mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 337

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
IPOLC
IPOLB
IPOLA
Field
2
1
0
Current Polarity — This buffered bit selects the PMF Value register for the PWM4 and PWM5 pins in top/bottom
software correction in complementary mode.
0 PMF Value 4 register in next PWM cycle.
1 PMF Value 5 register in next PWM cycle.
Note: The IPOLx bits take effect at the beginning of the next load cycle, regardless of the state of the load okay
Current Polarity — This buffered bit selects the PMF Value register for the PWM2 and PWM3 pins in top/bottom
software correction in complementary mode.
0 PMF Value 2 register in next PWM cycle.
1 PMF Value 3 register in next PWM cycle.
Note: The IPOLx bits take effect at the beginning of the next load cycle, regardless of the state of the load okay
Current Polarity — This buffered bit selects the PMF Value register for the PWM0 and PWM1 pins in top/bottom
software correction in complementary mode.
0 PMF Value 0 register in next PWM cycle.
1 PMF Value 1 register in next PWM cycle.
Note: The IPOLx bits take effect at the beginning of the next load cycle, regardless of the state of the load okay
1
2
3
The current status pins can be used as general purpose input/output ports.
The polarity of the ISx pin is latched when both the top and bottom PWMs are off. At the 0%
and 100% duty cycle boundaries, there is no deadtime, so no new current value is sensed.
Current is sensed even with 0% or 100% duty cycle.
ISENS
bit, LDOK. Select top/bottom software correction by writing 01 to the current select bits, ISENS[1:0], in the
PWM control register. Reading the IPOLx bits read the buffered value and not necessarily the value
currently in effect.
bit, LDOK. Select top/bottom software correction by writing 01 to the current select bits, ISENS[1:0], in the
PWM control register. Reading the IPOLx bits read the buffered value and not necessarily the value
currently in effect.
bit, LDOK. Select top/bottom software correction by writing 01 to the current select bits, ISENS[1:0], in the
PWM control register. Reading the IPOLx bits read the buffered value and not necessarily the value
currently in effect.
00
01
10
11
Table 11-17. PMFCCTL Field Descriptions (continued)
No correction
Manual correction
Current status sample correction on pins IS0, IS1, and IS2 during deadtime
Current status sample on pins IS0, IS1, and IS2
At the half cycle in center-aligned operation
At the end of the cycle in edge-aligned operation
Table 11-18. Correction Method Selection
MC9S12E256 Data Sheet, Rev. 1.08
1
Chapter 11 Pulse Width Modulator with Fault Protection (PMF15B6CV2)
Correction Method
Description
3
2
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