XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 340

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

Timer Interface Module B (TIMB)
20.9.5 TIMB Channel Registers
Technical Data
340
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.
In input capture mode (MSxB–MSxA = 0:0) reading the high byte of the
TIMB channel x registers (TBCHxH) inhibits input captures until the low
byte (TBCHxL) is read.
In output compare mode (MSxB–MSxA ≠ 0:0) writing to the high byte of
the TIMB channel x registers (TBCHxH) inhibits output compares and
the CHxF bit until the low byte (TBCHxL) is written.
PTEx/TCHx
CHxMAX
When the TOVx bit is at logic 1, setting the CHxMAX bit forces the
duty cycle of buffered and unbuffered PWM signals to 100%. As
Figure 20-8
is set or cleared. The output stays at the 100% duty cycle level until
the cycle after CHxMAX is cleared.
OVERFLOW
Timer Interface Module B (TIMB)
COMPARE
shows, the CHxMAX bit takes effect in the cycle after it
PERIOD
OUTPUT
Figure 20-8. CHxMAX Latency
OVERFLOW
COMPARE
OUTPUT
OVERFLOW
COMPARE
OUTPUT
MC68HC908AZ60A — Rev 2.0
OVERFLOW
COMPARE
OUTPUT
MOTOROLA
OVERFLOW