XC912BC32CFU8 Motorola Semiconductor Products, XC912BC32CFU8 Datasheet - Page 137

• Manufacturer Part Number: XC912BC32CFU8
• Description: M68HC12B Family Data Sheet
• Manufacturer: Motorola Semiconductor Products

M68HC12B Family — Rev. 8.0
MOTOROLA
PCLK3 — PWM Channel 3 Clock Select Bit
PCLK2 — PWM Channel 2 Clock Select Bit
PCLK1 — PWM Channel 1 Clock Select Bit
PCLK0 — PWM Channel 0 Clock Select Bit
PPOL3 — PWM Channel 3 Polarity Bit
PPOL2 — PWM Channel 2 Polarity Bit
PPOL1 — PWM Channel 1 Polarity Bit
PPOL0 — PWM Channel 0 Polarity Bit
Depending on the polarity bit, the duty registers may contain the count of either the
high time or the low time. If the polarity bit is 0 and left alignment is selected, the
duty registers contain a count of the low time. If the polarity bit is 1, the duty
registers contain a count of the high time.
If a clock select is changed while a PWM signal is being generated, a truncated
or stretched pulse may occur during the transition.
0 = Clock B is the clock source for channel 3.
1 = Clock S1 is the clock source for channel 3.
0 = Clock B is the clock source for channel 2.
1 = Clock S1 is the clock source for channel 2.
0 = Clock A is the clock source for channel 1.
1 = Clock S0 is the clock source for channel 1.
0 = Clock A is the clock source for channel 0.
1 = Clock S0 is the clock source for channel 0.
0 = Channel 3 output is low at the beginning of the period, high when the duty
1 = Channel 3 output is high at the beginning of the period, low when the duty
0 = Channel 2 output is low at the beginning of the period, high when the duty
1 = Channel 2 output is high at the beginning of the period, low when the duty
0 = Channel 1 output is low at the beginning of the period, high when the duty
1 = Channel 1 output is high at the beginning of the period, low when the duty
0 = Channel 0 output is low at the beginning of the period, high when the duty
1 = Channel 0 output is high at the beginning of the period, low when the duty
count is reached.
count is reached.
count is reached.
count is reached.
count is reached.
count is reached.
count is reached.
count is reached.
Pulse-Width Modulator (PWM)
Pulse-Width Modulator (PWM)
PWM Register Descriptions
Data Sheet
137