Atmel ATAVRAUTO100 User Manual

ATAVRAUTO100

..............................................................................................

User Guide

Section 1

Introduction ........................................................................................... 1-4

1.1 Overview ...................................................................................................1-4

Section 2

Using the ATAVRAUTO100.................................................................. 2-6

2.1 Overview ...................................................................................................2-6

2.2 Power Supply ............................................................................................2-7

2.3 Oscillator Sources .....................................................................................2-7

2.4 On-board ressources ................................................................................2-8

2.5 In-System Programming .........................................................................2-10

2.6 Debugging...............................................................................................2-12

Section 3

Technical Specifications ..................................................................... 3-15

Section 4

Technical Support............................................................................... 4-17

Section 5

Complete Schematics......................................................................... 5-19

ATAVRAUTO100 User Guide -3

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Section 1

Introduction

Congratulations on your selection of the ATAVRAUTO100. This board includes all ele­ments necessary for designers to quickly develop code related to CAN and LIN
communication gateway implementing the AT90CAN128 and for prototyping and testing
of new designs.

1.1 Overview

This document describes the ATAVRAUTO100, a board providing CAN and LIN net­working resources. The AT90CAN128 AVR micro controller supports both the CAN and
LIN protocols: the ATA6660 and ATA6621 are ideally suited for CAN and LIN physical
connections.

This user guide acts as a general getting started guide as well as a complete technical
reference for advanced users.

Figure 1-1. ATAVRAUTO100

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Introduction

1.2 ATAVRAUTO100 Features

The ATAVRAUTO100 provides the following features:

 AT90CAN128 QFN64,

 AVR Studio software interface

 Power supply:

– regulated 5.0V out of the VBAT (typical 12V) from the LIN connector

 JTAG connector:

– for on-chip In Situ Programming (ISP)

– for on-chip debugging using JTAG ICE

 Serial interfaces:

– 1 CAN interface (High Speed and Low Speed)

– 1 LIN interface 1.3 and 2.0 compliant (Software library available on the Atmel

website for LIN 1.3).

(Note:)

,

 On-board resources:

– 1 high speed CAN transceiver ATA6660

– 1 LIN transceiver ATA6621 implementing one 5.0V voltage regulator and a

watchdog

– 1 blue LED

 1 Jumper to add a 1KΩ pull-up resistor when Master mode is selected (LIN)

 On-board In Situ Programming jumper

 System clock:

– 8 MHz crystal

 Dimension: 45 mm x 45 mm

Note: The AT90CAN128 is supported by AVR Studio, version 4.12 or higher. For up-

to-date information on this and other AVR tool products, please consult our web
site. The newest version of AVR Studio, AVR tools and this user guide can be
found in the AVR section of the Atmel web site, http://www.atmel.com.

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2.1 Overview

AT90CAN128

CAN

LIN

8MHz CRYSTAL

JTAG

&

ISP

MAST

Section 2

Using the ATAVRAUTO100

Figure 2-1. ATAVRAUTO100 Overview

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Using the ATAVRAUTO100

2.2 Power Supply

Th e on - boa r d pow er su p pl y m us t b e pro vi de d via th e L I N c o nn ect o r. Th e
ATAVRAUTO100 has been designed for operating voltage from 7V to +18V with typical
voltage at 12V. The LIN transceiver ATA6621, connected to the LIN network, has an
internal voltage regulator which outputs 5.0V ±3%. This voltage is used to power the
AT90CAN128 device.

Figure 2-2. The LIN power line is used to bias the ATAVRAUTO100

Note: A LIN network has to be connected to have your LIN interface working (Input

supply from 7 to 18V DC).

