The pin will have 1/4 of the PIC clock speed on it...
say the PIC is running at 4MHz, then the pin will have a 1MHz square wave as seen with an oscilloscope. It could be used as a 'clock source' for external peripherals or say another PIC.
Most PIC I/O pins have several uses, so you'll have to choose IF you want that function.
Joined: 04 Jun 2017 Posts: 102
Posted: Mon Jul 05, 2021 8:16 pm
You beat me to it about pin being multiplexed.
Datasheet pin description also says this.
For that pin 4
Clock input to TMR0
Seems like that would take some work on control register.
Timer0 module. To make it clock in. _________________ CCS 16F1459 PCWH Compiler
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Joined: 11 Mar 2010 Posts: 17322
Posted: Tue Jul 06, 2021 7:21 am
You almost never have to touch a register in CCS.
To set that pin to be a clock input, you use the setup_timer_0 function,
with the setting T0_EXT_L_TO_H (or H_TO_L).
This sets it to clock on the high or low edge of the clock applied to this
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