a specific Advanced Encryption Standard (AES) library.

In addition to the Web-based technical support included at no extra charge, a one-year telephone-based technical support subscription is also available for purchase.

V isit o ur Web site at www.rabbit.com for further information and complete documentation.

User’s Manual 5

1.5 CE Compliance

Equipment is generally divided into two classes.

CLASS A CLASS B

Digital equipment meant for light industrial use Digital equipment meant for home use Less restrictive emissions requirement:

less than 40 dB µV/m at 10 m (40 dB relative to 1 µV/m) or 300 µV/m

More restrictive emissions requirement: 30 dB µV/m at 10 m o r 100 µ V/m

These limits apply over the range of 30–230 MHz. The limits are 7 dB higher for frequencies above 230 MHz. Although the test range goes to 1 GHz, the emissions from Rabbit-based systems at frequencies above 300 MHz are generally well below background noise levels.

The LP3500 has been tested and was found to be in conformity with the following applicable immunity and emission standards. The LP3510 is also CE qualified as it is a sub-version of the LP3500. Boards that are CE-compliant have the CE mark.

NOTE: Earlier versions of the LP3500 sold before 2003 that do not

have the CE mark are not CE-complaint.

Immunity

The LP3500 series of single-board computers meets the following EN55024/1998 immunity standards.

• EN61000-4-3 (Radiated Immunity)

• EN61000-4-4 (EFT)

• EN61000-4-6 (Conducted Immunity)

Additional shielding or filtering may be required for a heavy industrial environment.

Emissions

The LP3500 series of single-board computers meets the following emission standards emission standards with the Rabbit 3000 spectrum spreader turned on and set to the normal mode.

• EN55022:1998 Class B

• FCC Part 15 Class B

Your results may vary, depending on your application, so additional shielding or filtering may be needed to maintain the Class B emission qualification.

6 Fox (LP3500)

1.5.1 Design Guidelines

Note the following requirements for incorporating the LP3500 series of single-board computers into your application to comply with CE requirements.

General

• The power supply provided with the T ool Kit is for development purposes only. It is the

customer’s responsibility to provide a CE-compliant power supply for the end-product application.

• When connecting the LP3500 to outdoor cables, the customer is responsible for provid-

ing CE-approved surge/lightning protection.

• Rabbit recommends placing digital I/O or analog cables that are 3 m or longer in a

metal conduit to assist in maintaining CE compliance and to conform to good cable design practices. Rabbit also recommends using properly shielded I/O cables in noisy electromagnetic environments.

Safety

• For personal safety, all inputs and outputs to and from the LP3500 must not be con-

nected to voltages exceeding SELV levels (42.4 V AC peak, or 60 V DC). Damage to the Rabbit 3000 microprocessor may result if voltages outside the design range of 0 V to 40 V DC are applied directly to any of its digital inputs.

• The lithium backup battery circuit on the LP3500 has been designed to protect the bat-

tery from hazardous conditions such as reverse charging and excessive current flows. Do not disable the safety features of the design.

1.5.2 Interfacing the LP3500 to Other Devices

There are two versions of the LCD/keypad module that may be used with the LP3500: without a bezel (Part No. 101-0601), and a remote panel-mounted version with bezel (Part No. 101-0541). The cable used to connect the LCD/keypad module should be less than 30 cm (12") to maintain CE compliance. Appendix C provides complete information for mounting and using the LCD/keypad module.

Since the LP3500 series of single-board computers is designed to be connected to other devices, good EMC practices should be followed to ensure compliance. CE compliance is ultimately the responsibility of the integrator. Additional information, tips, and technical assistance are available from your authorized Rabbit distributor, and are also available on our Web site at www.rabbit.com.

User’s Manual 7

8 Fox (LP3500)

2. GETTING S TARTED

Chapter 2 explains how to connect the programming cable and power supply to the LP3500.

2.1 LP3500 Connections

1. Use the 4-40 screws supplied with the Tool Kit to attach the metal standoffs to your

LP3500 series board as shown in Figure 2.

OUT

IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07

RN2

C15

C12

C20

RN1

AIN0 AIN1 AIN2 AIN3

D11

D13

R23

Q22

R30

C24

C10 C13

R13

R16

R18

R17

C26

C33

R29

R20

R25

C37

R26

R22

PWM0

GND

IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15

AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND

OUT9

OUT8

OUT7

D19

C16

C36

C19

D18

D15 D17

RP17

Battery

R57

R31

C22

C29

C43

BT1

C44

C50

R32

C40

D22

PWM

PWM2

VBAT

GND VIN GND

EXT

+K GND  485 + GND TxB RxB GND TxC RxC GND TxE RxE GND

D20

D26

R37

D25

R42

D21

C48

R34

R40 C54

R36

R43

R33

R38

C53

C51

R41

R39

R44

C55

R45

C59

R48

C60

U10

RP13

RESET

R50

R49

PROGRAM

PORT

OUT0

OUT2

OUT5

OUT4

OUT3

OUT6

D28

Q10

C61

Q12

R47

U11

C66

RP14

GND

RELAY

D30

D34

Q17

Q16

Q13

D32

C67

U12

D33Q14

C64

U13

C70

R51

R58

C65

Q20

R54

GND

COM

R56

R55

DISPLAY

Figure 2. Attach Stand-Offs and Remove Battery Cap

User’s Manual 9

2. Attach the LP3500 main board to the Prototyping Board as shown in Figure 3. Press the pins from the headers on the bottom side of the LP3500 board firmly into the

corresponding header sockets located at J1, J2, and J4 on the Prototyping Board.

NOTE: It is important that you line up the header pins on the LP3500 exactly with the

corresponding pins may become bent or damaged if the pin alignment is offset, and the LP3500 will not work. Permanent electrical damage may also result if a misaligned LP3500 is powered up.

header sockets J1, J2, and J4 on the Prototyping Board. The header

PORT

PROGRAM

/RESET

TP2

RESET

6 3

Q19

Q18

R53 R52

R46

Q21

RP11

RP12

Q15

D31

LP3500

R27

C38

R21

R28

R19

2 4

C27

C34

R15

1 0

R14

P 9

C14

RP1

C 7

RP2

C 5

J P 1

RP4

RP3

VCC

R12

GND

R11

R10

07

815

1 8

J P 1

J P

C 4

C17

C23

D12

D10

7 1 1

C30

D16

R P 9

C28

R P

RP10

D14

Q11

C25

J P 4

C 3

D23

R35

D29

D27

D24

J23

IN 1 5 IN

1 3 IN

1 2 IN

1 1

1 0 IN

0 9 IN

0 8

0 7 IN

0 6 IN

0 5 IN

0 4 IN

0 3 IN

0 2 IN

0 1 IN

J 1

0 0 G

J41

N D

3 V VBAT

GND RxE TxE GND RxC TxC GND RxB TxB GND + 485  GND +K OUT9 OUT8 OUT7 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0

GND

VIN

J42

J43

VIN

GND

VIN

GND

J44

GND VIN GND VBAT EXT GND PWM2 PWM1 PWM0 GND AIN7 AIN6 AIN5 AIN4 AIN3 AIN2 AIN1 AIN0 GND

J21

J22

1 S

2 S

3 S D

4 S D

RN1

Prototyping

Board

Figure 3. Attach LP3500 Main Board to Prototyping Board

10 Fox (LP3500)

3. Connect the programming cable to download programs from your PC and to program and debug the LP3500.

NOTE: Use only the programming cable that has a red shrink wrap around the RS-232

level converter (Part No. 101-0513), whic h is supplie d with the LP3500 Tool Kit. Other Rabbit programming cables with clear or blue shrink wrap might not be voltage-compatible or their connector sizes may be different.

Connect the 10-pin PROG connector of the programming cable to header J5 on the LP3500 board. Ensure that the colored edge lines up with pin 1 as shown. There is a small dot on the circuit board next to pin 1 of header J5. (Do not use the DIAG connector, which is used for monitoring only.) Connect the other end of the programming cable to a COM port on your PC. Make a note of the port to which you connect the cable, as Dynamic C will need to have this parameter configured. Note that COM1 on the PC is the default COM port used by Dynamic C.

Header J5 is between the LP3500 and the Prototyping Board

PROGRAM

PORT

PC COM port

Colored edge

Programming

Cable

PROG

1 5

N 1

N 1 3

N 1

N 1 0

N 0

1 2

N 0 7

N 0 6

N 0 5

N 0 3

0 2

IN 0 1

J 1

N 0 0

3 V VBAT

J41

GND RxE TxE GND RxC TxC GND RxB TxB GND + 485  GND +K OUT9 OUT8 OUT7 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0

R15

R14

C14

RP1

RP2

C17

VCC

GND

07

815

J P 1

C23

D12

D10

J P 1

RP4

C30

RP3

D16

C28

R12

D14

R11

R10

C25

J P

R35

C 3

J42

J23

Do not connect

AC adapter to

VBAT terminal

Figure 4. Programming Cable and Power Supply Connections

Red

DIAG

R27

C38

R21

R28

R19

J22

2 4

C27

C34

P 1 0

C 4

C 4 2

J P

R P 9

D23

GND

VIN

J43

D24Q7D27

VIN

GND

RP10

Q11

D29

GND VIN GND VBAT EXT GND PWM2 PWM1 PWM0 GND AIN7 AIN6 AIN5 AIN4 AIN3 AIN2 AIN1 AIN0 GND

/RESET

TP2

J21

RESET

VIN

GND

R46

Q21

RP11

RP12

Q15

D31

J44

PORT

PROGRAM

C 6

Q19

Q18

R53

R52

8 G

1 S

D 2 S

D 3 S

shrink wrap

RN1

Remove slot cover,

insert tab into slot

Assemble

AC Adapter

Snap plug into place

NOTE: Some PCs now come equipped only with a USB port. It may be possible to use an

RS-232/USB converte r (Part No. 20- 151-0178) with t he programming c able supplied wi th the LP3500 Tool Kit. Note that not all RS-232/USB converters work with Dynamic C.

User’s Manual 11

4. Connect the power supply. First, prepare the AC adapter for the country where it will be used by selecting the plug.

The LP3500 Tool Kit presently includes Canada/Japan/U.S., Australia/N.Z., U.K., and European style plugs. Snap in the top of the plug assembly into the slot at the top of the AC adapter as shown in Figure 4, then press down on the spring-loaded clip below the plug assembly to allow the plug assembly to click into place.

Hook up the connector from the wall transformer to header J5 on the Prototyping Board as shown in Figure 4. The orientation of this connector is not important since the VIN (positive) voltage is the middle pin, and GND is available on both ends of the three-pin header J5.

NOTE: Do not connect the AC adapter to the VBAT terminal on the Prototyping Board.

The VBAT terminal supplies th e backu p batt ery vo ltage of 3 V, and the LP3500 may b e damaged if subjected to the raw DC voltage from the AC adapter through the VBAT terminal.

5. Apply power. Plug in the AC adapter. If you are using your own power supply, it must provide 3 V to

30 V DC—voltages outside this range could damage the LP3500.

NOTE: A hardware reset may be done by pressing the RESET switch on the LP3500.

The LP3500 may also be reset by unplugging the AC adapter, then plugging it back in. However, when the LP3500 is operating in the power-save mode, the backup battery will provide su ff icient voltage to prev ent a r eset f rom happeni ng, in which cas e you will have to press the RESET switch on the LP3500.

OUT1

IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15

RN2

C15

C12

D11

C10 C13

RN1

R17

AIN0 AIN1 AIN2 AIN3

AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND

OUT9

OUT8

OUT7

OUT6

+K GND  485 + GND TxB RxB GND TxC RxC GND TxE RxE GND

D19

D20

D26

C36

D18

RP17

R57

Battery

R31

BT1

R29

C37

PWM0

R37

D25

R42

D21

R38

C48

C53

C51

R34

R41

R39

R44

C43

C44

R32

C40

PWM1

C55

R40 C54

R36

C50

D22

VBAT

EXT

GND VIN GND

PWM2

C16

C19

D15 D17

C20

C22

C29

D13

R23

Q22

R30

C24

R13

R16

R18

C26

C33

R20

R25

R26

R22

RESET switch

OUT0

OUT2

OUT5

OUT4

OUT3

GND

RELAY

D30

D28

D34

Q17

Q16

Q10

R43

R33

Q13

D32

C61

Q12

U12

R47

R45

D33Q14

U11

C66

C59

R48

C60

RESET

C64

U13

U10

RP13

C65

R50 R49

RP14

PROGRAM

PORT

COM

R56

R55

C69

C67

C70

R51

R58

Q20

R54

GND

DISPLAY

DPRST

VDISP

GND

OUT0

OUT1

OUT2

OUT3

D31

D29

Q15

Q11

RP12

RP11

C68

GND

R52

R53

Q18

DISP

C63

TP1

Q21

VRAM

R46

RP15

Q19

RESET

TP2

/RESET

PROGRAM

PORT

PROGRAM

PORT

RESET switch

Figure 5. Locations of LP3500 RESET Switches

Reset switches are located on both sides of the LP3500 board.

CTS RTS

C31

JP2

JP1

JP4

815

JP6

JP5

RP8

C28

RP9

JP11

JP7

JP8

JP9

JP10

C34

R24

C38

R27

GND

AIN7

PWM0

07

C25

C18

R10

JP3

R11

D14

R12

D16

RP3

C30

RP4

JP12

D10

D12

C23

C17

C71

IN DR OUT

JP13

C21

C14

R14

R60

R15

420 mA

C27

R19

R21

AIN3

AIN2

AIN6

AIN5

AIN4

AIN3

AIN2

IN00

GND

IN01

VCC

IN02

IN03

IN04

IN05

IN06

IN07

GND

IN08

IN09

IN10

RP2

IN11

RP1

IN12

IN13

IN14

IN15

AIN1

AIN0

AIN1

AIN0

RP10

OUT6

D24Q7D27

OUT7

OUT8

D23

VIN

GND

GND +KGND RxE TxE GND RxC TxC GND RxB TxB GND + 485 

OUT9

C49

R59

C52

VBAT

EXT

GND

PWM2

R35

C39

C42

C41

R28

PWM1

OUT4

OUT5

12 Fox (LP3500)

2.2 Remove Battery Tab

The backup battery on the LP3500 has a plastic tab to protect the battery against discharging before the LP3500 is placed into service.

