Rabbit Fox LP3500 User Manual

Fox (LP3500)
C-Programmable Single -Board Compu ter
User’s Manual
019–0111 • 081121–L
Fox (LP3500) User’s Manual
©2002–2008 Digi International Inc. • All rights res erved.
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)

TABLE OF CONTENTS

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
I
N 1 1
I
N 1 0
I N 0
9
I N 0
8 G N D
I
N 0 7
I N 0
6
I N 0
5
I
N 0 4 I
N 0 3
J
I N
1
0 2
I N 0
1
J 1
3
I N 0
0
J41
G N D
J3
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
I
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
J4
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
J2
VIN
GND
VIN
GND
R1
J44
J43
Universal
AC Adapter
S1
S2
S3
S4
RN1
G
V
N
I
N
D
G
V
N
I N
D
1 S D
2 S D
3 S
D
4 S D
D1
R W P
J5
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
J4
J1
IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07
RN2
C15
C12
C20
D5
D2
C2
RN1
C3
R7
R9
R1
AIN0 AIN1 AIN2 AIN3
D11
D13
D7
R23
C6
D4
Q22
C8
D8
R30
C24
C10 C13
R13
R6
R16
R18
R17
C26
C33
R29
R20
R25
J3
C37
R26
R22
PWM0
GND
IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15
D1
AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND
OUT9
OUT8
OUT7
D19
C16
U1
C36
C19
D18
D15 D17
RP17
Battery
R57
R31
U3
C22
C29
C43
BT1
C44
C50
Y1
R32
C40
D22
PWM
PWM2
VBAT
GND VIN GND
1
EXT
+K GND  485 + GND TxB RxB GND TxC RxC GND TxE RxE GND
D20
D26
R37
D25
Q8
Q5
R42
D21
C48
R34
U8
R40 C54
R36
J2
R43
R33
R38
Q6
C53
C51
R41
R39
R44
C55
R45
C59
R48
C60
U10
U9
RP13
S1
RESET
R50
R49
J5
PROGRAM
PORT
OUT0
OUT2
OUT5
OUT4
OUT3
OUT6
D28
Q10
Y2
C61
Q12
R47
U11
C66
RP14
GND
1
J8
RELAY
D30
D34
Q17
Q16
K1
Q13
D32
C67
U12
D33Q14
J6
C64
U13
C70
R51
R58
C65
Q20
R54
GND
NC
COM
NO
R56
R55
J9
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
U7
C
RESET
6 3
Q19
Q18
S2
U6
R53 R52
R46
Q21
C
C
RP11
6
6
9
8
RP12
Q15
D31
LP3500
R27
C38
R21
R
R28
R19
2 4
D3
C27
C34
J
R15
P
R8
1 0
R5
C
R14
4
J
1
C9
P 9
C14
RP1
D9
C 7
RP2
C 5
C4
C1
J P 1
2
RP4
RP3
VCC
R4
R12
GND
R3
R11
J
+K
R2
R10
P
C
3
07
815
IN
1 8
J P 1
J P
2
C 4
2
U2
J
C17
C23
P
8
D6
D12
D10
J
J
P
P
7 1 1
C30
D16
R P 9
C28
R P
RP10
8
D14
R
C
Q7
Q11
5
J
4
J
9
9
P
P
C25
5
6
J P 4
C 3
1
Q
D23
Q4
9
Q3
R35
D29
D27
D24
J23
IN 1 5 IN
1
J
4
1
IN
1
1 3 IN
1 2 IN
1 1
IN
1 0 IN
0 9 IN
0 8
G
V
G
N
IN
D
N
J
D
1
IN
2
0 7 IN
0 6 IN
0 5 IN
J1
0 4 IN
0 3 IN
J
1
0 2 IN
0 1 IN
J 1
3
0 0 G
J41
N D
J3
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
J4
J42
J2
J2
J4
J43
VIN
GND
VIN
GND
R1
D
G
V
N
IN
D
D1
R
W
J44
P
J5
GND VIN GND VBAT EXT GND PWM2 PWM1 PWM0 GND AIN7 AIN6 AIN5 AIN4 AIN3 AIN2 AIN1 AIN0 GND
S4
J21
J22
S3
G
V
N
IN
1 S
D
2 S
D
3 S D
4 S D