2.3 Oscillator Sources

2.3.1 Internal RC oscillator

The ATAVRAUTO100 allows two oscillator sources:

 Internal RC oscillator

 External crystal (Default setting configuration)

The calibrated internal RC Oscillator provides a fixed 8.0 MHz clock. The frequency is
nominal value at 3V and 25°C. If 8 MHz frequency exceeds the specification of the
device (depends on VCC), the CKDIV8 fuse must be programmed in order to divide the
internal frequency by 8 during start-up. The device is shipped with the CKDIV8 fuse pro­grammed. See “System Clock Prescaler” on page 41 for more details. This clock may
be selected as the system clock by programming the CKSEL fuses as shown in Table

11. If selected, it will operate with no external components. During reset, hardware loads
the calibration byte into the OSCCAL Register and thereby automatically calibrates the
RC Oscillator. At 5V and 25°C, this calibration gives a frequency within ±10% of the
nominal frequency. Using calibration methods as described in application notes avail­able at www.atmel.com/avr it is possible to achieve ± 2% accuracy at any given VCC
and temperature. When this Oscillator is used as the chip clock, the Watchdog Oscillator
will still be used for the Watchdog Timer and for the Reset Time-out.

Note: The internal RC oscillator can not be used to operate the ATAVRAUTO100 for

CAN operations. Only LIN Slave mode with a run-time oscillator calibration can
be used with the internal RC oscillator.

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Using the ATAVRAUTO100

2.3.2 External crystal Necessary for the CAN network precision, the following crystal frequency allows proper

ATAVRAUTO100 operations

(1)

: 8MHz, 12MHz, 16MHz. The ATAVRAUTO100 comes

with a default 8MHz crystal oscillator (CAN baut rate up to 1MBit/sec).

The LIN master mode clock should always be a crystal or external clock oscillator. Cur­rently, only 8MHz and 16MHz crystal oscillator is supported.

Figure 2-3. Crystal Oscillator connection.

Note: Only the 8MHz and 16MHz frequency are supported by the CAN and LIN libraries

2.4 On-board ressources

2.4.1 LIN Connection to the LIN network is made via the LIN connector JP3. The LIN signal must

be connected to the pin 2 of the connector.

Figure 2-4. .LIN And Power-supply Connections to JP3

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Using the ATAVRAUTO100

2.4.2 LIN MASTER selection

To operate the LIN in Master mode, one 1kΩ resistor must be placed at the Master con­nection. To do so, the MSTR jumper must be positionned as indicated in Figure 2-4.

2.4.3 CAN Connection to the CAN network is made via the CAN connector JP2. Only the CAN- and

CAN+ are connected. The signals are routed to ATA6660 CAN high speed transceiver.

Figure 2-5. CAN High Speed connections

2.4.4 LED The blue LED is illuminated when the ATAVRAUTO100 is correctly powered, i.e. volt-

age higher than +5V is present on the LIN connector.

Figure 2-6. VDD presence is indicated via the blue LED illumination.

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2.5 In-System Programming

JTAGICE

ISP

The arrow has to be in front of the point

The AT90CAN128 can be programmed using specific SPI links. This sub section will
explain how to connect the programmer.

The FLASH, EEPROM memory (and all Fuse and Lock Bit Option ISP-programmable)
can be programmed individually or with the sequential automatic programming option.

Note: When programming, the NISP jumper has to be removed.

2.5.1 Using the ATAVRAUTO900 Adaptator

The AVR ISP programmer is a compact and easy-to-use In-System Programming tool
for developing applications with AT90CAN128. Due to the small size, it is also an excel­le n t t ool fo r fi e ld upg ra des of ex is tin g a pp lic a tio n s. It is po w ere d b y t he
ATAVRAUTO100 and an additional power supply is thus not required. The AVR ISP
programming interface is integrated in AVR Studio®. An additional adaptator has to be
used to program the board using ISP or JTAG mode. The 10 pins connector is used for
the JTAGICE mkII device and the 6 pins connector is used for the AVRISP device. To
plug the ATAVRAUTO900 connector to the board, the arrow (on the adaptor) has to be
in front of the point (on the board).

Using the ATAVRAUTO100

Figure 2-7. ATAVRAUTO900 Connection

Table 2-1. ICE Connector

PIN Function

1 TCK

2 GND

3 TDO

4 VCC

5 TMS

6 NRES

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Using the ATAVRAUTO100

Table 2-1. ICE Connector

PIN Function

7 VCC

8 NC

9 TDI

10 GND

Table 2-2. ISP Connector

PIN Function

1 MISO

2 VCC

3 SCK

4 MOSI

5 NRES

6 GND

2.5.2 Programming with AVR ISP via SPI

Both the Flash and EEPROM memory arrays can be programmed using the serial SPI
bus while RESET is pulled to GND. The serial interface consists of pins SCK, MOSI
(input) and MISO (output). After RESET is set low, the Programming Enable instruction
needs to be executed first before program/erase operations can be executed. Note that
throughout the description about Serial downloading, MOSI and MISO are used to
describe the serial data in and serial data out respectively. For AT90CAN128 these pins
are mapped to PDI (PE0) and PDO (PE1).

