mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 217

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

13.9 I/O Signals
13.10 I/O Registers
13.10.1 PWM Control Register (PWMCR)
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
Address:
The PWM module has three output pins shared with port C:
PTC0/PWM0/CD, PWM1/PTC1, and PTC2/PWM2. PTC0 is also shared
with current flow detect output, CD, of the analog module, see (see 18.5
Port C).
These I/O registers control PWM operation:
The PWM control register (PWMCR) enables/disables the independent
PWM counters and port pins used for the PWM channels.
PWMEN2–PWMEN0 — PWM Enable Bits
Reset:
Read:
Write:
•
•
•
•
Writing a 0 to the PWMENx bit clears the corresponding PWM counter
and force the PWM channel x output to 0. Reset clears these bits.
1 = PWM channel x enabled
0 = PWM channel x is disabled; PWM counter cleared to zero and
PWM control register (PWMCR)
PWM clock control register (PWMCCR)
PWM phase control register (PWMPCR)
Three PWM data registers (PWMDR0–PWMDR2)
PWMEN2 PWMEN1 PWMEN0
$0051
PWM channel x output forced to zero
0
Figure 13-5. PWM Control Register (PWMCR)
Pulse Width Modulator (PWM)
= Unimplemented
0
0
0
0
0
0
Pulse Width Modulator (PWM)
PCH2
0
PCH1
0
Data Sheet
I/O Signals
PCH0
0
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