Key-Matrix with Serial GPIOs (SGPIOs) ?

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by Martin84 on Tue Mar 18 10:30:07 MST 2014
I want to read a Key-Matrix with the LPC4357. Therefore I wanna activate the rows sequentially and read the status of the columns. If a key is pressed the column line activates a group interrupt. In the Interrupt-Routine I can read which key is pressed.

So I first thought about using only GPIOs for column and rows. But then I read something about SGPIOs.

Is it advantageous to use SGPIOs for driving and reading a Key-Matrix? Is there an example for a Key-Matrix with SGPIOs?