mc68hc908mr32 Freescale Semiconductor, Inc, mc68hc908mr32 Datasheet - Page 146

• Manufacturer Part Number: mc68hc908mr32
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Pulse-Width Modulator for Motor Control (PWMMC)
12.9.4 PWM Control Register 1
PWM control register 1 (PCTL1) controls PWM enabling/disabling, the loading of new modulus, prescaler,
PWM values, and the PWM correction method. In addition, this register contains the software disable bits
to force the PWM outputs to their inactive states (according to the disable mapping register).
DISX — Software Disable Bit for Bank X Bit
DISY — Software Disable Bit for Bank Y Bit
PWMINT — PWM Interrupt Enable Bit
PWMF — PWM Reload Flag
ISENS1 and ISENS0 — Current Sense Correction Bits
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This read/write bit allows the user to disable one or more PWM pins in bank X. The pins that are
disabled are determined by the disable mapping write-once register.
This read/write bit allows the user to disable one or more PWM pins in bank Y. The pins that are
disabled are determined by the disable mapping write-once register.
This read/write bit allows the user to enable and disable PWM CPU interrupts. If set, a CPU interrupt
will be pending when the PWMF flag is set.
This read/write bit is set at the beginning of every reload cycle regardless of the state of the LDOK bit.
This bit is cleared by reading PWM control register 1 with the PWMF flag set, then writing a logic 0 to
PWMF. If another reload occurs before the clearing sequence is complete, then writing logic 0 to
PWMF has no effect.
These read/write bits select the top/bottom correction scheme as shown in
1 = Disable PWM pins in bank X.
0 = Re-enable PWM pins at beginning of next PWM cycle.
1 = Disable PWM pins in bank Y.
0 = Re-enable PWM pins at beginning of next PWM cycle.
1 = Enable PWM CPU interrupts.
0 = Disable PWM CPU interrupts.
1 = New reload cycle began.
0 = New reload cycle has not begun.
Address:
Reset:
When PWMINT is cleared, pending CPU interrupts are inhibited.
When PWMF is cleared, pending PWM CPU interrupts are cleared (not
including fault interrupts).
Read:
Write:
$0020
DISX
Bit 7
0
Figure 12-39. PWM Control Register 1 (PCTL1)
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
DISY
6
0
PWMINT
5
0
PWMF
NOTE
NOTE
4
0
ISENS1
3
0
ISENS0
2
0
LDOK
1
0
Table
Freescale Semiconductor
PWMEN
12-7.
Bit 0
0