XC68HC705F32 Motorola, XC68HC705F32 Datasheet - Page 125

• Manufacturer Part Number: XC68HC705F32
• Description: MICROCONTROLLER
• Manufacturer: Motorola

12.1
The pulse width modulator (PWM) system has three 8-bit channels (PWM1, PWM2, and PWM3).
The PWM has a programmable period of 256xT, where T can be E/2, E/4, and E/8 for an output
frequency of 4 KHz, 2KHz, and 1 KHz respectively with E = 2MHz. E is the internal bus frequency
fixed to half of the external oscillator frequency.
MC68HC05F32
PWM 8-bit counter
PWM introduction
PULSE WIDTH MODULATOR
PWM control
register
($0040)
PWM3 data ($0043)
PWM2 data ($0042)
PWM1 data ($0041)
Figure 12-1 PWM block diagram
PULSE WIDTH MODULATOR
0
0
12
0
POL3 POL2 POL1
RA1
Clock
RA0
MOTOROLA
E
PWM3/PE7
PWM2/PE6
PWM1PE5
TPG
12-1
12