Extend GPIO

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1

Hello all !

What is the best way to play with 96 gpio on the beagle board black ? I have not found cape to extend gpio …

I need to receive 80 contact closure.

TIA

cre4tix

2

Can you build a custom cape?
Using 10 74HC165 chips (parallel in / serial out cascadable) and the Beaglebone SPI would do it.

3

Or, building on Peter’s idea, consider using six each TI PCA9555.
16 inputs or outputs per IC, I2C interface, all can share the same I2C bus
they are per-pin configurable. including generating an interrupt on state change
of any or all I/O pins.

Or search on TI web site for bus extender

PCA9555
Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers

I/O data rates would be limited to what you can push through an I2C bus.

— Graham