Datasheet

Chapter 12 Modulo Timer (S08MTIMV1)
MC9S08SG32 Data Sheet, Rev. 8
194 Freescale Semiconductor
12.4.1 MTIM Operation Example
This section shows an example of the MTIM operation as the counter reaches a matching value from the
modulo register.
Figure 12-8. MTIM counter overflow example
In the example of Figure 12-8, the selected clock source could be any of the five possible choices. The
prescaler is set to PS = %0010 or divide-by-4. The modulo value in the MTIMMOD register is set to $AA.
When the counter, MTIMCNT, reaches the modulo value of $AA, the counter overflows to $00 and
continues counting. The timer overflow flag, TOF, sets when the counter value changes from $AA to $00.
An MTIM overflow interrupt is generated when TOF is set, if TOIE = 1.
selected
clock source
MTIMCNT
MTIM clock
(PS=%0010)
MTIMMOD:
$AA
$A7 $A8 $A9 $AA $00 $01
TOF