Page 29 - DEC40053 Ebook_Timer

Example

Find the value T0CON if we want to program Timer0

in 16-bit mode, no prescaler. Use PIC18 Fosc/4 crystal;

oscillator for the clock source, increment on positive-

edge.

TMR0ON = 0 (default value)

T08BIT = 0 (16-bit mode)

T0CS = 0 (Internal clock Fosc/4 XTAL oscillator)

T0SE = 0 (Positive increment => rising increment)

PSA = 1 (no prescaler)

T0PS2:T0PS0 = 000 (don't care value)

T0CON = 0b00001000

What is T0CON value with same setting as above but

with 64 prescaler value?

All other bit are same except for bit 3:0 (prescaler)

PSA = 0 (Timer0 come from prescaler)

T0PS2:T0PS0 = 101 (Prescaler value 1:64)

T0CON = 0b00000101

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