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BF609 Ez-board expansion adaptor board


BF609 EZ-board is a compact board with tiny connectors on it for expansion interface. Adaptor board described in this document is a bridge between the tiny expansion interface on 609 EZ-board and the add on extend boards like audio, camera, SPI flash etc designed for formerly BF5xx board. This enables these add on cards immediately available on the new 609 EZ-board.

This board is an open source project. The schematics and the Gerber file are open to download, revise and manufacture, but ADI does not sell this board directly.

Interface covered

1)SPORT: BF609 use two single direction sports, one for TX another for RX, this is different from the BF5xx series, details in HRM of 609.

2)PPI To enhance the signal quality a bi-direction bus buffer is introduced in, need to switch SW1 to different position for input and output.

3) TWI TWI port. GPIO timer output PINs are also available on this interface.

4)IRDA IRDA and RS232 shares the same signal source, can be separated on and off by SW8. Signal source is from UART or UART over SPORT selected by SW5 and SW10

5)SPI over SPORT SPORT signal to simulate the SPI

6)SPI 7)RS-232 UART

Switch description

SW1: For camera: 1 ON 2 OFF

For display: 1 OFF 2 ON

SW5 and SW10:

SW5 3 4 ON and SW10 2 3 OFF to choose UART for RS-232 and IRDA

SW5 3 4 OFF and SW10 2 3 ON to choose SPORT for RS-232 and IRDA

SW8: Selection switch between RS232 and IRDA

AD1836 test: J3 SPORT pin 1 connect to pin 2, pin 5 RESET connect to EI3 pin 57 RESET_OUT. SW5 1 ON.

More details on schematics


1, Only apply to connector P1A on 609 board

2, use bolt to fasten the 609 and add on daughter card


when connecting to BF609 Ez-board

Schematics and Gerber

Review the schematics and Gerber files for manufacturing here: