mc68hc908mr32 Freescale Semiconductor, Inc, mc68hc908mr32 Datasheet - Page 136

• Manufacturer Part Number: mc68hc908mr32
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Pulse-Width Modulator for Motor Control (PWMMC)
136
UP/DOWN COUNTER
UP/DOWN COUNTER
PWM VALUE = 3
PWM VALUE = 3
DEAD-TIME = 2
DEAD-TIME = 2
MODULUS = 4
MODULUS = 4
PWM1/PWM2
PWM1/PWM2
DEAD-TIME
DEAD-TIME
OUTCTL
OUTCTL
PWM1
PWM2
PWM1
PWM2
OUT1
OUT2
OUT1
OUT2
DEAD-TIME INSERTED AS PART OF
NORMAL PWM OPERATION AS
CONTROLLED BY CURRENT
SENSING AND PWM GENERATOR
Figure 12-23. Dead-Time Insertion During OUTCTL = 1
Figure 12-24. Dead-Time Insertion During OUTCTL = 1
2
2
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
DEAD-TIME INSERTED BECAUSE
WHEN OUTCTL WAS SET, THE
STATE OF OUT1 WAS SUCH THAT
PWM1 WAS DIRECTED TO TOGGLE
2
DEAD-TIME INSERTED DUE
TO SETTING OF OUT1 BIT
2
DEAD-TIME INSERTED
BECAUSE OUT1 TOGGLES,
DIRECTING PWM1 TO
TOGGLE
2
2
NO DEAD-TIME INSERTED
BECAUSE OUT1 IS NOT
TOGGLING
DEAD-TIME INSERTED
DUE TO CLEARING OF
OUT1 BIT
2
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