OUT1

OUT0

OUT2

OUT3

OUT4

GND

COM

IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15

+K GND  485 + GND TxB RxB GND TxC RxC GND TxE RxE GND

OUT9

OUT8

Pull

OUT5

OUT7

OUT6

Plastic

Tab

DISPLAY

AIN0 AIN1 AIN2 AIN3

PWM1

AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND

PWM0

PWM2

VBAT

EXT

GND VIN GND

GND

Figure 6. Remove Battery Tab

NOTE: Rabbit recommends that the battery tab not be removed until you are ready to

place the LP3500 in normal service with regular power connected through header J2.

The backup battery protects the contents of the SRAM and keeps the real-time clock running when regular power to the LP3500 is interrupted. If you plan to use the real-time clock functionality in your application, you will need to set the real-time clock once you remove the plastic tab. Set the real-time clock using the onscreen prompts in the demonstration program. Alternatively, you may set the real-time clock using the SETRTCKB.C sample program from the Dynamic C SAMPLES\RTCLOCK folder. The RTC_TEST.C sample program in the Dynamic C

SAMPLES\RTCLOCK folder provides additional exam-

ples of how to read and set the real-time clock.

User’s Manual 13

2.3 Installing Dynamic C

If you have not yet installed Dynamic C version 7.26P (or a later version), do so now by inserting the Dynamic C CD in your PC’s CD-ROM drive. The CD will auto-install unless you have disabled auto-install on your PC.

If the CD does not auto-install, click Start > Run from the Windows Start button and browse for the Dynamic C setup.exe file on your CD drive. Click OK to begin the installation once you have selected the setup.exe file.

The Dynamic C User’s Manual provides detailed instructions for the installation of Dynamic C and any future upgrades.

NOTE: If you have an earlier version of Dynamic C already installed, the default instal-

lation of the la te r ver sion wi ll b e in a dif f erent fold er, and a separate icon wil l app ear on your desktop.

2.4 St arting Dynamic C

Once the LP3500 is connected to your PC and to a power source, start Dynamic C by double-clicking on the Dynamic C icon on your desktop or in your Start menu.

If you are using a USB port to connect your computer to the LP3500, choose Options >

Project Options

Click OK.

and select “Us e USB to Serial Conver ter” on t he Communications tab.

Dynamic C assumes, by default, that you are using serial port COM1 on your PC when you are running a program. If you are LP3500 and go through a sequence

using COM1, then Dynamic C should detect the

of steps to cold-boot the LP3500 and to compile the BIOS. If the error message “Rabbit Processor Not Detected” appears, you have probably connected to a different PC serial port such as COM2, COM3, or COM4. You can change the serial port used by Dynamic C with the OPTIONS menu, then try to get Dynamic C to recognize the LP3500 by selecting Reset Target/Compile BIOS on the Compile menu. Try the different COM ports in the OPTIONS menu until you find the one you are connected to. If you still can’t get Dynamic C to recognize the target on any port, then the hookup may be wrong or the COM port might not working on your PC.

Dynamic C automatically uses a maximum debug baud rate of 38,400 bps when an LP3500 series board is in use.

14 Fox (LP3500)

2.5 PONG.C

You are now ready to test your set-up by running a sample program. Find the file PONG.C, which is in the Dynamic C SAMPLES folder. To run the program,

open it with the File menu (if it is not still open), then compile and run it by pressing F9 or by selecting Run in the Run menu. The STDIO window will open and will display a small square bouncing around in a box.

This program shows that the CPU is working.

2.6 Where Do I Go From Here?

NOTE: If you purchased yo ur LP350 0 through a distr ibutor o r Rabbit partner, contact the

distributor or partner first for technical support.

If there are any problems at this point:

• Use the Dynamic C Help menu to get further assistance with Dynamic C.

• Check the Rabbit Technical Bulletin Board and forums at www.rabbit.com/support/bb/

and at www.rabbit.com/forums/.

• Use the Technical Support e-mail form at www.rabbit.com/support/. If the sample program ran fine, you are now ready to go on to explore other LP3500 fea-

tures and develop your own applications. Chapter 3, “Subsystems,” provides a description of the LP3500’s features, Chapter 4,

“Software,” describes the Dynamic C software libraries and introduces some sample programs. These sample programs can be used as templates for applications you may wish to develop.

User’s Manual 15

16 Fox (LP3500)

3. SUBSYSTEMS

Chapter 3 describes the principal subsystems for the LP3500.

• Power Modes

•Digital I/O

• Serial Communication

• A/D Converter Inputs (LP3500 only)

• PWM Outputs

• Relay Output Circuit (LP3500 only)

• Memory

Figure 7 shows these Rabbit-based subsystems designed into the LP3500.

SRAM

Flash

LP3500

32 kHz

osc

RABBIT

3.7 MHz

3000

Programming

Port

Serial

Interface

RS-232

osc

RS-485

Decoder

Control

Figure 7. LP3500 Subsystems

Interface

LCD/Keypad

Module

Digital Inputs

Digital

Outputs

Relay

Output

A/D

Converter

PWM

Outputs

User’s Manual 17

3.1 LP3500 Pinouts

The LP3500 pinouts are shown in Figure 8.

IN15

IN14

IN13

IN12

IN11

IN10

17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

Analog

Inputs

PWM

Outputs

Power

VBAT EXT

Supply

Programming

Port

AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7

GND PWM0 PWM1 PWM2

GND

VIN

GND

PROGRAM

PORT

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

RESET

Serial

Interface

Digital Inputs

IN09

IN08

GND

IN07

IN06

IN05

IN04

IN03

IN02

IN01

Battery

IN00

GND

RxE

TxE

GND

RxC/CTS TxC/RTS GND RxB TxB GND RS-485+ RS-485 GND +K OUT9 OUT8 OUT7 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0 GND

RS-232

RS-485

Digital

Outputs

20 19 18 17 16 15 14 13 12

OUT9

OUT8

OUT7

OUT6

OUT5

OUT4

OUT3

OUT2

OUT1

OUT0

2 1

GND

Display Interface

DISPLAY

RELAY

COM

Relay

Outputs

Figure 8. LP3500 Pinouts

NOTE: Although header J2 is installed on the LP3510, the associated analog I/O are not

available on the LP3510. The relay screw-terminal header at J8 is also not installed on the LP3510. The power supply inputs on header J2 are still available.

3.1.1 Headers and Screw Terminals

Standard LP3500 models are equipped with two 1 × 17 headers (J1 and J2) with a pitch of

0.1", one 1 × 25 header (J4) with a pitch of 0.1", and one 1 × 3 screw terminal strip (J8). The Display Interface (J9) is a 2 × 13 header with a pitch of 0.1", and the Serial Interface is a 2 mm 2 × 5 socket.

A variety of commercially available connectors with a 0.1" pitch can be used to interface to the signals on headers J1, J2, and J4, or the Prototyping Board may be used to access these signals via screw-terminal headers.

18 Fox (LP3500)

3.2 Power Modes

See note

16 mA

Consumption

Typical Current

Supports

from Table 3

Subsystems

Supports

Relay Output

Power Source

5 mA

1.0 mA

140 µA

battery

VIN or external

No No

External battery

70 µA

No No 46 µA

lator turned off)

(with linear regu-

or ext. battery

Onboard ba ttery

See

Code

None VIN Yes Yes

Restrictions

and

SRAM and

Section 3.2.1

Section 3.2.2

R TC updates

Table 2. Software-Defined Power Modes

Low-

Power

8 8.192 kHz

None

Modes

9 4.096 kHz

Processor halted None

10 2.048 kHz

Power-Save Mode 2.048 kHz

NOTE: The actual current consumption depends heavily on the SRAM writes in the user’s program. See Section 3.2.2 for more

information.

Debug

Capability

Clock

Frequency

Mode

User’s Manual 19

Normal

7.3728 MHz

Modes

Normal

2 3.6864 MHz

3 1.8423 MHz

4 1.2288 MHz

32.768 kHz

5 0.9216 MHz

7 16.384 kHz

Table 2 lists the power modes based on clock frequency that can be defined in software using the powerMode function.

The LP3500 can operate at various power levels, depending on the clock frequency and on which subsystems on the board are turned off using the devPowerSet function. Table 3 lists the LP3500 subsystems that can be turned off with the devPowerSet function.

Table 3. LP3500 Subsystems That Can Be Turned Off

LP3500 Section Description

RS-232 Receivers and transmitters are disabled, RxE remains active. RS-485 Transmitter is disabled. A/D Converter

(LP3500 model only) LCD/Keypad Module LCD/keypad module is turned off. All of the Above All sections are disabled as described above.

NOTE: RxE always remains active when the above systems are turned off to allow the

LP3500 to “listen” while it is in the

ADS7870 internal oscillator is turned off.

power-save mode.

The LP3500 processor turns off automatically when VIN is removed, and the processor will not operate again until VIN is restored. The onboard battery provides backup for the SRAM and the real-time clock. VIN must be applied to the LP3500 in order to run or set the processor in any of the numbered modes listed in Table 2.

3.2.1 Setting the Power-Save Mode

The LP3500 can be placed in the power-save mode using one of three different software calls,

serCommAlert, timedAlert, or digInAlert,

depending on whether you wish to use Serial Port E, a simple timeout, or a digital input to trigger the LP3500 to resume operation in one of the other power modes.

If you call serCommAlert, then any activity on Serial Port E will trigger the LP3500 out of the low-power mode. If you call timedAlert, then the LP3500 is triggered out of the power-save mode when the specified time has elapsed. If you call digInAlert, then the LP3500 is triggered out of the power-save mode when the specified channel is activated.

In addition, digInAlert and serCommAlert have “backup” timeout parameters associated with them to wake up the LP3500 after a specified period even in the absence of the digital or serial triggers.

20 Fox (LP3500)

3.2.2 Operating in the Power-Save Mode

VIN may be removed to allow the LP3500 to operate using the external battery once the LP3500 is in Mode 10. At this point, the LP3500 will draw 200 µA after the subsystems listed in T able 3 are turned off. The LP3500’ s linear regulator may then be turned off using the setpowersource function call, and this will lower the current draw to 100 µA.

The LP3500 digital I/O can continue to operate (remember that an independent +K source is required for the digital outputs) using special software routines.

Here are some tips for when the LP3500 is in the power-save mode.

1. Do not write to the SRAM while the LP3500 is in power-save mode and you are relying solely on the onboard backup battery.

2. When the linear regulator is turned off, watch your current consumption carefully since too high a current draw could trigger a system reset and turn off the processor.

3.2.3 Resuming Normal-Power or Low-Power Operation

As long as VIN is still connected and the linear regulator has not been turned off, the LP3500 will return automatically to the previous power mode once the non-zero timeout specified in serCommAlert, timedAlert, or digInAlert has elapsed.

NOTE: The processor wil l tur n of f if VIN i s not ava ilable at th e e xpirat ion of the timeout

or if VIN is not available when a wake-up signal comes in through Serial Port E or the selected digital input.

When the timeout is set to 0, which corresponds to an indefinite timeout, the LP3500 may still be restored to a normal power mode from the power-save mode.

1. Make sure that raw DC power is available at VIN.

2. Turn the linear regulator back on using the setpowersource function call.

3. Use the rdPowerState function call to establish that the LP3500 is now operating from VIN. Note that this function only works with LP3500 models, which have the A/D converter.

4. Use the powerMode function call to set the desired power mode.

User’s Manual 21

3.3 Digital I/O

3.3.1 Digital Inputs

The LP3500 has 16 digital inputs, IN00–IN15. The inputs are factory-configured to be pulled up to +K in banks of eight, but they can also be pulled up to Vcc or down to 0 V in banks of eight by changing a surface-mounted 0 Ω resistor as shown in Figure 9.

Vcc

Factory

0 W

22 kW

Default

GND

Figure 9. LP3500 Digital Inputs [Pulled Up—Factory Default]

The digital inputs are each fully protected over a range of 0 V to +36 V, and can handle short spikes of ±40 V. The actual switching threshold is approximately 1.40 V. Anything below this value is a logic 0, and anything above is a logic 1

100 kW

330 nF

+40 V

+36 V

Microprocessor

Spikes

Rabbit 3000

Normal Switching

Spikes

Levels

Pulling the digital inputs to Vcc will

+3.3 V

increase the current consumption by about 300 µA for each digital input.

Digital Input Voltage

40 V

Figure 10. LP3500 Digital Input Protected

22 Fox (LP3500)

Spikes

Range

3.3.2 Digital Outputs

The LP3500 has 10 digital outputs: OUT0–OUT7 can each sink up to 200 mA, and OUT8–OUT9 can each source up to 200 mA at 36 V. Figure 11 shows a wiring diagram for using the digital outputs in a sinking or a souring configuration.

SINKING OUTPUTS (OUT0OUT7)

Current

Flow

1 MW

SOURCING OUTPUTS (OUT8OUT9)

Vcc

Current

Flow

Figure 11. LP3500 Digital Outputs

TIP: Turn the outputs off (high for sourcing outputs and low for sinking outputs) to

reduce current consumption.

User’s Manual 23

When the LP3500 is connected to the Prototyping Board, a 0 Ω resistor on the Prototyp-

GND

VIN

ing Board (R1) ties +K to VIN, the raw DC input voltage. Figure 12 shows the location of

DS4 DS3 DS2 DS1

PWR

this 0 Ω resistor on the Prototyping Board.

NOTE: R1 on the Prototyping Broad

must be removed to avoid damage to the power supplies if you are using the Prototyping Board with the LP3500 and you are using separate power supplies for VIN and K.

OUT8 OUT7 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0

J44

Figure 12. Location of R1

on Prototyping Board

When the LP3500 is used alone, remember to connect a power supply to +K (pin 12 on header J7). Your +K supply may be up to +36 V DC, and should be capable of delivering up to 2.0 A.

NOTE: If +K is not connected, the dig ital inputs may floa t, which may in creas e your cur -

rent consumption.

24 Fox (LP3500)

3.4 Serial Communication

The LP3500 has three RS-232 serial ports that can set using the serMode software function call as one RS-232 serial channel (with RTS/CTS) and one 3-wire channel, or they may be set as three RS-232 (3-wire) channels. Table 4 summarizes the options.

Table 4. RS-232 Serial Communication Configurations

serMode

B C E

Serial Port

0 RS-232, 3-wire RS-232, 3-wire RS-232, 3-wire 1 RS-232, 5-wire CTS/RTS RS-232, 3-wire

The LP3500 also has one RS-485 serial channel (Serial Port F), one CMOS-level serial interface port (Serial Port D), and one CMOS-level serial channel that serves as the programming port (Serial Port A).

All six serial ports operate in an asynchronous mode. An asynchronous port can handle 7 or 8 data bits. A 9th bit address scheme, where an additional bit is sent to mark the first byte of a message, is also supported. Serial Port D and Serial Port A, the programming port, can be operated alternately in the clocked serial mode. In this mode, a clock line synchronously clocks the data in or out. Either of the two communicating devices can supply the clock. The LP3500 uses a 3.6864 MHz crystal, which is doubled to 7.3728 MHz. At this frequency, the LP3500 supports standard asynchronous baud rates up to a maximum of 921,600 bps.

Table 5 lists the use and the capabilities of the six serial ports.

Table 5. LP3500 Serial Port Uses and Capabilities

Serial Port Use

B 3-wire RS-232 J4 No

E RS-232 J4 No F RS-485 J4 No

User’s Manual 25

Programming port or logic-level serial port

3-wire RS-232 or RTS/CTS flow control for Serial Port B

Serial interface port supports SPI device, also used by A/D converter on LP3500

Header

Location

J5 Yes

J4 No

J6 Yes

Synchronous

Capability

3.4.1 RS-232

The LP3500 RS-232 serial communication is supported by an RS-232 transceiver. This transceiver provides the voltage o utp ut, sl ew rate, and i npu t v oltage i mmuni ty requi red to meet the RS-232 serial communicatio n p roto co l. Bas icall y, the chip translates the Rabbit 3000’s logic-level signals to RS-2 32 s ignal l evels . No te t hat the pola rity is reverse d in an RS-2 32 circuit so that a +2.8 V output becom es app roxi mately -7 V and 0 V is out put as +7 V. The RS-232 transceiver also provides t he proper l ine loadi ng for reliable comm uni cation.

RS-232 can be used effectively at the LP3500’s m aximum baud rate for distances of up to 15 m.

Logic-level signals are also possible on Serial Ports B, C, and E by changing the 0 Ω surface-mounted resistor jumper settings at locations JP1–JP6.

Serial Port E can be set to “listen” and “wake up” the LP3500 when the unit is in a lowpower mode.

3.4.2 RS-485

The LP3500 has one RS-485 serial channel, which is connected to Serial Port F on the Rabbit 3000 through an RS-485 transceiver. The half-duplex communication uses the Rabbit 3000’s PG0 pin to control the transmit enable on the communication line.

The RS-485 transceiver used on the LP3500 is only capable of supporting a maximum baud rate of 64,000 bits/s.

The LP3500 can be used in an RS-485 multidrop network. Connect the 485+ to 485+ and 485– to 485– using single twisted-pair wires (nonstranded, tinned) as shown in Figure 13. Note that a common ground is recommended.

26 Fox (LP3500)

IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15

AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND

PWM0

PWM1

PWM2

VBAT

EXT

GND VIN GND

PROGRAM

PORT

GND

AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND

PWM0

PWM1

PWM2

VBAT

EXT

GND VIN GND

PROGRAM

PORT

AIN0 AIN1 AIN2 AIN3

Battery

RESET

DISPLAY

AIN0 AIN1 AIN2 AIN3

Ground recommended

+K GND  485 + GND TxB RxB GND TxC RxC GND TxE RxE GND

OUT9

OUT8

OUT7

OUT6

OUT5

OUT4

OUT3

OUT2

OUT1

OUT0

GND

RELAY

COM

IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15

TxB

GND

485+

485

OUT9

Battery

+K GND  485 + GND TxB RxB GND TxC RxC GND TxE RxE GND

OUT9

OUT8

OUT7

OUT6

RESET

OUT5

OUT4

OUT3

OUT2

OUT1

OUT0

GND

DISPLAY

RELAY

COM

Figure 13. LP3500 Multidrop Network

Zener diodes are used in lieu of termination and bias resistors to minimize power consumption.

User’s Manual 27

3.4.3 Serial Interface P ort

The LP3500 offers a serial interface port at header J6, a 2 mm 2 × 5 socket. This port may be used to connect serial logic-level devices such as Rabbit’s SF1000 serial flash expansion cards to Serial Port D on the Rabbit 3000. The PIO_0, PIO_1, PIO_2, and PF2_SRST signals are not used by the SF1000 serial flash expansion cards.

PIO_2 PIO_1 PIO_0

PF0_SCK

PC1_SRX

PF2_SRST PB7_SFCS PC0_STX Vcc GND

Figure 14 provides the pinout for the serial interface port.

Figure 14. Serial Interface Port

(Header J6) Pinout

3.4.4 Programming Port

The LP3500’s serial programming port is accessed using header J5. The programming port uses the Rabbit 3000’s Serial Port A for communication. Dynamic C uses the programming port to download and debug programs.

The programming port is also used for the following operations.

• Cold-boot the Rabbit 3000 on the LP3500 after a reset.

• Remotely download and debug a program over an Ethernet connection using the

RabbitLink EG2110.

• Fast copy designated portions of flash memory from one Rabbit-based board (the master) to another (the slave) using the Rabbit Cloning Board.

In addition to Serial Port A, the Rabbit 3000 startup-mode (SMODE0, SMODE1), status, and reset pins are available on the programming port.

The two startup mode pins determine what happens after a reset—the Rabbit 3000 is either cold-booted or the program begins executing at address 0x0000.

The status pin is used by Dynamic C to determine whether a Rabbit microprocessor is present. The status output has three different programmable functions:

1. It can be driven low on the first op code fetch cycle.

2. It can be driven low during an interrupt acknowledge cycle.

3. It can also serve as a general-purpose CMOS output.

The /RESET_IN pin is an external input that is used to reset the Rabbit 3000 and the LP3500 onboard peripheral circuits. The serial programming port can be used to force a hard reset on the LP3500 by asserting the /RESET_IN signal.

28 Fox (LP3500)

Alternate Uses of the Serial Programming Port

All three clocked Serial Port A signals are available as

• a synchronous serial port

• an asynchronous serial port, with the clock line usable as a general CMOS input

The programming port may also be used as a serial port once the application is running. The SMODE pins may then be used as inputs and the status pin may be used as an output.

Refer to the Rabbit 3000 Microprocessor User’s Manual for more information.

User’s Manual 29

3.5 Display Interface

The LP3500 supports an interf ace with the parall el ports on the Rabbit 3000 via the Display Interface at header J9. The Display Interface may be used with Rabbit’s LCD/keypad module, which offers an operator interface with seven keys and a 122 × 32 graphic display.

Figure 15 provides the pinout for the Display Interface. Appendix C, “LCD/Keypad Module,” provides further

information on the LCD/keypad module.

BFD7 BFD5 BFD3 BFD1

BFA0 BFA2

GND

GND LED5 LED3 LED1

DISP

VDISP

BFD6 BFD4 BFD2 BFD0 BFA1 BFA3 GND LED6 LED4 LED2 LED0 DPRST VDISP

Figure 15. Display Interface

(Header J9) Pinout

30 Fox (LP3500)

3.6 A/D Converter Inputs (LP3500 only)

The single 8-channel A/D converter chip used in the LP3500 (the LP3510 does not have analog capabilities) has a resolution of 12 bits for differential measurements or 11 bits for single-ended measurements. Four of the channels can be jumpered individually for 4–20 mA using jumpers across pins on header J3, and all 8 channels can be used over several software-scaled voltage ranges.

The

A/D converter chip has an internal amplifier that works with the resistor divider net-

work on the analog inputs as shown in

+ V

Figure 16.

AIN0

AIN1

953 kW

ADC

Jumper pins to configure for 420 mA

AGND

100 W

52.3 kW

100 pF

Figure 16. Buffered A/D Converter Inputs

The

A/D converter chip can be programmed in software to operate over the voltage ranges

shown in

Table 6.

Table 6. A/D Converter Input Ranges

Gain Code Multiplier

0 1 0–20 V 1 2 0–10 V 2 4 0–5 V

Voltage

Range

3 5 0–4 V 4 8 0–2.5 V 5 10 0–2 V 6 16 0–1.25 V 7 20 0–1 V

User’s Manual 31

Single-ended measurements are made by connecting the analog signal between an analog input channel (AIN0–AIN7) and AGND. Differential measurements are made by connecting a pair of differential analog signals to an adjacent pair of analog input channels (AIN0–AIN1, …, AIN6–AIN7). The A/D converter is only capable of converting positive voltages, and so will convert the difference between an adjacent pair of input channels, and must be scaled for a voltage range appropriate for the voltage differences.

Table 7 lists the jumper configurations for header J3 used to set the 4–20 mA and the voltage measurement options.

Table 7. Header J3 Configuration for Analog I/O Options

Analog Input Channel

AIN0 Jumper “parked” on pin 2 Pins 1–2 connected AIN1 Jumper “parked” on pin 4 Pins 3–4 connected AIN2 Jumper “parked” on pin 6 Pins 5–6 connected AIN3 Jumper “parked” on pin 8 Pins 7–8 connected

CAUTION: If you have enabled the 4–20 mA current option on any of the AIN0–AIN3

channels, be careful with any voltage sources that you might connect to these inputs. The voltage must be le ss than 2.5 V to keep the current ac ro ss the 100 Ω resistor below the maximum allowed current.

Voltage Option

(Factory Default)

4–20 mA Option

The A/D converter inputs are factory-calibrated, and the calibration constants are stored in flash memory . You may calibrate the A/D converter inputs at a later time using the software functions described in Section 4.4.5, “A/D Converter Inputs.”

NOTE: If you are using a fixed v oltage range, you sho uld recal ibrate you r LP3500 at tha t

range.

AIN7 can be used to monitor Vcc using the VccMonitorInit function. While Vcc can be monitored in all the power modes, Vcc monitoring is particularly useful when the LP3500 is being operated from an external battery to monitor the voltage being supplied by the battery.

The VccMonitorInit function requires the operation of the A/D converter, which consumes about 500 µA. The Vcc monitoring circuit itself consumes about 15 µA while it is

engaged.

Turn off VccMonitorInit() (and the A/D converter if it is not going to be

used) when the test is done to extend your battery life.

32 Fox (LP3500)

3.7 PWM Outputs

The D/A conversion outputs are pulse-width modulated and scaled to provide an output from 0 V to Vcc (approx. 2.8 V).

Figure 17 shows the PWM outputs.

Rabbit 3000

Microprocessor

1 kW

PWM0

PWM1

1 nF

GND

Figure 17. PWM Outputs

User’s Manual 33

3.8 Relay Output Circuit (LP3500 only)

A bistable relay is stuffed on LP3500 models only at position K1, and the relay contacts are accessed via screw-terminal header J8. The relay can switch up to 1 A at 30 V DC.

The relay is set via Parallel Port PG4 on the Rabbit 3000, and is reset via Parallel Port PG5 by a 10 ms pulse. The relay resets when the LP3500 resets, and operates only in the normal power modes.

NOTE: The relay does not reset automatically when power is removed from the

LP3500.

PG4

Rabbit 3000

Microprocessor

PG5

SET

RESET

10 nF

5.1 W

10 nF

COM

Figure 18. Relay Output Circuit

NOTE: Switching the rela y may con sume up to 120 mA during the roughly 10 ms that it

takes for the relay to switch. Make sure that your power supply has sufficient capacity to handle this sur ge c urrent to avoi d putti ng the LP3 500 into the power - save mode . The relay does not consume any current while it is in the NO or the NC position and is not switching.

34 Fox (LP3500)

3.9 Serial Programming Cable

The programming cable is used to connect the LP3500’s serial programming port to a PC serial COM port. The programming cable converts the RS-232 voltage levels used by the PC serial port to the CMOS voltage levels used by the Rabbit 3000.

When the

PROG connector on the programming cable is connected to the LP3500’ s serial

programming port at header J5, programs can be downloaded and debugged over the serial interface.

The DIAG connector of the programming cable may b e u sed on header J5 of th e LP3500 with the LP3500 operating in the Run Mode. This allows the programming port to be used as a regular serial port.

3.9.1 Changing Between Program Mode and Run Mode

The LP3500 is automatically in Program Mode when the PROG connector on the programming cable is attached, and is automatically in Run Mode when no programming cable is attached. When the Rabbit 3000 is reset, the operating mode is determined by the state of the SMODE pins. When the programming cable’s PROG connector is attached, the SMODE pins are pulled high, placing the Rabbit 3000 in the Program Mode. When the programming cable’s PROG connector is not attached, the SMODE pins are pulled low, causing the Rabbit 3000 to operate in the Run Mode. See Figure 19.

IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15

RN2

C10 C13

RN1

AIN0 AIN1 AIN2 AIN3

AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND

C15

C12

D11

R17

Program Mode

OUT9

OUT8

OUT7

+K GND  485 + GND TxB RxB GND TxC RxC GND TxE RxE GND

D19

D20

D26

C16

C19

C20

R13

R16

Colored edge

R37

D15 D17

C22

D13

R23

Q22

R30

C24

R18

C26

R20

R22

C36

RP17

R57

Battery

R31

C29

C33

R29

R25

C37

R26

D25

R42

D21

D18

R38

C48

Q6 C53

C51

R34

R41

R39

C55

C43

BT1

C44

R40 C54

R36

C50

R32

C40

D22

PWM1

PWM2

PWM0

VBAT

GND VIN GND

EXT

Power

OUT5

OUT4

OUT6

D28

Q10

R43

R33

Y2 C61

R44

R45

C59

C60

RESET

OUT1

OUT0

OUT2

OUT3

GND

D30

D34

Q17

Q16

Q13

D32

Q12

U12

R47

D33Q14

U11

C66

R48

C64

U13

U10

RP13

C65

R50 R49

RP14

PROG

PROGRAM

PORT

Programming

C67

R51

DIAG

C70

R58

Q20

R54

RELAY

R56

R55

DISPLAY

GND

Cable

COM

IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15

RN2

RN1

AIN0 AIN1 AIN2 AIN3

AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND

C10 C13

C16

C19

C15

C12

D11

R13

R16

R17

C36

D15 D17

RP17

Battery

C20

C22

C29

D13

R23

Q22

R30

C24

R18

C26

C33

R29

R20

R25

C37

R26

R22

Run Mode

OUT9

OUT8

OUT7

+K GND  485 + GND TxB RxB GND TxC RxC GND TxE RxE GND

D19

D20

D26

R37

D25

R42

D21

D18

R38

C48

C53

R57

C51

R31

R34

R41

R39

C55

C43

BT1

C44

R40 C54

R36

C50

R32

C40

D22

PWM1

PWM2

PWM0

VBAT

GND VIN GND

EXT

Power

OUT5

OUT6

R44

OUT4

OUT3

D28

Q10

R43

R33

Y2 C61

Q12

R47

R45

C59

C60

U10

RESET

R50 R49

RESET

switch

OUT1

OUT0

OUT2

GND

RELAY

D30

D34

Q17

Q16

Q13

U11

C66

R48

RP13

PROGRAM

PORT

COM

R56

D32

R55

C67

U12

D33Q14

DISPLAY

C64

U13

C70

R51

R58

C65

Q20

R54

RP14

GND

PC COM port

RESET LP3500 when changing mode: Press RESET switch,

Cycle power off/on

after removing or attaching programming cable.

