參數(shù)資料
型號： MC68HC916X1CTH16
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, PQFP120
封裝： QFP-120
文件頁數(shù)： 164/172頁
文件大?。?/td> 1200K
代理商： MC68HC916X1CTH16
MC68HC916X1
MOTOROLA
MC68HC916X1TS/D
91
Figure 17 Pulse Accumulator Block Diagram
6.4 Pulse-Width Modulator
The pulse-width modulation submodule has two output pins. The outputs are periodic waveforms
controlled by a single frequency whose duty cycles can be independently selected and modified by
user software. Each PWM can be independently programmed to run in fast or slow mode. The PWM
unit has its own 16-bit free-running counter, which is clocked by an output of the nine-stage pres-
caler (the same prescaler used by the capture/compare unit) or by the clock input pin, PCLK.
Figure 18 displays a block diagram of the PWM unit.
EDGE
DETECT
LOGIC
PACNT
8-BIT COUNTER
2:1
MUX
PAI
ENABLE
OVERFLOW
10
11
INTERRUPT
REQUESTS
INTERNAL
DATA BUS
SYNCHRONIZER
&
DIGITAL FILTER
PACTL
TFLG2
TMSK2
MUX
PCLK
TCNT OVERFLOW
CAPTURE/COMPARE CLK
PRESCALER ÷ 512
PAOVI PAII
PAIS PAEN PAMOD PEDGE
PCLKS
PACLK1 PACLK0
PAOVF PAIF
16/32 PULSE ACC BLOCK
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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