I2C-9555
I2C PCF8474-based IO Expander with 4x IO4 connections
A compliment to the [I2C-8574-IO] dual 8-bit board, the 9555 offers a 16 bit data path (2x 8-bit ports, port0 and port1) This board is slightly cheaper to build (1x 9555 chip -vs- 2x 8574 chips…), but slightly harder to use (unpacking 16 bit words into byte size chunks) This board was not updated to use IOB daughtercards…
I2C-9555 Version 3.0
First built: 2014-04, 2014-07, 2014-08
A compliment to the [I2C-8574-IO] dual 8-bit board, the 9555 offers a 16 bit data path (2x 8-bit ports, port0 and port1) This board is slightly cheaper to build (1x 9555 chip -vs- 2x 8574 chips…), but slightly harder to use (unpacking 16 bit words into byte size chunks) This board was not updated to use IOB daughtercards…
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UNPUBLISHED
I2C-9555 Version 2.2
First built: 2014-04, 2014-07, 2014-08
A compliment to the [I2C-8574-IO] dual 8-bit board, the 9555 offers a 16 bit data path (2x 8-bit ports, port0 and port1) This board is slightly cheaper to build (1x 9555 chip -vs- 2x 8574 chips…), but slightly harder to use (unpacking 16 bit words into byte size chunks) This board was not updated to use IOB daughtercards…
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UNPUBLISHED
This technical documentation is licensed under the CERN Open Hardware Licence v1.2