Figure 19. LP3500 Program Mode and Run Mode Set-Up

User’s Manual 35

A program “runs” in either mode, but can only be downloaded and debugged when the LP3500 is in the Program Mode.

Refer to the Rabbit 3000 Microprocessor User’s Manual for more information on the pro- gramming port and the programming cable.

3.9.2 Standalone Operation of the LP3500

The LP3500 must be programmed via the Prototyping Board or via a similar arrangement on a customer-supplied board. Once the LP3500 has been programmed successfully, remove the serial programming cable from the programming connector and reset the LP3500. The LP3500 may be reset by cycling the power of f/on or by pressing the RESET button on the Prototyping Board. The LP3500 module may now be removed from the Prototyping Board for end-use installation.

CAUTION: Disconnect power to the Prototyping Board or other boards when removing

or installing your LP3500 to protect against inadvertent shorts across the pins or damage to the LP3500 if the pins are not plugged in correctly. Do not reapply power until you have verified that the LP3500 is plugged in correctly.

3.10 Other Hardware

3.10.1 Spectrum Spreader

The Rabbit 3000 features a spectrum spreader, which helps to mitigate EMI problems. By default, the spectrum spreader is on automatically, but it may also be turned off or set to a stronger setting. The means for doing so is through a simple global macro as shown below.

1. Select the “Defines” tab from the Dynamic C Options > Project Options menu.

2. Normal spreading is the default, and usually no entry is needed. If you need to specify normal spreading, add the line

ENABLE_SPREADER=1

For strong spreading, add the line

ENABLE_SPREADER=2

To disable the spectrum spreader, add the line

ENABLE_SPREADER=0

NOTE: The strong spectrum-spreading setting is not recommended since it may limit

the maximum clock speed or the maximum baud rate. It is unlikely that the strong setting will be used in a real application.

3. Click OK to save the macro. The spectrum spreader will now be set to the state specified by the macro value whenever you are in the project file where you defined the macro.

NOTE: Refer to the Rabbit 3000 Microprocessor User’s Manual for more information

on the spectrum-spreading setting and the maximum clock speed.

36 Fox (LP3500)

3.11 Memory

3.11.1 SRAM

The LP3500 module is designed to accept 128K to 512K of SRAM at U5. The standard LP3500 modules come with 512K of SRAM.

3.11.2 Flash Memory

The LP3500 is also designed to accept 256K to 512K of flash memory at U6 and U7. The standard LP3500 modules comes with two 256K flash memory chips.

NOTE: Rabbit recommends that any c ustomer applications should not be constra ine d by

the sector size of the flash memory since it may be necessary to change the sector size in the future.

A Flash Memory Bank Se lect jump er configuration option based on 0 Ω surface-mounted resistors exists at header JP10. This option, used in conjunction with some configuration macros, allows Dynamic C to compile two different co-resident programs for the upper and lower halves of the 256K flash in such a way that both programs start at logical address 0000. This is useful for applications that require a resident download manager and a separate downloaded program. See Rabbit’s Technical Note 218, Implementing a Serial Download Manager for a 256K Flash, in the online documentation for details.

User’s Manual 37

38 Fox (LP3500)

4. SOFTWARE

Dynamic C is an integrated development system for writing embedded software. It runs on an IBM-compatible PC and is designed for use with sing le-board computers and other devices based on the Rabbit microprocessor.

Chapter 4 provides the libraries, function calls, and sample programs related to the LP3500.

You have a choice of doing your software development in the flash memory or in the static RAM included on the LP3500. The flash memory and SRAM options are selected with the

Options > Project Options > Compiler menu.

The advantage of working in RAM is to save wear on the flash memory, which is limited to about 100,000 write cycles. The disadvantage is that the code and data might not both fit in RAM.

NOTE: An application can be developed in RAM, but can not run sta nda lone from RAM

after the programming cable is disconnected. All standalone applications can only run from flash m emory.

NOTE: Do not depend on the flash memory sector size or type. Due to the volatility of

the flash memory market, the LP3500 and Dynamic C were designed to accommodate flash devices with various sector sizes.

Developing software with Dynamic C is simple. Users can write, compile, and test C and assembly code without leaving the Dynamic C development environment. Debugging occurs while the application runs on the target. Alternatively , users can compil e a program to an image file for later loading. Dynamic C runs on PCs under Windows 2000/NT and later .

Rabbit’s Technical Note TN257, Running Dynamic C® With Windows Vista®, in the online documentation set provides additional information about using Windows Vista®

with versions of Dynamic C prior to v. 9.60. Programs can be downloaded at baud rates of up to 460,800 bps after the program

compiles.

User’s Manual 39

Dynamic C has a number of standard features.

• Full-feature source and/or assembly-level debugger, no in-circuit emulator required.

• Royalty-free TCP/IP stack with source code and most common protocols.

• Hundreds of functions in source-code libraries and sample programs:

X Exceptionally fast support for floating-point arithmetic and transcendental functions. X RS-232 and RS-485 serial communication. X Analog and digital I/O drivers.

X I2C, SPI, GPS, encryption, file system. X LCD display and keypad drivers.

• Powerful language extensions for cooperative or preemptive multitasking

• Loader utility program to load binary images into Rabbit targets in the absence of

Dynamic C.

• Provision for customers to create their own source code libraries and augment on-line help by creating “function description” block comments using a special format for library functions.

• Standard debugging features:

X Breakpoints—Set breakpoints that can disable interrupts. X Single-stepping—Step into or over functions at a source or machine code level, µC/OS-II aware. X Code disassembly—The disassembly window displays addresses, opcodes, mnemonics, and

machine cycle times. Switch between debugging at machine-code level and source-code level by simply opening or closing the disassembly window.

X Watch expressions—Watch expressions are compiled when defined, so complex expressions

including function calls may be placed into watch expressions. Watch expressions can be updated with or without stopping program execution.

X Register window—All processor regi sters and fla gs are displ ayed. The content s of general r egisters

may be modified in the window by the user.

X Stack window—shows the contents of the top of the stack. X Hex memory dump—displays the contents of memory at any address. X STDIO window—printf outputs to this window and keyboard input on the host PC can be

detected for debugging purposes.

printf output may also be sent to a serial port or file.

40 Fox (LP3500)

4.1 Upgrading Dynamic C

4.1.1 Patches and Bug Fixes

Dynamic C patches that focus on bug fixes are available from time to time. C heck the Web site www.rabbit.com/support/ for the latest patches, workarounds, and bug fixes.

The default installation of a patch or bug fix is to install the file in a directory (folder) different from that of the original Dynamic C installation. Rabbit recommends using a different directory so that you can verify the operation of the patch without overwriting the existing Dynamic C installation. If you have made any changes to the BIOS or to libraries, or if you have programs in the old directory (folder), make these same changes to the BIOS or libraries in the new directory containing the patch. Do not simply copy over an entire file since you may overwrite a bug fix; of course, you may copy over any programs you have written. Once you are sure the new patch works entirely to your satisfaction, you may retire the existing installation, but keep it available to handle legacy applications.

4.1.2 Extras

Dynamic C installations are designed for use with the board they are included with, and are included at no charge as part of our low-cost kits.

In addition to the Web-based technical support included at no extra charge, a one-year telephone-based technical support subscription is also available for purchase.

V isit o ur Web site at www.rabbit.com for further information and complete documentation.

User’s Manual 41

4.2 Sample Programs

Sample programs are provided in the Dynamic C Samples folder. The sample program

PONG.C demonstrates the output to the STDIO window.

The various directories in the Samples folder contain specific sample programs that illustrate the use of the corresponding Dynamic C libraries.

The LP3500 folder provides sample programs specific to the LP3500. Each sample program has comments that describe the purpose and function of the program. Follow the instructions at the beginning of the sample program.

To run a sample program, open it with the File menu (if it is not still open), compile it using the Compile menu, and then run it by selecting Run in the Run menu. The LP3500 must be in the Program mode (see Section 3.9, “Serial Programming Cable”) and must be connected to a PC using the programming cable as described in Section 2.1, “LP3500 Connections.”

Appendix F, “Running a Sample Program,” takes you through the steps of running one of the sample programs.

4.2.1 Power Modes

The following sample program is found in the POWER subdirectory in SAMPLES\LP3500.

• POWER.C—This program demonstrates switching from the normal raw DC power source to an external battery using the Prototyping Board. Pressing a switch will change from the power source and will be displayed by flashing LEDs.

• LOWPWRDEMO.C—This program demonstrates a low-power mode with the normal power source connected to the LP3500.

4.2.2 Digital I/O

The following sample programs are found in the IO subdirectory in SAMPLES\LP3500.

• DIGIN.C—Demonstrates the use of the digital inputs. Using the Prototyping Board, you can see an input channel toggle from HIGH to LOW when pressing a pushbutton on the Prototyping Board.

• DIGOUT.C—Demonstrates the use of the high-current outputs configured as either sinking or sourcing outputs. Using the Prototyping Board, you can see an LED toggle on/off via a high-current output.

• DIGBANKIN.C—Demonstrates the use of the digital inputs. Using the Prototyping Board, you can see a bank of input channels toggle from HIGH to LOW when pressing a pushbutton on the Prototyping Board.

• DIGBANKOUT.C—Demonstrates the use of the high-current outputs configured as either sinking or sourcing outputs. Using the Prototyping Board, you can see a bank of channels toggle the corresponding LEDs on/off via high-current outputs.

42 Fox (LP3500)

4.2.3 Serial Communication

The following sample programs are found in the RS232 subdirectory in SAMPLES\LP3500.

• SIMPLE3WIRE.C—This program demonstrates basic initialization for a simple RS-232 3-wire loopback displayed in the STDIO window.

The following sample programs are found in the RS485 subdirectory in SAMPLES\LP3500.

• SIMPLE485MASTER.C—This program demonstrates a simple RS-485 transmission of lower case letters to a slave LP3500. The slave will send back converted upper case letters back to the master LP3500 and display them in the STDIO window. Use

SIMPLE485SLAVE.C to program the slave LP3500.

• SIMPLE485SLAVE.C—This program demonstrates a simple RS-485 transmission of

lower case letters to a slave LP3500. The slave will send back converted upper case letters back to the master LP3500 and display them in the

SIMPLE485MASTER.C to program the master LP3500.

STDIO window. Use

4.2.4 A/D Converter Inputs

The following sample programs are found in the ADC subdirectory in SAMPLES\LP3500.

• AD_RDVOLT_ALL.C—This program reads and displays the voltage and equivalent values of each single-ended A/D converter channel. Coefficients are read from the A/D converter's simulated EEPROM in flash memory to compute the equivalent voltages. Computed raw data and equivalent voltages are displayed in the

STDIO window.

• AD_RDVOLT_CH.C—This program reads and displays the voltage and equivalent values of one single-ended A/D converter channel. Coefficients are read from the A/D converter's simulated EEPROM in flash memory to compute the equivalent voltages. Computed raw data and equivalent voltages are displayed in the STDIO window.

• AD_RDDIFF_CH.C—This program demonstrates reading one differential A/D converter channel. Coefficients are read from the A/D converter's simulated EEPROM in flash memory to compute the equivalent voltages. Computed raw data and equivalent voltages are displayed in the

STDIO window.

• AD_RDMA_CH.C—This program demonstrates reading one milliampere A/D converter channel. Coefficients are read from the A/D converter's simulated EEPROM in flash memory to compute the equivalent currents. Computed raw data and equivalent currents are displayed in the STDIO window.

• AD_SAMPLE.C—This program demonstrates how to use the A/D low-level driver. The program will display the average voltage that is present on an A/D converter channel. The particular channel and the number of samples may be changed by the user.

User’s Manual 43

4.2.5 PWM Outputs

The following sample program is found in the IO subdirectory in SAMPLES\LP3500.

• PWMOUT.C—This program demonstrates the PWM functions. It will set the PWM channels, PWM0–PWM2, to the following duty cycles:

PWM Channel 0 to 10% PWM Channel 1 to 25% PWM Channel 2 to 50%

All activity will be displayed in the STDIO window.

4.2.6 Relay Output

The following sample program is found in the RELAY subdirectory in SAMPLES\LP3500.

• SWRELAY.C—This program demonstrates the relay-switching function call operating on normal power source. Use the pushbutton switches on the Prototyping Board to switch the relay between the SET (NO) and RESET (NC) positions. All activity will be displayed with the LEDs.

4.2.7 Vcc Monitoring

The following sample program is found in the POWER subdirectory in SAMPLES\LP3500.

• VCCMONITOR.C—This program demonstrates the Vcc monitoring function on AIN7. All activity will be displayed in the STDIO window

4.2.8 LP3500 Calibration

The following sample programs are found in the ADC subdirectory in SAMPLES\LP3500.

• AD_CAL_ALL.C—This program demonstrates how to recalibrate all single-ended A/D converter channels using two known voltages to generate constants for each channel, and will be written into the user block data area. The program uses the STDIO window to display the voltage that is being monitored.

NOTE: This sample program will overwrite the calibration constants set at the factory.

• AD_CAL_CHAN.C—This program demonstrates how to recalibrate one single-ended A/D converter channel using two known voltages to generate constants for each channel, and will be written into the user block data area. The program uses the STDIO window to display the voltage that is being monitored.

