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PCAGPIO(4) Device Drivers Manual PCAGPIO(4)

pcagpioPhilips PCA955[4567] GPIO controller

pcagpio* at iic?
gpio* at pcagpio?

The pcagpio driver provides support for the Philips PCA955[4567] GPIO controllers. The PCA955[467] devices have 8 pins and the PCA9555 device has 16 pins which can be configured as either inputs or outputs, and accessed using gpioctl(8).

gpio(4), iic(4), intro(4), gpioctl(8)

The pcagpio driver first appeared in OpenBSD 3.9.

The pcagpio driver was written by Theo de Raadt <>.

July 16, 2013 OpenBSD-7.1