MC68HC708MP16 Datasheet, PDF (188/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

Pulse Width Modulator for Motor Control (PWMMC)
9.12 PWM Glossary
CPU Cycle — One internal bus cycle (1/f_op)
PWM Clock Cycle (or Period) — One tick of the PWM counter (1/f_op
with no prescaler). See Figure 9-51.
PWM Cycle (or Period)
• Center-aligned mode: The time it takes the PWM counter to count
up and count down (modulus*2/f_op assuming no prescaler). See
Figure 9-51.
• Edge-aligned mode: The time it takes the PWM counter to count
up (Modulus/f_op). See Figure 9-51.
CENTER-ALIGNED MODE
PWM CLOCK CYCLE
PWM CYCLE (OR PERIOD)
EDGE-ALIGNED MODE
PWM
CLOCK
CYCLE
PWM CYCLE (OR PERIOD)
Figure 9-51. PWM Clock Cycle and PWM Cycle Definitions
Technical Data
188
MC68HC708MP16 — Rev. 3.1
Pulse Width Modulator for Motor Control (PWMMC) Freescale Semiconductor