Timer2 as counter??

Petar · Joined: 30 Jan 2004 Posts: 7

Hello,

I have to implement a second counter on my PIC 18F452.
Is it possible to use timer2 as a counter?

Which PIN I have to use?

Thanks a lot!!!

Greatings
Petar

Mark · Joined: 07 Sep 2003 Posts: 2838 Location: Atlanta, GA

Read the datasheet.

Petar · Joined: 30 Jan 2004 Posts: 7

Thanks, but I have read it and I can't find anything - sorry !!

rnielsen · Joined: 23 Sep 2003 Posts: 852 Location: Utah

IF the datasheet was considered and looked at, one would find out that Timer2 is only a timer and that no input exists that could be used to increment it.

Petar · Joined: 30 Jan 2004 Posts: 7

OK, but here is the text from the datasheet

� Timer2 module: 8-bit timer/counter with 8-bit
period register (time-base for PWM)

rnielsen · Joined: 23 Sep 2003 Posts: 852 Location: Utah

Sometimes the data sheet has a typographical error here and there. Take a look at section 12 which describes Timer2 in depth. Look at the block diagram also. You will notice that there is nothing that states how to configure Timer2 to be a counter. Also, compare the block diagrams for the other timers. You will notice that there are inputs that allow for counting of external pulses. Always study the entire datasheet, pertaining to what you're after, in order to get a complete picture.

Ronald