S1
S2
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
J5
PROGRAM
PORT
PC COM port
Colored edge
To
Programming
Cable
PROG
1 5
I
N 1
4
I
N 1 3
I
N 1
2
I
N 1
1
I
N 1 0
I
N 0
9
IN
0
8
G
N
J
D
1 2
I
N 0 7
I
N 0 6
I
N 0 5
I
N
0
4
I
N 0 3
J
I
N
1
0 2
IN 0 1
J 1
I
3
N 0 0
N
D
3 V VBAT
G
J41
J3
GND RxE TxE GND RxC TxC GND RxB TxB GND + 485  GND +K OUT9 OUT8 OUT7 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0
D3
R15
R8
J
1
1
R5
R14
C9
C14
RP1
D9
C
7
RP2
C
5
C17
C4
C1
G
V
N
I
N
D
VCC
R4
GND
R3
+K
R2
07
815
IN
J P 1
J
P
2
C23
D6
D12
D10
J P 1
2
RP4
C30
RP3
D16
C28
P
R12
8
D14
R11
J
J
J
P
R10
P
P
C
C25
5
3
6
1
8
J P
4
R35
C 3
1
J4
J42
J23
I
N
X
Do not connect
AC adapter to
VBAT terminal
J5
Figure 4. Programming Cable and Power Supply Connections
Red
DIAG
R27
C38
R21
R
R28
R19
J22
2 4
J2
C27
C34
J
P 1 0
C 4
J
1
P
9
C 4 2
U2
J P
8
J
J
P
P
7
1
1
R P 9
R
R
C
5
4
9
9
D23
Q4
Q3
GND
VIN
J43
D24Q7D27
VIN
GND
RP10
Q11
Q
9
D29
R1
GND VIN GND VBAT EXT GND PWM2 PWM1 PWM0 GND AIN7 AIN6 AIN5 AIN4 AIN3 AIN2 AIN1 AIN0 GND
/RESET
TP2
U7
J21
RESET
VIN
GND
S2
U6
R46
Q21
RP11
RP12
Q15
D31
D1
J44
J5
S3
S4
PORT
PROGRAM
C 6
3
Q19
Q18
R53
R52
G
V
N
I
N
D
C
C
6
6
9
8 G
V
N
I
N
D
1 S
D 2 S
D 3 S
D
4
S
D
R
W
P
shrink wrap
S1
S2
RN1
Remove slot cover,
1
insert tab into slot
Assemble
AC Adapter
Snap plug into place
2
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
J4
J1
IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15
RN2
C15
C12
D5
D11
D7
C6
D4
D2
C8
D8
C10 C13
C2
RN1
C3
R6
R17
R7
R9
D1
R1
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
Q8
Q5
R42
D21
R38
C48
Q6
C53
C51
R34
R41
R39
R44
U3
C43
C44
R32
C40
PWM1
C55
U8
R40 C54
R36
C50
Y1
D22
VBAT
EXT
GND VIN GND
J2
PWM2
C16
U1
C19
D15 D17
C20
C22
C29
D13
R23
Q22
R30
C24
R13
R16
R18
C26
C33
R20
R25
J3
R26
R22
RESET switch
OUT0
OUT2
OUT5
OUT4
OUT3
GND
J8
RELAY
D30
D28
D34
Q17
Q16
Q10
R43
U9
K1
R33
Q13
D32
Y2
C61
Q12
U12
R47
R45
D33Q14
U11
J6
C66
C59
R48
C60
RESET
C64
U13
U10
RP13
S1
C65
R50 R49
RP14
J5
PROGRAM
PORT
NC
COM
NO
R56
R55
C69
C67
J9
C70
R51
R58
Q20
R54
D6
D4
D2
D0
A1
A3
GND
DISPLAY
DPRST
VDISP
GND
GND
OUT0
OUT1
OUT2
OUT3
D31
D29
Q15
Q11
RP12
RP11
C68
D7
D5
D3
D1
A0
A2
GND
GND
R52
R53
Q18
DISP
C63
TP1
Q21
VRAM
J6
R46
RP15
S2
Q19
RESET
RESET
TP2
TP2
/RESET
/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
IN
815
U4
JP6
JP5
RP8
C28
RP9
JP11
JP7
JP8
U2
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
D6
C23
C17
C71
IN DR OUT
D9
JP13
C21
C14
R14
R60
R15
420 mA
C27
R19
R21
AIN3
AIN2
AIN6
AIN5
AIN4
AIN3
AIN2
IN00
R2
+K
R3
GND
IN01
R4
VCC
IN02
IN03
IN04
IN05
IN06
IN07
GND
C1
C4
IN08
IN09
C5
IN10
RP2
C7
