MC9S12P64VQK Freescale Semiconductor, MC9S12P64VQK Datasheet - Page 355

• Manufacturer Part Number: MC9S12P64VQK
• Description: 16-bit Microcontrollers - MCU 16 BIT 64K FLASH
• Manufacturer: Freescale Semiconductor

Specifications of MC9S12P64VQK

• Rohs: yes
• Core: S12
• Processor Series: MC9S12P
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 64 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 4 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 5 V
• Operating Temperature Range: - 40 C to 105 C
• Package / Case: QFP-80
• Mounting Style: SMD/SMT
• Interface Type: I2C, SCI, SPI
• Program Memory Type: Flash

10.4.2
The main part of the PWM module are the actual timers. Each of the timer channels has a counter, a period
register and a duty register (each are 8 bit). The waveform output period is controlled by a match between
the period register and the value in the counter. The duty is controlled by a match between the duty register
and the counter value and causes the state of the output to change during the period. The starting polarity
of the output is also selectable on a per channel basis.
10.4.2.1
Each PWM channel has an enable bit (PWMEx) to start its waveform output. When any of the PWMEx
bits are set (PWMEx = 1), the associated PWM output signal is enabled immediately. However, the actual
PWM waveform is not available on the associated PWM output until its clock source begins its next cycle
Freescale Semiconductor
Clock Source
PWMEx
(clock edge sync)
PWM Channel Timers
PWM Enable
GATE
Changing clock control bits while channels are operating can cause
irregularities in the PWM outputs.
up/down
reset
Figure 10-35. PWM Timer Channel Block Diagram
8-Bit Counter
PWMCNTx
Q
Q
S12P-Family Reference Manual, Rev. 1.13
T
R
NOTE
Figure 10-35
8-Bit Compare =
8-Bit Compare =
PWMDTYx
PWMPERx
CAEx
Pulse-Width Modulator (PWM8B6CV1) Block Description
shows a block diagram for PWM timer.
T
R
Q
Q
PPOLx
M
U
X
From Port PWMP
Data Register
M
U
X
To Pin
Driver
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