search

oxidecomputer / gemini-bringup

EDA work for the Gemini bringup vehicle
Mozilla Public License 2.0
1 stars 0 forks source link

[SP] add I2C GPIOs on header. #26

Closed cbiffle closed 4 years ago

cbiffle commented 4 years ago

The SP in the PSC needs ~16 GPIOs to sense things like power status. GPIOs are handy anyway. I suggest that we...

  1. Try and route ~16 native GPIOs to a header.
  2. Also lay down a common I2C GPIO expander and route that to a header, so we can write a driver for one if needed.
cbiffle commented 4 years ago

This is partially a dup of #2 so I'm narrowing it to just the I2C GPIO expander.