IN11
RP1
IN12
C9
R5
IN13
R8
IN14
D3
IN15
AIN1
AIN0
AIN1
AIN0
Q9
RP10
OUT6
D24Q7D27
OUT7
OUT8
D23
VIN
GND
GND +KGND RxE TxE GND RxC TxC GND RxB TxB GND + 485 
OUT9
Q3
Q4
C49
R59
C52
VBAT
EXT
GND
GND
PWM2
R35
C39
C42
C41
R28
PWM1
OUT4
OUT5
U5
U6
U7
U7
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
NC
COM
NO
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
J2
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
to
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
GND
VIN
GND
PROGRAM
PORT
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
J5
J2
RESET
S1
Serial
Interface
Digital Inputs
IN09
IN08
GND
IN07
J6
IN06
IN05
IN04
IN03
IN02
IN01
J4
Battery
IN00
J1
25
GND
24
RxE
23
TxE
22
GND
21
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
K
Digital
Outputs
20 19 18 17 16 15 14 13 12
OUT9
11
OUT8
10
OUT7
9
OUT6
8
OUT5
7
OUT4
6
OUT3
5
OUT2
4
OUT1
3
OUT0
2 1
GND
J8
GND
Display Interface
DISPLAY
J9
NO
J8
RELAY
NC
COM
NC
NO
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
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
1
4 1.2288 MHz
32.768 kHz
5 0.9216 MHz
6
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 resistor as shown in Figure 9.
Vcc
Factory
+K
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)
K
Current
Flow
1 MW
SOURCING OUTPUTS (OUT8OUT9)
Vcc
K
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 resistor on the Prototyp-
GND
VIN
ing Board (R1) ties +K to VIN, the raw DC input voltage. Figure 12 shows the location of
D1
J5
R1
DS4 DS3 DS2 DS1
PWR
this 0 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.
R1
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
A
B 3-wire RS-232 J4 No
C
D
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 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
J1
AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND
PWM0
PWM1
PWM2
VBAT
EXT
GND VIN GND
J2
PROGRAM
PORT
GND
AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND
PWM0
PWM1
PWM2
VBAT
EXT
GND VIN GND
J2
PROGRAM
PORT
R1
AIN0 AIN1 AIN2 AIN3
J3
Battery
RESET
S1
J5
DISPLAY
R1
AIN0 AIN1 AIN2 AIN3
J3
NO
J4
Ground recommended
J4
Rx
4
+K GND  485 + GND TxB RxB GND TxC RxC GND TxE RxE GND
OUT9
OUT8
OUT7
OUT6
OUT5
OUT4
OUT3
OUT2
OUT1
OUT0
GND
J8
RELAY
NC
COM
IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15
J1
J4
3
2
1
13
2
TxB
GND
485+
485
+K
OUT9
OU
Battery
+K GND  485 + GND TxB RxB GND TxC RxC GND TxE RxE GND
OUT9
OUT8
OUT7
OUT6
RESET
S1
J5
OUT5
OUT4
OUT3
OUT2
OUT1
OUT0
GND
GND
DISPLAY
J8
RELAY
NO
NC
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
J6
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.
