16F1937 8bit timer 2/4 & 6
Posted: Fri Aug 23, 2019 8:31 am
As timer 2/4 & 6 are 8 bits, they should not default to(or allow) 256 rollover value:
When OK is clicked on the values are excepted.
Hi Martin,
The rollover of 256 as the default is correct.
The interrupt occurs when the count register goes from 255 to 0 e.g. the 256th count.
0 to 1 = count 1
1 to 2 = count 2
...
254 to 255 = count 255
255 to 0 = count 256
We use the rollover value - 1 behind the scenes in the rollover register so 256 would become 255 for say the PR2 register.