mc68hc908mr24 Freescale Semiconductor, Inc, mc68hc908mr24 Datasheet - Page 162

• Manufacturer Part Number: mc68hc908mr24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Pulse-Width Modulator for Motor Control
Advance Information
162
UP/DOWN COUNTER
UP/DOWN COUNTER
PWM VALUE = 3
PWM VALUE = 3
DEAD TIME = 2
DEAD TIME = 2
MODULUS = 4
PWM1/PWM2
MODULUS =4
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 9-22. Dead-Time Insertion During OUTCTL = 1
Figure 9-23. Dead-Time Insertion During OUTCTL = 1
2
2
Pulse-Width Modulator for Motor Control (PWMMC)
x x x x
x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x
x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x
DEAD TIME INSERTED BECAUSE
WHEN OUTCTL WAS SET, THE
STATE OF OUT1 WAS SUCH THAT
PWM1 WAS DIRECTED TO TOGGLE
2
x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x
x
x x x
DEAD TIME INSERTED DUE
TO SETTING OF OUT1 BIT
2
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x
x x
x x x x x x
DEAD TIME INSERTED
BECAUSE OUT1 TOGGLES,
DIRECTING PWM1 TO
TOGGLE
x
x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x x
x
x x
x
x x
x
x x
x x
x
x x
x
2
2
MC68HC908MR24
NO DEAD TIME INSERTED
BECAUSE OUT1 IS NOT
TOGGLING
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x x x
x x x x
x x
x x x x
x x
x x
x x
x x x x x x
DEAD TIME INSERTED
DUE TO CLEARING OF
OUT1 BIT
Freescale Semiconductor
2
—
Rev. 4.1