J9
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
R
IN
953 kW
ADC
Jumper pins to configure for 420 mA
AGND
J3
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 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
5
-
10 nF
7
8
9
+
10
5.1 W
5.1 W
10 nF
1
+
4
3
2
-
6
NO
COM
NC
J8
1
2
3
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.
J4
J1
IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15
RN2
C6
D4
D2
C10 C13
C2
RN1
C3
R6
R7
R9
D1
R1
AIN0 AIN1 AIN2 AIN3
AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND
C15
C12
D5
D11
D7
C8
D8
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
U1
D15 D17
C22
D13
R23
Q22
R30
C24
R18
C26
R20
J3
R22
C36
RP17
R57
Battery
R31
C29
C33
R29
R25
C37
R26
D25
Q8
Q5
R42
D21
D18
R38
C48
Q6 C53
C51
R34
R41
R39
C55
U3
U8
C43
BT1
C44
R40 C54
R36
C50
Y1
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
U9
S1
RESET
J5
J2
OUT1
OUT0
OUT2
OUT3
GND
D30
D34
Q17
Q16
K1
Q13
D32
Q12
U12
R47
D33Q14
U11
J6
C66
R48
C64
U13
U10
RP13
C65
R50 R49
RP14
PROG
PROGRAM
PORT
Programming
C67
R51
DIAG
C70
R58
Q20
R54
J8
RELAY
R56
R55
J9
DISPLAY
GND
Cable
NC
COM
NO
J4
J1
IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15
RN2
C6
D4
D2
C2
RN1
C3
R6
R7
R9
D1
R1
AIN0 AIN1 AIN2 AIN3
AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND
C10 C13
C16
C19
C15
C12
D5
D11
D7
C8
D8
R13
R16
R17
U1
C36
D15 D17
RP17
Battery
C20
C22
C29
D13
R23
Q22
R30
C24
R18
C26
C33
R29
R20
R25
J3
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
Q8
Q5
R42
D21
D18
R38
C48
Q6
C53
R57
C51
R31
R34
R41
R39
C55
U3
U8
C43
BT1
C44
R40 C54
R36
C50
Y1
R32
C40
D22
PWM1
PWM2
PWM0
VBAT
GND VIN GND
EXT
Power
OUT5
OUT6
R44
U9
J2
OUT4
OUT3
D28
Q10
R43
R33
Y2 C61
Q12
R47
R45
C59
C60
U10
S1
RESET
R50 R49
J5
RESET
switch
OUT1
OUT0
OUT2
GND
J8
RELAY
D30
D34
Q17
Q16
Q13
U11
J6
C66
R48
RP13
PROGRAM
PORT
NC
COM
NO
K1
R56
D32
R55
C67
U12
D33Q14
J9
DISPLAY
C64
U13
C70
R51
R58
C65
Q20
R54
RP14
GND
To
PC COM port
RESET LP3500 when changing mode: Press RESET switch,
Cycle power off/on
after removing or attaching programming cable.
OR
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 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.
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 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
1
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
No
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
J4
J1
IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15
RN2
C15
C12
D5
D11
D7
C6
D4
D2
C8
D8
C10 C13
C2
RN1
R13
C3
R6
R16
R17
R7
R9
D1
R1
AIN0 AIN1 AIN2 AIN3
AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 GND GND
C16
C19
C20
(3.05)
U1
D15 D17
D13
Q22
R30
C24
R18
J3
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
U3
C43
C44
Y1
R32
C40
PWM1
PWM2
PWM0
D26
R37
D25
Q8
Q5
R42
R38
Q6
C53
C51
R34
R41
R39
C55
U8
R40 C54
R36
C50
D22
VBAT
GND VIN GND
EXT
OUT1
OUT0
OUT2
OUT5
OUT4
OUT3
OUT6
D28
Q10
R43
R33
Y2
C61
R44
R45
C59
C60
U9
S1
RESET
J2
GND
J8
RELAY
D30
D34
Q17
Q16
K1
Q13
D32
Q12
R47
R48
U10
R50 R49
J5
U11
RP13
PROGRAM
PORT
C67
U12
D33Q14
J6
C66
C64
U13
R51
C65
RP14
NC
COM
NO
R56
R55
J9
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
1M 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 k 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
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.
