mc68hc08qa24 Freescale Semiconductor, Inc, mc68hc08qa24 Datasheet - Page 335

• Manufacturer Part Number: mc68hc08qa24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC08QA24
Freescale Semiconductor
NOTE:
NOTE:
Before enabling a TIMB channel register for input capture operation,
make sure that the PTFx/TBCHx pin is stable for at least two bus clocks.
TOVx — Toggle-On-Overflow Bit
When TOVx is set, a TIMB counter overflow takes precedence over a
channel x output compare if both occur at the same time.
CHxMAX — Channel x Maximum Duty Cycle Bit
PTFx/TCHx
CHxMAX
When channel x is an output compare channel, this read/write bit
controls the behavior of the channel x output when the TIMB counter
overflows. When channel x is an input capture channel, TOVx has no
effect. Reset clears the TOVx bit.
When the TOVx bit is at logic 0, setting the CHxMAX bit forces the
duty cycle of buffered and unbuffered PWM signals to 100 percent.
As
it is set or cleared. The output stays at the 100 percent duty cycle level
until the cycle after CHxMAX is cleared.
1 = Channel x pin toggles on TIMB counter overflow.
0 = Channel x pin does not toggle on TIMB counter overflow.
Figure 21-8
OVERFLOW
Timer Interface B (TIMB)
COMPARE
PERIOD
OUTPUT
shows, the CHxMAX bit takes effect in the cycle after
Figure 21-8. CHxMAX Latency
OVERFLOW
COMPARE
OUTPUT
OVERFLOW
COMPARE
OUTPUT
OVERFLOW
Timer Interface B (TIMB)
COMPARE
OUTPUT
Technical Data
OVERFLOW
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