How to configure the driver code of ADP55 to I/O expansion mode and keyboard mode
ADP5588
Production
The ADP5588 is an I/O port expander and keypad matrix
designed for QWERTY type phones that require a large keypad
matrix and expanded I/O lines. I/O expander...
Datasheet
ADP5588 on Analog.com
How to configure the driver code of ADP55 to I/O expansion mode and keyboard mode