NOTE: This sample program will overwrite the calibration constants set at the factory.

• AD_CALDIFF_CH.C—This sample program demonstrates how to recalibrate one differential A/D converter channel using two known voltages to generate constants for that channel and rewrite the constants into the user block data area. The program uses the

STDIO window to display the voltage that is being monitored.

NOTE: This sample program will overwrite the calibration constants set at the factory.

44 Fox (LP3500)

• AD_CALMA_CH.C—This sample program demonstrates how to recalibrate one A/D converter channel operating in the 4–20 mA current mode using two known currents to generate two coefficients, gain and offset, which are rewritten into the user block data area. The program uses the STDIO window to display the current that is being monitored.

NOTE: This sample program will overwrite the calibration constants set at the factory.

4.2.9 LCD/Keypad Module Sample Programs

Sample programs for the LCD/keypad module are described in Section C.8.

User’s Manual 45

4.3 LP3500 Libraries

One library directory provides the function calls that are used to develop applications for the LP3500.

• LP3500—libraries associated with features specific to the LP3500. The functions in the

LIB\Rabbit3000\LP35xx.LIB library are described in Section 4.4, “LP3500 Function

Calls.”

The LCD/keypad module functions are described in Section C.7. Other generic functions applicable to all devices based on the Rabbit 3000 microprocessor are described in the Dynamic C Function Reference Manual.

46 Fox (LP3500)

4.4 LP3500 Function Calls

4.4.1 LP3500 Power Modes

int devPowerSet(int devices, int state);

Sets individual devices to low-power or fully active states in the order listed below.

PARAMETERS

devices is a list of the following macros, which are OR'ed together, that will be af fected by the state parameter, e.g., RS232DEV|ADCDEV.

RS232DEV—RS-232 devices RS485DEV—RS-485 devices ADCDEV—ADS7870 A/D converter devices DISPDEV—LCD/keypad module ALLDEVICES—all devices

state

0 = shuts or powers down listed devices 1 = activates listed devices

Macro Description state = 0 state after Board Initialization

RS232DEV RS485DEV Transmitter is disabled 0

ADCDEV ADS7870 internal oscillator is turned off 0 DISPDEV LCD/keypad module is turned off. 0 ALLDEVICES All devices are disabled as described above —

Table E-1 provides further information about the power consumption associated with each section.

RETURN VALUE

0 if valid parameter

-1 otherwise

SEE ALSO

powerMode, anaInConfig, brdInit

Receivers and transmitters are disabled, RxE remains active

User’s Manual 47

int powerMode(int mode);

Sets the LP3500 operating power.

PARAMETERS

mode is the operating mode based on the following macros.

Mode Description

1 CCLK = PCLK = MainOsc = 7.3728 MHz

3 CCLK = PCLK = MainOsc/4 = 1.8423 MHz 4 CCLK = PCLK = MainOsc/6 = 1.2288 MHz 5 CCLK = PCLK = MainOsc/8 = 0.9216 MHz 6 CCLK = PCLK = 32.768 kHz 7 CCLK = PCLK = 32.768 kHz /2 = 16.384 kHz 8 CCLK = PCLK = 32.768 kHz/4 = 8.192 kHz 9 CCLK = PCLK = 32.768 kHz/8 = 4.096 kHz

10 CCLK = PCLK = 32.768 kHz/16 = 2.048 kHz

Typi cal Curre n t

Consumption

5–16 mA

2 mA

Debug

Capable?

Yes2 CCLK = PCLK = MainOsc/2 = 3.6864 MHz

NOTE: When using modes 6–10, be sure to call hitwd() explicitly since periodic inter-

rupts, which incorporate a virtual watchdog, are disabled in these modes.

Table 2 provides more specific information on the LP3500’s capabilities associated with these and other software-defined modes.

RETURN VALUE

0 if valid parameter

-1 if invalid parameter

SEE ALSO

devPowerSet, rdPowerState, setPowerState, VccMonitor

48 Fox (LP3500)

void serCommAlert(int lowpowermode, int

maxpowermode, int powersource, unsigned long timeout);

Use this function to poll Serial Port E for any activity or until a timeout occurs. The function call forces the LP3500 to enter the low-power mode using the battery for polling. Upon expiration of the timeout or the receipt of a serial byte, this function will enable the normal power mode and exit.

Use devPowerSet(ALLDEVICES, int state) before and after this function call to deactivate and activate all devices to operate at less power.

PARAMETERS

lowpowermode is the low-power mode setting to enter, usually 10 (see powerMode()) maxpowermode is the maximum operating power mode setting to enter, usually 1 (see power-

Mode())

powersource

1 = battery 2 = raw DC power

timeout is the timeout in seconds if no activity is detected on the RxE receiver line. Enter 0 for no timeout

SEE ALSO

powerMode, digInAlert, timedAlert, devPowerSet

void timedAlert(int lowpowermode, int maxpowermode,

int powersource, unsigned long timeout)

Use this function to poll the real-time clock until a timeout occurs. The function call forces the LP3500 to enter the low-power mode, disables the normal power source, and may enable the external battery for polling. Upon expiration of the timeout this function will enable the normal power mode and exit. If the normal power source is not available, the LP3500 will not be able to resume operation at the maximumpower mode, and may reset.

Use devPowerSet(ALLDEVICES, int state) before and after this function call to deactivate and activate all devices to operate at less power.

PARAMETERS

lowpowermode is the low-power mode setting to enter, usually 10 (see powerMode()) maxpowermode is the maximum operating power mode setting to enter, usually 1 (see power-

Mode())

powersource

1 = battery 2 = raw DC power

timeout is the timeout in seconds if an input is not received.

SEE ALSO

powerMode, digInAlert, serCommAlert, devPowerSet

User’s Manual 49

void digInAlert(int channel, int value, int

lowpowermode, int maxpowermode, int powersource, unsigned long timeout)

Use this function to poll a selected digital input until a timeout occurs. The function call forces the LP3500 to enter the low-power mode using the battery for polling. Upon activation of the channel or expiration of the timeout, this function will enable the normal power mode and exit.

Use devPowerSet(ALLDEVICES, int state) before and after this function call to deactivate and activate all devices to operate at less power.

PARAMETERS

channel is the digital input channel (IN00– IN15) to poll value is the input value of 0 or 1 to receive lowpowermode is the low-power mode setting to enter, usually 10 (see powerMode()) maxpowermode is the maximum operating power mode setting to enter, usually 1 (see power-

Mode())

powersource

1 = battery 2 = raw DC power

timeout is the timeout in seconds if an input is not received. Enter 0 for no timeout.

SEE ALSO

powerMode, serCommAlert, timedAlert, devPowerSet

int rdPowerState(void);

Determines if the LP3500 is running under battery power or a raw DC power source.

RETURN VALUE

0 if on raw DC power source 1 if on battery power

SEE ALSO

powerMode, setPowerState

int setPowerSource(int state);

Turns the linear regulator “off” or “on.”

PARAMETER

0 for normal power source 1 for battery

RETURN VALUE

0 if successful

-1 if raw DC power source is not available

-2 if battery is not available

SEE ALSO

powerMode, rdPowerState

50 Fox (LP3500)

4.4.2 Board Initialization

void brdInit (void);

Call this function at the beginning of your program. This function initializes the system I/O ports and loads all the A/D converter and D/A converter calibration constants from flash memory into SRAM for use by your program. If the LCD/keypad module is installed, this function will turn off LED DS1 to indicate that the initialization was successful.

Summary of Initialization

• LP3500 uses main oscillator

• LCD/keypad module buffer is disabled

• RS-485 serial communication is not enabled

• RS-232 serial communication is enabled

• Unused configurable inputs are tied and unused configurable outputs are set low

• Self-timed chip select is s e t to 109 ns

• If A/D converter chip is inst alled, chip is reset and SCLKD is set to 19,200 bps

• If A/D converter chip is inst alled, calibration constants are read

• If relay is installed, relay is set to NC or RESET position

The ports are initialized according to Table A-3.

User’s Manual 51

4.4.3 Digital I/O

void digOut(int channel, int value);

Sets the state of a digital output (OUT0–OUT9). Remember to call brdInit before executing this function. A runtime error will occur for the following conditions:

1. channel or value out of range.

2. brdInit was not executed before executing digOut.

PARAMETERS

channel is the output channel number (0–9). value is the output value (0 or 1).

SEE ALSO

brdInit, digIn, digBankOut

void digBankOut(int bank, int value);

Writes the state of a block of designated digital output channels. The first bank consists of OUT0– OUT7, the second bank consists of OUT8–OUT9.

A run-time error will occur for the following conditions:

1. channel or value out of range.

2. brdInit was not executed before executing digOut.

PARAMETER

bank is 0 for OUT0–OUT7, 1 for OUT8–OUT9. value is an 8-bit output value, where each bit corresponds to one channel. OUT0 and OUT8 are the

least significant bit 0.

RETURN VALUE

None.

SEE ALSO

brdInit, digOut, digBankIn

52 Fox (LP3500)

int digIn(int channel);

Reads the state of an input channel (IN00–IN15). A run-time error will occur for the following conditions:

1. channel out of range .

2. brdInit was not executed before executing digIn.

PARAMETER

channel is the input channel number (0–15)

RETURN VALUE

The logic state of the input (0 or 1).

SEE ALSO

brdInit, digOut, digBankIn

void digBankIn(int bank);

Reads the state of a block of designated digital input channels. The first bank consists of IN0–IN07, the second bank consists of IN08–IN15.

A run-time error will occur for the following conditions:

1. bank out of range.

2. brdInit was not executed before executing digIn.

PARAMETER

bank is 0 for IN00–IN07, 1 for IN08–IN15.

RETURN VALUE

An input value in the lower byte, where each bit corresponds to one channel. IN00 and IN08 are in the bit 0 place.

SEE ALSO

brdInit, digOut, digBankOut

User’s Manual 53

4.4.4 Serial Co mmunication

Library files included with Dynamic C provide a full range of serial communications support. The LIB\Rabbit3000\RS232.LIB library provides a set of circular-buffer-based serial functions. The LIB\Rabbit3000\PACKET.LIB library provides packet-based serial functions where packets can be delimited by the 9th bit, by transmission gaps, or with user-defined special characters. Both libraries provide blocking functions, which do not return until they are finished transmitting or receiving, and nonblocking functions, which must be called repeatedly until they are finished. For more information, see the Dynamic C User’s Manual and Rabbit’s Technical Note TN213, Rabbit 2000 Serial Port Software.

Use the following function calls with the LP3500.

int serMode(int mode);

User interface to set up LP3500 serial communication lines. Call thi s f unction after serXOpen(). Whether you are opening one or multiple serial po rts, this function must be executed after execut ing the last

serXOpen function AND before you start using any of the serial ports. This function is non-reentrant. If Mode 1 is selected, CTS/RTS flow control is exercised using the serBflowcontrolOn and

serBflowcontrolOff functions from the RS232.LIB library.

PARAMETER

mode is the defined serial port configuration.

Mode

0 RS-232, 3-wire RS-232, 3-wire RS-232, 3-wire RS-485 1 RS-232, 5-wire CTS/RTS RS-232, 3-wire RS-485

RETURN VALUE

0 if valid mode, 1 if not.

SEE ALSO

ser485Tx, ser485Rx

Serial Port

B C E F

54 Fox (LP3500)

void ser485Tx(void);

Enables the RS-485 transmitter. Transmitted data get echo'ed back into the receive data buffer. These echo'ed data could be used to know when to disable the transmitter by using one of the following methods:

Byte mode—disable the transmitter after the same byte that is transmitted is detected in the receive

data buffer.

Block data mode—disable the transmitter after the same number of bytes transmitted is detected in the

receive data buffer.

serMode() must be executed before running this function.

SEE ALSO

serMode, ser485Rx

void ser485Rx(void);

Disables the RS-485 transmitter. This puts the LP3500 in listen mode, which allows it to receive data from the RS-485 interface. serMode() must be executed before running this function.

SEE ALSO

serMode, ser485Tx

NOTE: The RS-485 transc ei ver us ed on the LP3500 is only capable of s upp ort in g a max -

imum baud rate of 64,000 bits/s. The baud rate is set by the Dynamic C macro. For example, add the following line on the

Options > Project Options to set a baud rate of 57,600 bits/s, then click OK.

Defines tab in the Dynamic C

_485BAUD

_485BAUD=57600

User’s Manual 55

4.4.5 A/D Converter Inputs

The functions in this section apply only to the LP3500 model.

unsigned int anaInConfig(unsigned int

instructionbyte, unsigned int cmd, long baud);

Use this function to configure the ADS7870 A/D converter. This function will address the ADS7870 in Register Mode only, and will report an error if you try to use it in Direct Mod e. Refer t o AD S787 0 sp ecification for proper addressing and commands.

ADS7870 Signal ADS7870 State LP3500 Function/State

LN0 Input AIN0 LN1 Input AIN1 LN2 Input AIN2 LN3 Input AIN3 LN4 Input AIN4 LN5 Input AIN5 LN6 Input AIN6 LN7 Input AIN7

/RESET Input Board reset device

RISE/FALL Input Tied up for SCLK active on rising edge

PIO_0 Input Pulled down unless driven by serial interface connection PIO_1 Input Pulled down unless driven by serial interface connection PIO_2 Input Pulled down unless driven by serial interface connection PIO_3 Input Pulled up unless driven by Vcc monitor

CONVERT Input Pulled down, not used

BUSY Output PF1 pulled down; 1 state converter is busy

CCLKCNTRL Input Tied down; 0 state sets CCLK as input

CCLK Input Tied down; external conversion clock SCLK Input PF0; serial data transfer clock

SDI Input PC0; 3-wire mode for serial data input

SDO Output PC1; serial data output /CS driven

/CS Input PF3 pulled up; active-low enables serial interface

BUFIN Input Tied down; reference buffer amplifier

56 Fox (LP3500)

PARAMETERS

instructionbyte will initiate a read or write operation at 8 or 16 bits on the designated register address, for example:

checkid = anaInConfig(0x5F, 0, 9600); // read ID and set baud rate

cmd is the command data that configure the registers addressed by the instruction byte. Enter 0 if per-

forming a read operation.

i = anaInConfig(0x07, 0x3a, 0); // write ref/osc reg and enable

baud is the serial clock transfer rate of 9600 to 57,600 bps. baud must be set on the first call to this

function. Enter 0 in this parameter thereafter.

anaInConfig(0x00, 0x00, 9600); // resets device and sets baud

RETURN VALUE

0 on write operations, data value on read operations.

