NXP Semiconductors MC9S08LG16, Reference Manual

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Chapter 15 Modulo Timer (S08MTIMV1)
MC9S08LG32 MCU Series, Rev. 5
336 Freescale Semiconductor
17.4.1 MTIM Operation Example
This section shows an example of the MTIM operation as the counter reaches a matching value from the
modulo register.
Figure 17-8. MTIM counter overflow example
In the example of Figure 17-8 , the selected clock source could be any of the four possible choices. The
prescaler is set to PS = %0010 or divide-by-4. The modulo value in the
MTIM
MOD register is set to $AA.
When the counter,
MTIM
CNT, 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