J1
J2
3.040
(77.2)
2.640
(67.1)
0.100
(2.54)
J6
J5
J4
PROGRAM
PORT
0.590
(15.0)
0.390
(9.9)
J8
J9
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
S1
J5
D30
R48
R50 R49
Q16
Q13
U11
C66
RP13
PROGRAM
PORT
GND
J8
RELAY
D34
Q17
K1
D32
C67
U12
D33Q14
J6
C64
U13
C70
R51
C65
Q20
RP14
NC
COM
NO
R56
R55
J9
DISPLAY
R58
R54
GND
J1
IN00 IN01 IN02 IN03 IN04 IN05 IN06 IN07 GND IN08 IN09 IN10 IN11 IN12 IN13 IN14 IN15
D2
D1
J4
Q22
D13
C24
R18
J3
U1
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
D5
D11
D7
C6
D4
C8
D8
C10 C13
C2
RN1
R13
C3
R6
R16
R17
R7
R9
R1
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
Q6
C53
R39
R40 C54
D28
D26
Q8
R43
R33
R41
R44
C55
R45
C59
C60
U9
RESET
J2
D20
R37
D25
Q5
D21
C48
U3
C43
C44
R32
PWM1
PWM0
R42
C51
R34
U8
R36
C50
Y1
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
J3
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
U6
U2
JP13
JP9
420 mA
AIN3
AIN2
AIN1
AIN0
AIN6
AIN5
AIN4
AIN3
AIN2
AIN1
AIN0
PROGRAM
PORT
U7
VBAT
VIN
EXT
GND
GND
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
J3
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 surface-mounted resistors. 390 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
R
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
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
S4
J23
IN15 IN14 IN13 IN12 IN11 IN10 IN09 IN08 IN07 IN06 IN05 IN04 IN03 IN02 IN01 IN00
J11
GND
VIN
J12
J1
J13
J41
J3
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
J2
J4
J42
J21
VIN
VIN
GND
GND
VIN
GND
R1
J43
4.14
(105)
S1
S2
S3
RN1
GND
VIN
(87)
3.41
GND
VIN
DS4 DS3 DS2 DS1
D1
J44
PWR
J5
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
J1
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
J2
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
S4
Pushbutton
S3
Analog
Inputs
PWM
Outputs
Power
Supply
Switches
S2
S1
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
K
+K
OUT9
OUT8
OUT7
OUT6
OUT5
OUT4
OUT3
OUT2
OUT1
OUT0
3 V VBAT
J3
J5
J12
J41 J42
J43
R1
J44
D1
PWR
Raw DC
Power
Input
IN00
IN01
IN02
IN03
J4
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
J1
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
J2
J3
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
×
J5
Contrast
Adjustment
J5
3
4
1
2
J5
3
4
OTHER
3.3 V n.c. = 5 V
KP1
3.3 V
5 V
R2
C2
U3
LCD1
Q1
R25
R8
R26
R11
J5
LP3500
2.8 V
R13
1
Q4
2
R17
C17
C1
D2
C6
C3
R1
C9
C7
U4
R14
R20
Q6
Q7
R23
R22
U6
U7
RN1
J4
34
n.c.
D1
JP1
C5
U2
R4 R5
C11
R10
R9
R19
Q3
Q2
U5
C14
R24
C15
C16
C4
R3
U1
C10
CR1
R6
C13
C12
R7
J1
R12
R15
R18
R16
Q5
R21
Q8
J2
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
J1
/RES
VCC
LED4
LED7
GND
/CS
LED2
LED5
LED6
LED4
+5BKLT
LED3
LED1
LED2
/RES
/CS
VCC
+5BKLT
J3
GND
GND
DB7B
DB6B
DB4B
DB7B
DB5B
DB5B
DB3B
DB2B
DB3B
DB1B
DB0B
A1B
A0B
DB1B
A0B
A2B
A3B
A2B
GND
J2
GND
LED6
GND
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)
Loading...