SEE ALSO

anaInDriver, anaIn, brdInit

User’s Manual 57

unsigned int anaInDriver(unsigned int cmd,

unsigned int len);

Reads the voltage of an analog input channel by serial-clocking an 8-bit command to the ADS7870 device by its Direct Mode method. The conversion begins as soon as the last data bit is transferred.

An exception error will occur if Direct Mode bit D7 is not set.

PARAMETER

cmd contains a gain code and a channel code as follows.

D7—1; D6–D4—Gain Code; D3–D0—Channel Code

Use the following calculation and the tables below to determine cmd:

cmd = 0x80 | (gain_code*16) + channel_code

Channel Code

0 +AIN0 -AIN1 8 AIN0 AIN0 1 +AIN2 -AIN3 9 AIN1 AIN1 2 +AIN4 -AIN5 10 AIN2 AIN2 3 +AIN6 -AIN7 11 AIN3 AIN3 4 Reserved 12 AIN4 Reserved 5 Reserved 13 AIN5 Reserved 6 Reserved 14 AIN6 Reserved 7 Reserved 15 AIN7 Reserved

Gain Code Multiplier

0 1 0–20 V 1 2 0–10 V 2 4 0–5 V 3 5 0–4 V 4 8 0–2.5 V 5 10 0–2 V 6 16 0–1.25 V 7 20 0–1 V

Differential Input Lines

Channel Code

Voltage

Range

Single-Ended

Input Lines

4–20 mA

Lines

* Negative input is ground.

len, the output bit length, is always 12 bits.

58 Fox (LP3500)

RETURN VALUE

A value corresponding to the voltage on the analog input channel, which will be:

0–2047 for 11-bit A/D conversions (bit 12 for sign)

-1 for overflow

SEE ALSO

anaInConfig, anaIn

User’s Manual 59

int anaIn(unsigned int channel, int opmode,

int gaincode);

Reads the value of an analog input channel using the direct method of addressing the ADS7870 A/D converter.

PARAMETERS

channel is the analog input channel number (0 to 7) corresponding to AIN0–AIN7 opmode is the mode of operation:

SINGLE—single-ended input line DIFF—differential input li ne mAMP—milliamp input line

channel SINGLE DIFF mAMP

0 +AIN0 +AIN0 -AIN1 +AIN0 1 +AIN1 — +AIN1 2 +AIN2 +AIN2 -AIN3 +AIN2 3 +AIN3 — +AIN3 4 +AIN4 +AIN4 -AIN5 — 5 +AIN5 — — 6 +AIN6 +AIN6 -AIN7 — 7 +AIN7 — —

gaincode is the gain code of 0 to 7:

Gain Code

0 0–20 V 1 0–10 V 2 0–5 V 3 0–4 V 4 0–2.5 V 5 0–2 V 6 0–1.25 V 7 0–1 V

RETURN VALUE

A value corresponding to the voltage on the analog input channel, which will be:

0–2047 for 11-bit A/D conversions (signed 12th bit) ADOVERFLOW (defined macro = -4096) if overflow or out of range

SEE ALSO

anaIn, anaInConfig, anaInDriver

Voltage

Range

60 Fox (LP3500)

int anaInCalib(int channel, int opmode,

int gaincode, int value1, float volts1, int value2, float volts2);

Calibrates the response of the A/D converter channel as a linear function using the two conversi on poi nts provided. Four values are calculated and placed into global table _adcCalib to be stored later store into simulated EEPROM using the function anaInEEWr(). Each channel will have the following information:

a linear constant, a voltage offset, a calculation gain code used to calculate calibrations, and a user gain code to set voltage range (defaults to the calculation gain code).

NOTE: Vcc monitoring is disabled when anaInCalib is running.

PARAMETERS

channel is the analog input channel number (0 to 7) corresponding to AIN0–AIN7 opmode is the mode of operation:

SINGLE—single-ended input line DIFF—differential input li ne mAMP—milliamp input line

channel SINGLE DIFF mAMP

0 +AIN0 +AIN0 -AIN1 +AIN0 1 +AIN1 — +AIN1 2 +AIN2 +AIN2 -AIN3 +AIN2 3 +AIN3 — +AIN3 4 +AIN4 +AIN4 -AIN5 — 5 +AIN5 — — 6 +AIN6 +AIN6 -AIN7 — 7 +AIN7 — —

User’s Manual 61

gaincode is the gain code of 0 to 7:

Gain Code

Voltage

Range

0 0–20 V 1 0–10 V 2 0–5 V 3 0–4 V 4 0–2.5 V 5 0–2 V 6 0–1.25 V 7 0–1 V

value1 is the first A/D converter channel value (0–2047). volts1 is the voltage or current corresponding to the first A/D converter channel value (0 to +10 V or

4to 20 mA).

value2 is the second A/D converter channel value (0–2047). volts2 is the voltage or current corresponding to the first A/D converter channel value (0 to +10 V or

4to 20 mA).

RETURN VALUE

0 if successful.

-1 if not able to make calibration constants.

SEE ALSO

anaIn, anaInVolts, anaInmAmps, anaInDiff, anaInSetRange, anaInVoltXGain, anaInCalib, brdInit

62 Fox (LP3500)

float anaInVolts(unsigned int channel, unsigned int

gaincode);

Reads the state of a single-ended analog in put channel and uses the previously set calibration constants to convert it to volts.

PARAMETER

channel is the channel number (0–7):

Channel Code

* Negative input is ground.

gaincode is the gain code of 0 to 7.

Gain Code

Single-Ended

Input Lines

0 +AIN0 1 +AIN1 2 +AIN2 3 +AIN3 4 +AIN4 5 +AIN5 6 +AIN6 7 +AIN7

Voltage

Range

0 0–20 V 1 0–10 V

2 0–5 V 3 0–4 V 4 0–2.5 V 5 0–2 V 6 0–1.25 V 7 0–1 V

RETURN VALUE

A voltage value corresponding to the voltage on the analog input channel. ADOVERFLOW (defined macro = -4096) if overflow or out of range.

SEE ALSO

anaInCalib, anaIn, anaInmAmps, brdInit

User’s Manual 63

float anaInmAmps(unsigned int channel);

Reads the state of an analog input channel and uses the previous ly se t calibration constants to convert it to current.

PARAMETER

channel is 0–3:

Channel

4–20 mA

Input Lines

0 AIN0 1 AIN1 2 AIN2 3 AIN3

* Negative input is ground.

RETURN VALUE

A current value between 4.00 and 20.00 mA corresponding to the current on the analog input channel. ADOVERFLOW (defined macro = -4096) if overflow or out of range.

SEE ALSO

anaInCalib, anaIn, anaInVolts

64 Fox (LP3500)

float anaInDiff(unsigned int channel, unsigned int

gaincode);

Reads the state of a differential analog input channel and uses the previously set calibration constants to convert it to volts.

PARAMETER

channel is the channel number (0, 2, 4, 6):

Channel

gaincode is the gain code of 0 to 7.

Gain Code

Differential

Input Lines

0 +AIN0 -AIN1 2 +AIN2 -AIN3 4 +AIN4 -AIN5 6 +AIN6 -AIN7

Voltage

Range

0 0–20 V 1 0–10 V 2 0–5 V 3 0–4 V 4 0–2.5 V 5 0–2 V 6 0–1.25 V 7 0–1 V

RETURN VALUE

A voltage value corresponding to the voltage on the analog input channel. ADOVERFLOW (defined macro = -4096) if overflow or out of range.

SEE ALSO

anaInCalib, anaIn, anaInmAmps, brdInit

User’s Manual 65

int anaInEERd(unsigned int channel, int opmode,

unsigned int gaincode);

Reads the calibration constants, gain, and offset for an input based on its designated channel code position into global table _adcCalib. The constants are stored in the top 1K of the reserved user block memory area 0x1C00–0x1FFF.

NOTE: This function cannot be run in RAM.

PARAMETER

channel is the analog input channel number (0 to 7) corresponding to AIN0–AIN7. opmode is the mode of operation:

SINGLE—single-ended input line DIFF—differential input li ne mAMP—milliamp input line

channel SINGLE DIFF mAMP

0 +AIN0 +AIN0 -AIN1 +AIN0 1 +AIN1 — +AIN1 2 +AIN2 +AIN2 -AIN3 +AIN2 3 +AIN3 — +AIN3 4 +AIN4 +AIN4 -AIN5 — 5 +AIN5 — — 6 +AIN6 +AIN6 -AIN7 — 7 +AIN7 — —

ALLCHAN read all channels for selected opmode

gaincode is the gain code of 0 to 7. The gaincode parameter is ign ored when channel is ALLCHAN.

Gain Code

0 0–20 V 1 0–10 V 2 0–5 V 3 0–4 V 4 0–2.5 V 5 0–2 V 6 0–1.25 V 7 0–1 V

RETURN VALUE

0 if successful.

-1 if address is invalid or out of range.

SEE ALSO

anaInEEWr, anaInCalib

66 Fox (LP3500)

Voltage

Range

int anaInEEWr(unsigned int channel, int opmode

unsigned int gaincode);

Writes the calibration constants, gain, and offset for an input based on its designated channel code position from global table _adcCalib. The constants are stored in the top 1K of the reserved user block memory area 0x1C00–0x1FFF.

NOTE: This function cannot be run in RAM.

PARAMETER

channel is the analog input channel number (0 to 7) corresponding to AIN0–AIN7. opmode is the mode of operation:

SINGLE—single-ended input line DIFF—differential input li ne mAMP—milliamp input line

channel SINGLE DIFF mAMP

0 +AIN0 +AIN0 -AIN1 +AIN0 1 +AIN1 — +AIN1 2 +AIN2 +AIN2 -AIN3 +AIN2 3 +AIN3 — +AIN3 4 +AIN4 +AIN4 -AIN5 — 5 +AIN5 — — 6 +AIN6 +AIN6 -AIN7 — 7 +AIN7 — —

ALLCHAN read all channels for selected opmode

gaincode is the gain code of 0 to 7. The gaincode parameter is ign ored when channel is ALLCHAN.

Gain Code

0 0–20 V 1 0–10 V 2 0–5 V 3 0–4 V 4 0–2.5 V 5 0–2 V 6 0–1.25 V 7 0–1 V

RETURN VALUE

0 if successful.

-1 if address is invalid or out of range.

SEE ALSO

anaInEEWr, anaInCalib

User’s Manual 67

Voltage

Range

4.4.6 Vcc Monitoring (LP3500 only)

void VccMonitorInit(int state);

PIO3 on the ADS7870 A/D converter enables or disables Vcc monitoring. If monitoring is enabled, analog input channel AIN7 is not available.

PARAMETER

state

1 = enable Vcc monitor 0 = disable Vcc monitor

SEE ALSO

VccMonitor, anaInConfig, brdInit

float VccMonitor(void);

If Vcc monitoring is enabled, the Vcc level is read by the ADS7870 A/D converter and is converted to a voltage value.

RETURN VALUE

A voltage value corresponding to the voltage on the analog input channel.

SEE ALSO

VccMonitorInit, anaInVolts, brdInit

68 Fox (LP3500)

4.4.7 PWM Outp uts

The PWM functions in this section can be used to operate the analog outputs on the LP3500 model.

int pwmOutConfig(unsigned long frequency);

Sets the base frequency for the PWM pulses and enables the PWM driver on all four channels. The base frequency is the frequency without pulse spreading. Pulse spreading (see pwm_set) will increase the frequency by a factor of 4.

PARAMETERS

frequency is the frequency (in Hz).

RETURN VALUE

Actual frequency set. This will be the closest possible match to the requested frequency.

SEE ALSO

pwmOut

int pwmOut(unsigned int channel, float dutycycle);

Sets a voltage (0 to VDD on an analog output channel according to the percent duty cycle of the 1024clock-count cycle.)

PARAMETERS

channel is the output channel to write to (0–3). dutycycle is the percent duty (or on) cycle value of the 1024-clock-count cycle (i.e., 0.25).

RETURN VALUE

0 if successful

-1 if an invalid channel number is used

-2 if an invalid duty cycle was requested

SEE ALSO

pwmOutConfig

User’s Manual 69

4.5 Relay Output (LP3500 only)

int relayOut(int relay, int value)

A 10 ms low-to-high pulse sets the state of a relay. On power-up or brdInit() the relay contact will go to the normally closed (NC) RESET contact.

PARAMETERS

relay

0 = the one relay

value is a value used to connect the relay common contact:

0 = relay normally closed (NC or RESET) (Parallel Port PG5) 1 = relay normally open (NO or SET) (Parallel Port PG4)

RETURN VALUE

0 if successful

-1 if the normal power source is not available

70 Fox (LP3500)

APPENDIX A. LP3500 SPECIFICATIONS

Appendix A provides the specifications for the LP3500, and describes the conformal coating.

User’s Manual 71

A.1 Electrical and Mechanical Characteristics

Figure A-1 shows the mechanical dimensions for the LP3500.

0.120 dia

IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15

RN2

C15

C12

D11

C10 C13

RN1

R13

R16

R17

AIN0 AIN1 AIN2 AIN3

AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND

C16

C19

C20

(3.05)

D15 D17

D13

Q22

R30

C24

R18

C22

R23

C26

C33

R20

R25

R26

R22

D19

C36

D18

RP17

R57

Battery

R31

C29

BT1

R29

C37

OUT9

OUT8

OUT7

+K GND  485 + GND TxB RxB GND TxC RxC GND TxE RxE GND

D20

D21

C48

C43

C44

R32

C40

PWM1

PWM2

PWM0

D26

R37

D25

R42

R38

C53

C51

R34

R41

R39

C55

R40 C54

R36

C50

D22

VBAT

GND VIN GND

EXT

OUT1

OUT0

OUT2

OUT5

OUT4

OUT3

OUT6

D28

Q10

R43

R33

C61

R44

R45

C59

C60

RESET

GND

RELAY

D30

D34

Q17

Q16

Q13

D32

Q12

R47

R48

U10

R50 R49

U11

RP13

PROGRAM

PORT

C67

U12

D33Q14

C66

C64

U13

R51

C65

RP14

COM

R56

R55

C70

R58

Q20

R54

GND

(54)

(66)

2.11

DISPLAY

2.60

Please refer to the LP3500 footprint diagram later in this appendix for precise header locations.

