Freescale Semiconductor MC68HC908MR32 Manual Do Utilizador
PWM Glossary
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
Freescale Semiconductor
155
12.10 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
.
PWM cycle (or period)
•
Center-aligned mode: The time it takes the PWM counter to count up and count down (modulus *
2/f
2/f
OP
assuming no prescaler). See
.
•
Edge-aligned mode: The time it takes the PWM counter to count up (modulus/f
OP
). See
.
Figure 12-47. PWM Clock Cycle and PWM Cycle Definitions
PWM CLOCK CYCLE
PWM CYCLE (OR PERIOD)
PWM
PWM CYCLE (OR PERIOD)
Center-Aligned Mode
Edge-Aligned Mode
CLOCK
CYCLE
CYCLE