mc68hc708mp16 Freescale Semiconductor, Inc, mc68hc708mp16 Datasheet - Page 153

• Manufacturer Part Number: mc68hc708mp16
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC708MP16
Freescale Semiconductor
—
HIGH NEGATIVE CURRENT
Rev. 3.1
LOW NEGATIVE CURRENT
HIGH POSITIVE CURRENT
LOW POSITIVE CURRENT
LOAD VOLTAGE WITH
LOAD VOLTAGE WITH
LOAD VOLTAGE WITH
LOAD VOLTAGE WITH
PWM TO BOTTOM
deadtime interval, the load voltage near a current zero crossing is
somewhere between the high and low levels.
Each ISx pin is sampled twice in a PWM period. The values are stored
in the DTx bits in the fault acknowlege register. The DTx bits are a timing
marker to indicate when to toggle between PWMVAL register. In the low-
current condition immediately before a current zero crossing, the two
DTx bits in a pair have dissimilar values. Software can then set the
IPOLx bit to toggle PWMVAL registers before the zero crossing ocurs.
Pulse Width Modulator for Motor Control (PWMMC)
PWM TO TOP
TRANSISTOR
TRANSISTOR
DEADTIME
T = DEADTIME INTERVAL BEFORE ASSERTION OF TOP PWM
B = DEADTIME INTERVAL BEFORE ASSERTION OF BOTTOM PWM
Figure 9-21. Output Voltage Waveforms
T
B
Pulse Width Modulator for Motor Control (PWMMC)
T
B
Technical Data
CURRENT
POSITIVE
NEGATIVE
CURRENT
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