Freescale Semiconductor MC68HC908MR32 - Manual (Page 134)

Pulse-Width Modulator for Motor Control (PWMMC)
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
134 Freescale Semiconductor
Figure 12-21. PWM Polarity
UP/DOWN COUNTER
MODULUS = 4
PWM <= 0
PWM = 1
PWM = 2
PWM = 3
PWM >= 4
UP-ONLY COUNTER
MODULUS = 4
PWM <= 0
PWM = 1
PWM = 2
PWM = 3
PWM >= 4
CENTER-ALIGNED POSITIVE POLARITY EDGE-ALIGNED POSITIVE POLARITY
UP/DOWN COUNTER
MODULUS = 4
PWM <= 0
PWM = 1
PWM = 2
PWM = 3
PWM >= 4
UP-ONLY COUNTER
MODULUS = 4
PWM <= 0
PWM = 1
PWM = 2
PWM = 3
PWM >= 4
CENTER-ALIGNED NEGATIVE POLARITY EDGE-ALIGNED NEGATIVE POLARITY