Atmel AVR2070 Appendix E - Third-Party Reference Designs / Platforms

84 AVR2070 8240B-AVR-06/09

Appendix E - Third-Party Reference Designs / Platforms

This section describes various reference designs that can be purchased from

distributors like Dresden Elektronik (www.dresden-elektronik.de) and TRT

Technology (www.trttech.com). These platforms are supported within the RUM

source code for alternate evaluation and development options.

The REB (Radio Extender Board) is designed to support evaluation of the standalone

transceiver and this board can be connected to an STK500/600 or the AT91SAM7X-

EK kit. Using the generic connection guide in section 4.2 will provide a method for

connecting the board to any evaluation kit of choice. The REB can also be connected

to the AT91SAM7X-EK board with a REX_ARM adapter board.

The Atmel IEEE 802.15.4 radios can be controlled via SPI and a few discreet IO

signal lines. Please refer to the respective datasheets for detailed information on the

radio – microcontroller physical connections. To separate the radio from the external

memories present or possible on the SAM7X board SPI-1 is used. The SAM7X is

connected to the AT86RF2xx family based on the following table. This table also

includes the REX_ARM adaptor board connections between the AT91SAM7X-EK and

the REB.

Table E-1 Signal Connections

ARM Adapter Board AT91SAM7X-EK Board

REB Pin SAM7X-EK

Header Pin SAM7X

MCU Pin Port Port Function

MISO 27 A25 56 PA24

SPI1_MISO

MOSI 28 A24 55 PA23

SPI1_MOSI

SCK 29 A23 50 PA22

SPI1_SPCK

SEL 30 A22 49 PA21

SPI1_NPCS0

IRQ 38 C24 80 PA30

IRQ0

CLK1 17 C22 70 PB24

TIOB0

SLEEP_TR 26 A9 13 PA8 PA8

RST 25 A10 14 PA9

PA9

TXCW 24 A27 60 PA26

PA26

Note: Only needed

for AT86RF230

An example of using the AT91SAM7X-EK and the REB with the REX_ARM adaptor is

shown in the following pictures.