PXD10RM Datasheet, PDF (1147/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Table 35-19. Corresponding Registers and Pin Names for each PWM Channel Pair (continued)
PWM Channel
Pair Number
PWM
Channel
Control
Register
Duty Cycle Register
Channel Number
Pin
Names
MCCC2
1
MCCC3
MCDC2
MCDC3
PWM Channel 2
PWM Channel 3
M1C0M
M1C0P
M1C1M
M1C1P
MCCC4
2
MCCC5
MCDC4
MCDC5
PWM Channel 4
PWM Channel 5
M2C0M
M2C0P
M2C1M
M2C1P
MCCC6
3
MCCC7
MCDC6
MCDC7
PWM Channel 6
PWM Channel 7
M3C0M
M3C0P
M3C1M
M3C1P
MCCC8
4
MCCC9
MCDC8
MCDC9
PWM Channel 8
PWM Channel 9
M4C0M
M4C0P
M4C1M
M4C1P
MCCC10
5
MCCC11
MCDC10
MCDC11
PWM Channel 10
PWM Channel 11
M5C0M
M5C0P
M5C1M
M5C1P
35.4.1.1.1 Dual Full H-Bridge Mode
PWM channel pairs x and x + 1 operate in dual full H-bridge mode if both channels are enabled
(MCCCx[MCAM]=0x1, 0x2, or 0x3) and the output mode bits MCCCx[MCOM] in both PWM channel
control registers are set to 0x3.
A typical configuration in dual full H-bridge mode is shown in Figure 35-17. PWM channel x drives the
PWM output signal on either MnC0P or MnC0M. If MnC0P drives the PWM signal, MnC0M will be
output either high or low depending on the MCCTL1[RECIRC] bit. If MnC0M drives the PWM signal,
MnC0P will be an output high or low. PWM channel x + 1 drives the PWM output signal on either MnC1P
or MnC1M. If MnC1P drives the PWM signal, MnC1M will be an output high or low. If MnC1M drives
the PWM signal, MnC1P will be an output high or low. This results in motor recirculation currents on the
high side drivers (MCCTL1[RECIRC] = 0) while the PWM signal is at a logic high level, or motor
recirculation currents on the low side drivers (MCCTL1[RECIRC] = 1) while the PWM signal is at a logic
low level. The pin driving the PWM signal is determined by the sign bit MCDCx[SIGN[4]] for the
corresponding channel and the state of the MCCTL1[RECIRC] bit. The value of the PWM duty cycle is
determined by the value of the duty cycle bits MCDCx[DUTY] for the corresponding channel.
Freescale Semiconductor
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
35-19