To program the device using AVR ISP programmer, connect the AVR ISP to the adaptor
(ATAVRAUTO900) and connect the adaptor to the connector of the ATAVRAUTO100.

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Figure 2-8. Programming the ATAVRAUTO100 using ATAVRAUTO900

AVR ISP

JTAGICE mkII

2.5.3 Programming with AVR JTAGICE mkII

The AT90CAN128can be preogrammed using specific JTAG link: 3-wire debug-wire
interface. To use the AVR JTAGICE mkII with an ATAVRAUTO100 an optional adaptor
should be used. Then the JTAG probe can be connected to the ATAVRAUTO100 as
shown in the following figure.

Using the ATAVRAUTO100

Figure 2-9. JTAGICEmkII probe connecting through debugWIRE interface.

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Using the ATAVRAUTO100

2.6 Debugging

2.6.1 Debugging with AVR JTAGICEmkII

The JTAGEN fuse must be programmed to enable the JTAG Test Access Port. In addi-

tion, the OCDEN fuse must be programmed and no Lock bits must be set for the Onchip

debug system to work. As a security feature, the On-chip debug system is disabled

when either of the LB1 or LB2 Lock bits are set. Otherwise, the On-chip debug system

would have provided a back-door into a secured device.

The AVR Studio enables the user to fully control execution of programs on an AVR

device with On-chip Debug capability, AVR In-Circuit Emulator, or the built-in AVR

Instruction Set Simulator. AVR Studio® supports source level execution of Assembly pro-

grams assembled with Atmel Corporation’s AVR Assembler and C programs compiled

with third party vendors’ compilers.

AVR Studio runs under Microsoft

the AVR Studio, please refer to the AVR Studio User Guide.

®

Windows 95/98/2000/NT/XP. For a full description of

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Section 3

Technical Specifications

 System Unit

– Physical Dimensions...............................................L=45 x W=45 x H=8 mm

– Weight ........................................................................................................17 g

 Operating Conditions

– Internal Voltage Supply ..... ...................................................................... 5.0V

– External Voltage Supply .....................................................................7V -18V

ATAVRAUTO100 User Guide 3-15

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Section 4

Technical Support

For Technical support, please contact [e-mail]. When requesting technical sup­port, please include the following information:

 Which target AVR device is used (complete part number)

 Target voltage and speed

 Clock source and fuse setting of the AVR

 Programming method (ISP, JTAG or specific Boot-Loader)

 Hardware revisions of the AVR tools, found on the PCB

 Version number of AVR Studio. This can be found in the AVR Studio help menu.

 PC operating system and version/build

 PC processor type and speed

 A detailed description of the problem

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Section 5

Complete Schematics

On the next pages, the following documents of ATAVRAUTO100 are shown:

 Complete schematics,

 Bill of materials

 Assembly drawing

ATAVRAUTO100 User Guide 5-19

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Figure 5-1. ATAVRAUTO100 Schematic

Complete Schematics

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Complete Schematics

Figure 5-2. ATAVRAUTO100 Bill of materials

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Figure 5-3. ATAVRAUTO100 assembly drawing

LIN

CAN to LIN Gateway

C3

R6

NISP

R8

BOOT

C4 C5

C10

R3

C8

Y1

C2

R12

U3

C7

R9

C1

TERM2

C6

R5

U1

R4

TERM1

CAN

R7

R11 C11

D2

D_WD

Q1

D3

NWAKE

R10

MAST

ATAVRAUTO100

ICE&ISP

PM-06

V1.0

NRES

C9

U2

R13

DB DG D1

R2 R1

Complete Schematics

ATAVRAUTO100 User Guide 5-22

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