mc68hc908mr8 Freescale Semiconductor, Inc, mc68hc908mr8 Datasheet - Page 245

• Manufacturer Part Number: mc68hc908mr8
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

12.10.5 TIMB Channel Registers
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
NOTE:
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
These read/write registers contain the captured TIMB counter value of
the input capture function or the output compare value of the output
compare function. The state of the TIMB channel registers after reset is
unknown.
PTBx/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 1, setting the CHxMAX bit forces the
duty cycle of buffered and unbuffered PWM signals to 100 percent. As
Figure 12-8
is set or cleared. The output stays at the 100 percent duty cycle level
until the cycle after CHxMAX is cleared.
TOVx
1 = Channel x pin toggles on TIMB counter overflow.
0 = Channel x pin does not toggle on TIMB counter overflow.
OVERFLOW
Timer Interface B (TIMB)
COMPARE
shows, the CHxMAX bit takes effect in the cycle after it
PERIOD
OUTPUT
Figure 12-8. CHxMAX Latency
OVERFLOW
COMPARE
OUTPUT
OVERFLOW
COMPARE
OUTPUT
OVERFLOW
Timer Interface B (TIMB)
COMPARE
OUTPUT
Technical Data
I/O Registers
OVERFLOW
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