18F4620 TMR1 Oshonsoft

Hi,
Here is a TMR1 test program for 18F4620, which needs INTERRUPT time setting [ TMR1L = TMR1H ]

Here is a calculation, to assist the settings: (Thanks E)
(The OSC is from an 8MHz XTL with PLL enabled.)

[[ Prescaler for TMR1 look at T1CON = 0x30' = 8:1, so thats 1MHz/8= 125KHz or 8uSec

Then TMR1 if loaded with 0xFFFF =65536 division =1.97Hz or ~0.52Sec period.

So load TMR1 with 0x0BDC [ decimal 65536-62500=3036] , that will give 8uSec*62500...

18F4620 TMR1 Oshonsoft