0.29

(7.4)

0.059

(1.49)

2.84

(72)

3.65

(93)

3.65

(93)

(6.0)

0.245

0.45

(11)

Figure A-1. LP3500 Dimensions

72 Fox (LP3500)

T ableA-1 lists the electrical, mechanical, and environmental specifications for the LP3500.

Table A-1. LP3500 Specifications

Feature LP3500 LP3510

Microprocessor Rabbit 3000® at up to 7.4 MHz EMI Reduction Spectrum spreader for ultra-low EMI (radiated emissions) Flash Memory 512K (2 × 256K) 256K SRAM 512K 128K

Socketed 3 V lithium coin Panasonic CR2330, 265 mA·h,

Backup Battery

connection for user-supplied external battery

supports RTC and SRAM,

Keypad/Display

Digital Inputs 16: fully protected 0–36 V DC, can handle short spikes ±40 V

Digital Outputs

Relay Output 1 C-form, 1 A, 30 V DC None

10: 8 sink up to 200 mA each, 36 V DC max.;

2 source up to 200 mA each, 36 V DC max.

Supports optional LCD/keypad module with

7 keys and 122 × 32 graphic display

• Eight single-ended or four

differential inputs

• 1MΩ input impedance

• Sampling rate up to 200 samples/s

• Eight software-controlled ranges

from 0–1 V to 0–20 V DC

Single-Ended Inputs

• Resolution: 11 bits

Analog Inputs

None

• Accuracy: 8 bits

• 4 channels can be set individual ly for

4–20 mA with plug-in jumpers

• 1 channel has software-selectable

voltage-monitoring option

Differential Inputs

• Resolution: 12 bits

• Accuracy: 9 bits

Analog Outputs

User’s Manual 73

3 unfiltered pulse-width modulated, 1 kΩ output impedance

None

Table A-1. LP3500 Specifications (continued)

Feature LP3500 LP3510

6 shared high-speed, CMOS-compatible ports:

• 1 RS-485

Serial P orts

logic-level outputs; one RS-232 port needs to have wake-up capability

• 1 logic-level serial interface for optional add-ons

• 1 asynchronous clocked serial port dedicated for pro gramm in g

• 3 RS-232 (one 5-wire and one 3-wire or three 3-wire), jumper option for

Serial Rate Max. asynchronous baud rate = CLK/8 Real-Time Clock Yes

Timers

W atchdog/Supervisor Yes Pulse-Wi dth Modulators 10-bit free-running counter and four pulse-width regist ers

Power

Operating T emperatu re –40°C to +70°C Humidity 5% to 95%, noncondensing

Ten 8-bit timers (6 cascadable from the first),

one 10-bit timer with 2 match registers

3 V to 30 V DC

20 mA (max.) @ 7.4 MHz,

100 µA max. @ 2 kHz (with linear regulator turned off)

• 0.1" headers

I/O and misc. signals: one 1 × 25, two 1 × 17 headers Display: one 2 × 13 header

Connectors

• 2 mm headers

Programming Port: one 2 × 5 header Serial Interface: one 2 × 4 socket

• Screw-terminal headers

Relay: one 3-position screw-terminal header

Board Size

74 Fox (LP3500)

2.60" × 3.65" × 0.45"

(66 mm × 93 mm × 11 mm)

A.1.1 Exclusion Zone

It is recommended that you allow for an “exclusion zone” of 0.25" (6 mm) around the LP3500 in all directions when the LP3500 is incorporated into an assembly that includes other printed circuit boards. This “exclusion zone” that you keep free of other components and boards will allow for sufficient air flow, and will help to minimize any electrical or electromagnetic interference between adjacent boards. An “exclusion zone” of 0.12" (3 mm) is recommended below the LP3500. Figure A-2 shows this “exclusion zone.”

4.15

(105)

(18)

0.70

(18)

3.65

(93)

3.10

(79)

0.12

(3)

0.12

(3)

Exclusion

Zone

2.60

(66)

Figure A-2. LP3500 “Exclusion Zone”

When using the LP3500 with the Prototyping Board, do not install any components in the prototyping area on the Prototyping Board between the LP3500 and the Prototyping Board.

User’s Manual 75

A.1.2 Headers

The LP3500 uses 0.1" IDC headers at J1–J4 for physical connection to other boards. J5, the programming port, is a 2 × 5 header with a 2 mm pin spacing.

Figure A-3 shows the LP3500 footprint. These values are relative to the mounting hole.

3.040

(77.2)

2.640

(67.1)

0.100

(2.54)

PROGRAM

PORT

0.590

(15.0)

0.390

(9.9)

0.240

(6.1)

0.320

(8.1)

0.360

(9.1)

(1.0)

0.040

(5.1)

0.200

(20.0)

0.787

(45.7)

1.800

(46.2)

1.820

(55.9)

2.200

Figure A-3. User Board Footprint for LP3500

76 Fox (LP3500)

A.2 Conformal Coating

The areas around the 32 kHz real-time clock crystal oscillator has had the Dow Corning silicone-based 1-2620 conformal coating applied. The conformally coated area is shown in Figure A-4. The conformal coating protects these high-impedance circuits from the effects of moisture and contaminants over time.

Conformally coated area

OUT1

OUT0

OUT2

OUT4

OUT3

Q10

Y2 C61

Q12

R47

U10

D30

R48

R50 R49

Q16

Q13

U11

C66

RP13

PROGRAM

PORT

GND

RELAY

D34

Q17

D32

C67

U12

D33Q14

C64

U13

C70

R51

C65

Q20

RP14

COM

R56

R55

DISPLAY

R58

R54

GND

IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15

Q22

D13

C24

R18

D15 D17

C22

R23

R30

C26

R20

R22

D19

C36

D18

RP17

R57

Battery

R31

C29

BT1

C33

R29

R25

C37

R26

C16

RN2

C19

C15

C12

C20

D11

C10 C13

RN1

R13

R16

R17

AIN0 AIN1 AIN2 AIN3

AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND

OUT9

OUT8

OUT5

OUT7

OUT6

+K GND  485 + GND TxB RxB GND TxC RxC GND TxE RxE GND

R38

C53

R39

R40 C54

D28

D26

R43

R33

R41

R44

C55

R45

C59

C60

RESET

D20

R37

D25

D21

C48

C43

C44

R32

PWM1

PWM0

R42

C51

R34

R36

C50

C40

D22

PWM2

VBAT

GND VIN GND

EXT

Figure A-4. LP3500 Areas Receiving Conformal Coating

Any components in the conformally coated area may be replaced using standard soldering procedures for surface-mounted components. A new conformal coating should then be applied to offer continuing protection against the effects of moisture and contaminants.

NOTE: For more information on conformal coatings, refer to Technical Note 303, Con-

formal Coatings.

User’s Manual 77

A.3 Jumper Configurations

Figure A-5 shows the header locations used to configure the various LP3500 options via jumpers.

Top Side

JP6

JP11

JP4

JP5

CTS RTS

JP2

JP3

JP1

GND

OUT0

OUT1

OUT2

OUT3

Bottom Side

OUT8

OUT9

GND +KGND RxE TxE GND RxC TxC GND RxB TxB GND + 485 

OUT4

OUT5

OUT6

OUT7

JP7

JP12

JP8

JP13

JP9

420 mA

AIN3

AIN2

AIN1

AIN0

AIN6

AIN5

AIN4

AIN3

AIN2

AIN1

AIN0

PROGRAM

PORT

VBAT

VIN

EXT

GND

JP10

GND

AIN7

PWM2

PWM1

PWM0

Figure A-5. Location of LP3500 Configurable Positions

IN00

IN01

IN02

IN03

IN04

IN05

IN06

IN07

GND

IN08

IN09

IN10

IN11

IN12

IN13

IN14

IN15

78 Fox (LP3500)

Table A-2 lists the configuration options.

Table A-2. LP3500 Jumper Configurations

Header Description Pins Connected

None Voltage Option

1–2 AIN0 4–20 mA Option

A/D Converter Voltage/Current

Measurement Options

JP1 RxE RS-232/Logic Level Select

JP2 TxE RS-232/Logic Level Select

JP3 RxC RS-232/Logic Level Select

3–4 AIN1 4–20 mA Option

5–6 AIN2 4–20 mA Option

7–8 AIN3 4–20 mA Option

1–2 RS-232 Level

2–3 Logic Level

1–2 RS-232 Level

2–3 Logic Level

1–2 RS-232 Level

2–3 Logic Level

Factory

Default

JP4 TxC RS-232/Logic Level Select

JP5 RxB RS-232/Logic Level Select

JP6 TxB RS-232/Logic Level Select

JP7 SRA M Si z e

JP8 Flash Memory Size

JP9 Flash Memory Size

JP10 Flash Memory Bank Select

1–2 RS-232 Level

2–3 Logic Level

1–2 RS-232 Level

2–3 Logic Level

1–2 RS-232 Level

2–3 Logic Level 1–2 128K LP3510

2–3 512K LP3500 1–2 128K/256K 2–3 512K

1–2 128K/256K LP3500 2–3 512K

1–2 Normal Mode 2–3 Bank Mode

User’s Manual 79

Table A-2. LP3500 Jumper Configurations (continued)

Header Description Pins Connected

JP11 Manufacturing Use 1–2

JP12 Manufacturing Use 1–2

JP13 Manufacturing Use 1–2

NOTE: The jumper connections on header J3 are made using standard slip-on jumpers.

All other jumper connections except those across JP11 and JP12 are made using 0 Ω surface-mounted resistors. 390 Ω current-limiting resistors are used on JP11 and JP12.

Factory

Default

× × ×

80 Fox (LP3500)

A.4 Use of Rabbit 3000 Parallel Ports

Figure A-6 shows the Rabbit 3000 parallel ports.

PD0PD7

Port D

Port E

Port F

Port G

(+Serial Ports)

Misc. I/O

Flash

PE0PE1, PE4PE5 PE2PE3, PE6PE7

PF1PF2 PF0, PF3PF7

PG3, PG7

PG0PG2, PG4PG6

/RES_IN /IORD

/RESET, /IOWR, STATUS SMODE0 SMODE1

PC0, PC2, PC4

PC1, PC3, PC5

PG2, PG6

PG3, PG7

PC6

PB1, PC7, /RES

PA0PA7

Port A

Port C

(Serial Ports B,C & D)

Port G

(Serial Ports E & F)

Programming

Port

(Serial Port A)

RAM

PB0PB5

PB6PB7

Port B

ABBIT

3000

Real-Time Clock

Watchdog

11 Timers

Slave Port

Clock Doubler

Backup Battery

Support

Figure A-6. LP3500 Rabbit-Based Subsystems

Table A-3 lists the Rabbit 3000 parallel ports and their use in the LP3500.

Table A-3. Use of Rabbit 3000 Parallel Port s

Port I/O Signal Output Function State

PA0 Input IN08 PA1 Input IN09 PA2 Input IN10 PA3 Input IN11 PA4 Input IN12 PA5 Input IN12 PA6 Input IN14 PA7 Input IN15

Pulled up

Pulled up Pulled up

Pulled up

Pulled up Pulled up

Pulled up

Low when external power

PB0 Input Power Input Detect

source is connected; high for battery

PB1 Input CLKA

Pulled up when not driven by programming port

PB2 Input IN04 Pulled up

User’s Manual 81

Table A-3. Use of Rabbit 3000 Parallel Ports (continued)

Port I/O Signal Output Function State

PB3 Input IN05 PB4 Input IN06 PB5 Input IN07

Pulled up Pulled up

Pulled up

PB6 Output LCD Buffer Enable Inactive high PB7 Output Serial Device Select Inactive high PC0 Output TXD Serial Device Int.

Inactive high

Serial Port D

PC1 Input RXD Serial Device Int. Inactive high PC2 Output RTS/TxC RS-232

Inactive high

Serial Port C

PC3 Input CTS/RxC RS-232 Inactive high PC4 Output TxB RS-232

Inactive high

Serial Port B

PC5 Input RxB RS-232 Inactive high PC6 Output TxA Programming Port

Inactive high

Serial Port A

PC7 Input RxA Programmin g Port Inactive high PD0 Output OUT0 Inactive low PD1 Output OUT1 Inactive low PD2 Output OUT2 Inactive low PD3 Output OUT3 Inactive low PD4 Output OUT4 Inactive low PD5 Output OUT5 Inactive low PD6 Output OUT6 Inactive low PD7 Output OUT7 Inactive low PE0 Input IN00 Pulled up PE1 Input IN01 Pulled up PE2 Output OUT8 Inactive low PE3 Output OUT9 Inactive low PE4 Input IN02

Pulled up

PE5 Input IN03 Pulled up PE6 Output LCD/Keypad Module Reset Line Inactive high PE7 Output LCD/Keypad Module Device Select Inactive high

82 Fox (LP3500)

Table A-3. Use of Rabbit 3000 Parallel Ports (continued)

Port I/O Signal Output Function State

PF0 Output ADC Serial Clock Inactive high PF1 Input ADC Busy Inactive low PF2 Input Not used Pulled up PF3 Output ADC Device Select Inactive high PF4 Output PWM0 Inactive high PF5 Output PWM1 Inactive high PF6 Output PWM2 Inactive high

Low when external power

PF7 Output Power Enable Contr ol

PG0 Output RS-485 Transmit Enable Inactive low PG1 Output RS-232 Shutdown Control Inactive high

source is connected; high for battery

PG2 Output TxF R S-485

Inactive high

Serial Port F

PG3 Input RxF RS-485 Inactive high PG4 Output Relay Set Inactive low PG5 Output Relay Res e t Inactive low PG6 Output TxE RS-232

Inactive high

Serial Port E

PG7 Input RxE RS-232 Inactive high

User’s Manual 83

84 Fox (LP3500)

APPENDIX B. PROTOTYPING BOARD

Appendix B describes the features and accessories of the Prototyping Board included wit h the LP3500 Tool Kit, and explains the use of the Prototyping Board to demonstrate the LP3500 and to build prototypes of your own circuits.

The screw-terminal headers on the Prototyping Board facilitate access to the LP3500 connector pins, and the Prototyping Board is available for purchase separately.

