asfmag2003
Newbie level 2
Hi
I have to write a micro-controller program to scan 30 input pins. I only need to know whether they are high/low and the speed can be very slow. But the problem is that 16C54 does not have so much input pins.
I have searched from the Internet that there are matrix for keyboard input. However, is it possible to use matrix or other design so that I can reduce the input pin count ?
Thank you in adavnce.
I have to write a micro-controller program to scan 30 input pins. I only need to know whether they are high/low and the speed can be very slow. But the problem is that 16C54 does not have so much input pins.
I have searched from the Internet that there are matrix for keyboard input. However, is it possible to use matrix or other design so that I can reduce the input pin count ?
Thank you in adavnce.