mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 357

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

11.4.4
Writing a logic one to a INDEPx bit configures a pair of the PWM outputs as two independent PWM
channels. Each PWM output has its own PWM value register operating independently of the other
channels in independent channel operation.
Writing a logic zero to a INDEPx bit configures the PWM output as a pair of complementary channels.
The PWM pins are paired as shown in
The complementary channel operation is for driving top and bottom transistors in a motor drive circuit,
such as the one in
Freescale Semiconductor
Independent or Complementary Channel Operation
INPUTS
AC
Figure
PAIR A
PAIR B
PAIR C
11-48.
Figure 11-48. Typical 3 Phase AC Motor Drive
Figure 11-47. Complementary Channel Pairs
PWM CHANNELS 0 AND 1
PWM CHANNELS 2 AND 3
PWM CHANNELS 4 AND 5
REGISTER
REGISTER
REGISTER
PMFVAL0
PMFVAL2
PMFVAL4
MC9S12E256 Data Sheet, Rev. 1.08
PWM
PWM
Figure 11-47
0
1
REGISTER
REGISTER
REGISTER
PMFVAL1
PMFVAL3
PMFVAL5
Chapter 11 Pulse Width Modulator with Fault Protection (PMF15B6CV2)
in complementary channel operation.
PWM
PWM
2
3
PWM
PWM
4
5
TOP
BOTTOM
TOP
BOTTOM
TOP
BOTTOM
MOTOR
TO
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