User’s Manual 85

B.1 Mechanical Dimensions and Layout

Figure B-1 shows the mechanical dimensions and layout for the LP3500 Prototyping Board.

GND VIN GND VBAT EXT GND PWM2 PWM1 PWM0 GND AIN7 AIN6 AIN5 AIN4 AIN3 AIN2 AIN1 AIN0 GND

J23

IN15 IN14 IN13 IN12 IN11 IN10 IN09 IN08 IN07 IN06 IN05 IN04 IN03 IN02 IN01 IN00

J11

GND

VIN

J12

J13

J41

3 V VBAT

GND RxE TxE GND RxC TxC GND RxB TxB GND + 485  GND +K OUT9 OUT8 OUT7 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0

J22

J42

J21

VIN

GND

VIN

GND

J43

4.14

(105)

RN1

GND

VIN

(87)

3.41

GND

VIN

DS4 DS3 DS2 DS1

J44

PWR

Figure B-1. LP3500 Prototyping Board Dimensions

Table B-1 lists the electrical, mechanical, and environmental specifications for the Prototyping Board.

Table B-1. LP3500 Prototyping Board Specifications

Parameter Specification

Board Size 3.41" × 4.14" × 0.45" (87 mm × 105 mm × 11 mm) Operating T emperatu re –40°C to +70°C Humidity 5% to 95%, noncondensing Prototyping Area 2.2" × 3.4" (56 mm × 86 mm) throughhole, 0.1" spacing

86 Fox (LP3500)

B.2 Using the Prototyping Board

B.2.1 Interface to LP3500

The Prototyping Board serves as a convenient interface for the LP3500, extending the IDC headers to convenient screw-terminal connectors, and provides interfaces to the AC adapter included with the Tool Kit and to a user-supplied external battery.

Figure B-2 shows the pinouts for the Prototyping Board.

Digital

IN04

IN05

Inputs

IN06

IN07

IN08

IN09

IN10

IN11

IN12

IN13

IN14

IN15

IN15 IN14 IN13 IN12 IN11 IN10 IN09 IN08 IN07 IN06 IN05 IN04 IN03 IN02 IN01 IN00

J11

J22

J21 J23

GND

AIN0

AIN1

AIN2

AIN3

AIN4

AIN5

AIN6

AIN7

GND

PWM0

PWM1

PWM2

GND

VBAT EXT

GND

VIN

GND

GND VIN GND VBAT EXT GND PWM2 PWM1 PWM0 GND AIN7 AIN6 AIN5 AIN4 AIN3 AIN2 AIN1 AIN0 GND

Pushbutton

Analog

Inputs

PWM

Outputs

Power

Supply

Switches

RS-232

RS-485

Digital

Outputs

External

Battery

Connection

GND

RxE

TxE

GND

RxC/CTS

TxC/RTS

GND

RxB

TxB

GND

RS-485+

RS-485

GND

OUT9

OUT8

OUT7

OUT6

OUT5

OUT4

OUT3

OUT2

OUT1

OUT0

3 V VBAT

J12

J41 J42

J43

J44

PWR

Raw DC

Power

Input

IN00

IN01

IN02

IN03

DS4 DS3 DS2 DS1

LEDs

Figure B-2. LP3500 Prototyping Board Pinout

NOTE: The LP3500 must be plugged in to the Prototyping Board

as described in

Chapter 2, “Getting Started,” for these signals to be available.

User’s Manual 87

B.2.2 Demonstration Board

The Prototyping Board is actually both a demonstration board and a prototyping board. As a demonstration board, it can be used to demonstrate the functionality of the

LP3500 right out of the box without any modifications to either board. There are no jumpers or dip switches to configure or misconfigure on the Prototyping Board so that the initial setup is very straightforward.

The Prototyping Board comes with the basic components necessary to demonstrate the operation of the LP3500. Four LEDs (DS1–DS4) are connected to PD0–PD3, and four switches (S1–S4) are connected to PE0, PE1, PE4, and PE5 to demonstrate the i nterface to the Rabbit 3000 microprocessor.

NOTE: Before running sample programs based on the LP3500, you will have to plug in

the LP3500 to the Prototyping Board

as described in Chapter 2, “Getting Started.”

B.2.3 Prototyping Area

Small to medium cir cuit s can b e pro toty ped u sin g po int -

to-point wiring with 20 to 30 A WG wire on the prototyping area. Raw DC input, VIN, and GND lines surround the prototyping area.

The resistor pack located next to the pushbutton switches may be removed to disconnect the LEDs and pushbutton switches from the Prototyping Board circuits, giving your LP3500 exclusive access to what you may develop in the prototyping area.

+K and VIN are tied together by resistor R1 located beside header J44. Cut off R1 if you intend to supply a separate +K.

88 Fox (LP3500)

APPENDIX C. LCD/KEYPAD MODULE

An optional LCD/keypad is available for the LP3500. Appendix C describes the LCD/keypad module and provides the software calls to make full use of the LCD/keypad module.

C.1 Specifications

Two optional LCD/keypad modules—with or without a panel-mounted NEMA 4 waterresistant bezel—are available for use with the LP3500. They are shown in Figure C-1.

LCD/Keypad Modules

Figure C-1. LCD/Keypad Module Models

LCD/keypad modules sold prior to the launch of the LP3500 might not be voltagecompatible with the LP3500. Contact your Rabbit sales representative or your authorized distributor for further assistance in purchasing an LCD/keypad module.

Mounting hardware and a 127 mm (5") or 60 cm (24") extension cable are also available for the LCD/keypad module through your Rabbit sales representative or authorized distributor.

User’s Manual 89

Table C-1 lists the electrical, mechanical, and environmental specifications for the LCD/ keypad module.

Table C-1. LCD/Keypad Specifications

Parameter Specification

Board Size

Bezel Size

Temperature

2.60" × 3.00" × 0.75" (66 mm × 76 mm × 19 mm)

4.50" × 3.60" × 0.30" (114 mm × 91 mm × 7.6 mm)

Operating Range: 0°C to +50°C Storage Range: –40°C to +85°C

Humidity 5% to 95%, noncondensing Power Consumption

1.5 W maximum with backlight on

Connections Connects to header J9 (Display Interface) on LP3500 LCD Panel Size 122 × 32 graphic display Keypad 7-key keypad LEDs Seven user-programmabl e LEDs

* The backlight adds approximately 650 mW to the power consumption.

The LCD/keypad module has 0.1" IDC header sockets at J1, J2, and J3 for physical connection to other

0.100

(2.5)

boards or ribbon cables. Figure C-2 shows the LCD/keypad module footprint. These values are relative to one

of the mounting holes.

(15.4)

0.607

NOTE: All measurements are in

inches foll owed by millimeters enclosed in parenthes es. Al l di mensions have a manufacturing tolerance of ±0.01" (0.25 mm).

(40.6)

1.600

(19.5)

0.768

0.200

(5.1)

0.500

(12.7)

1.450

(36.8)

2.200

(55.9)

Figure C-2. User Board Footprint for

LCD/Keypad Module

90 Fox (LP3500)

C.2 Contrast Adjustment

Starting in 2005, LCD/keypad modules were factory-configured to optimize their contrast based on the voltage of the sy stem they would b e used in. Be s ure to select a K DU3V LCD/ keypad module for use with the LP 3500 — these modules operate at 3.3 V. You may adjust the contrast using the potent io met er at R2 as show n in Figure C-3. KDU5V LCD/keypad modules configured for 5 V may be used with the LP3500, but the backlight will be dim.

LCD/Keypad Module Jumper Configurations

Header

Description

2.8 V

Pins

Connected

12

Factory

Default

Contrast

Adjustment

OTHER

3.3 V n.c. = 5 V

KP1

3.3 V

5 V

LCD1

R25

R26

R11

LP3500

2.8 V

R13

R17

C17

R14

R20

R23

R22

RN1

34

n.c.

JP1

R4 R5

C11

R10

R19

C14

R24

C15

C16

C10

CR1

C13

C12

R12

R15

R18

R16

R21

DISPLAY

BOARD

Part No. 101-0541

Figure C-3. LCD/Keypad Module Contrast Adjustment

You can set the contrast on the LCD display of pre-2005 LCD/keypad modules by adjusting

the potentiometer at R 2 or by se ttin g th e vol ta ge f or 2 .8 V b y c o nne cti ng t he ju m pe r across pins 1–2 on header J5 as shown in Figure C-3. Only one of these two options is available on these older LCD/keypad modules.

NOTE: Older LCD/keypad modules that do not have a header at J5 or a contrast adjust-

ment potentiometer at R2 are limited to operate only at 5 V, and will not work with the LP3500. The older LCD/keypad modules are no longer being sold.

User’s Manual 91

C.3 Keypad Labeling

The keypad may be labeled according to your needs. A template is provided in Figure C-4 to allow you to design your own keypad label insert.

1.10

(28)

2.35

(60)

Figure C-4. Keypad Template

To replace the keypad legend, remove the old legend and insert your new legend prepared according to the template in Figure C-4. The keypad legend is located under the blue keypad matte, and is accessible from the left only as shown in Figure C-5.

Keypad label is located under the blue keypad matte.

Figure C-5. Removing and Inserting Keypad Label

The sample program KEYBASIC.C in the 122x32_1x7 folder in SAMPLES\LCD_KEYPAD shows how to reconfigure the keypad for different applications.

92 Fox (LP3500)

C.4 Header Pinouts

Figure C-6 shows the pinouts for the LCD/keypad module.

DB6B

DB4B

DB2B

DB0B

A1B

A3B

GND

LED7

LED5

LED3

LED1

/RES

VCC

LED4

LED7

GND

/CS

LED2

LED5

LED6

LED4

+5BKLT

LED3

LED1

LED2

/RES

/CS

VCC

+5BKLT

GND

DB7B

DB6B

DB4B

DB7B

DB5B

DB3B

DB2B

DB3B

DB1B

DB0B

A1B

A0B

DB1B

A0B

A2B

A3B

A2B

GND

LED6

GND

Figure C-6. LCD/Keypad Module Pinouts

NOTE: Note that there are no connections from headers J2 and J3 of the LCD/keypad

module to the LP3500. These headers interface to the keypad and to the LEDs on the LCD/keypad module, and need to be interfaced to the digital I/O on the LP3500 if you need keypad or LED functionality. The LEDs may be driven by an active signal either in software or in hardware.

C.4.1 I/O Address Assignments

The LCD and keypad on the LCD/keypad module are addressed by the /CS strobe as explained in Table C-2.

Table C-2. LCD/Keypad Module Address Assignment

Address Function

0xE000 Device select base address (/CS) 0xExx0–0xExx7 LCD control 0xExx8 LED enable 0xExx9 Not used 0xExxA 7-key keypad 0xExxB (bits 0–6) 7- LED driver 0xExxB (bit 7) LCD backlight on/off 0xExxC–ExxF Not used

User’s Manual 93

C.5 Bezel-Mount Installation

This section describes and illustrates how to bezel-mount the LCD/keypad module. Follow these steps for bezel-mount installation.

1. Cut mounting holes in the mounting panel in accordance with the recommended dimensions in Figure C-7, then use the bezel faceplate to mount the LCD/keypad module onto the panel.

0.125 D, 4x

(3)

CUTOUT

0.230

(5.8)

2.870

(72.9)

3.100

(78.8)

Figure C-7. Recommended Cutout Dimensions

3.400

(3.3)

0.130

(86.4)

2. Carefully “drop in” the LCD/keypad module with the bezel and gasket attached.

94 Fox (LP3500)

Rabbit Fox LP3500 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TABLE OF CONTENTS

1. INTRODUCTION

1.1 LP3500 Description

1.2 LP3500 Features

1.3 Optional Add-Ons

1.4 Development and Evaluation Tools

1.4.1 Tool Kit

1.4.2 Software

1.5 CE Compliance

1.5.1 Design Guidelines

1.5.2 Interfacing the LP3500 to Other Devices

2. GETTING S TARTED

2.1 LP3500 Connections

2.2 Remove Battery Tab

2.3 Installing Dynamic C

2.4 St arting Dynamic C

2.5 PONG.C

2.6 Where Do I Go From Here?

3. SUBSYSTEMS

3.1 LP3500 Pinouts

3.1.1 Headers and Screw Terminals

3.2 Power Modes

3.2.1 Setting the Power-Save Mode

3.2.2 Operating in the Power-Save Mode

3.2.3 Resuming Normal-Power or Low-Power Operation

3.3 Digital I/O

3.3.1 Digital Inputs

3.3.2 Digital Outputs

3.4 Serial Communication

3.4.1 RS-232

3.4.2 RS-485

3.4.3 Serial Interface P ort

3.4.4 Programming Port

3.5 Display Interface

3.6 A/D Converter Inputs (LP3500 only)

3.7 PWM Outputs

3.8 Relay Output Circuit (LP3500 only)

3.9 Serial Programming Cable

3.9.1 Changing Between Program Mode and Run Mode

3.9.2 Standalone Operation of the LP3500

3.10 Other Hardware

3.10.1 Spectrum Spreader

3.11 Memory

3.11.1 SRAM

3.11.2 Flash Memory

4. SOFTWARE

4.1 Upgrading Dynamic C

4.1.1 Patches and Bug Fixes

4.1.2 Extras

4.2 Sample Programs

4.2.1 Power Modes

4.2.2 Digital I/O

4.2.3 Serial Communication

4.2.4 A/D Converter Inputs

4.2.5 PWM Outputs

4.2.6 Relay Output

4.2.7 Vcc Monitoring

4.2.8 LP3500 Calibration

4.2.9 LCD/Keypad Module Sample Programs

4.3 LP3500 Libraries

4.4 LP3500 Function Calls

4.4.1 LP3500 Power Modes

4.4.2 Board Initialization

4.4.3 Digital I/O

4.4.4 Serial Co mmunication

4.4.5 A/D Converter Inputs

4.4.6 Vcc Monitoring (LP3500 only)

4.4.7 PWM Outp uts

4.5 Relay Output (LP3500 only)

APPENDIX A. LP3500 SPECIFICATIONS

A.1 Electrical and Mechanical Characteristics

A.1.1 Exclusion Zone

A.1.2 Headers

A.2 Conformal Coating

A.3 Jumper Configurations

A.4 Use of Rabbit 3000 Parallel Ports