參數資料
型號: M68HC16Y1CFC
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, MICROCONTROLLER, PQFP16
封裝: QFP-160
文件頁數: 121/138頁
文件大小: 784K
代理商: M68HC16Y1CFC
MC68HC16Y1
MOTOROLA
MC68HC16Y1TS/D
83
Figure 11 Prescaler Block Diagram
5.2 Pulse-Width Modulator
The pulse-width modulation submodule has two output pins. The outputs are periodic waveforms con-
trolled by a single frequency whose duty cycles may 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 prescaler (the same
prescaler used by the compare/capture unit) or by the clock input pin, PCLK. A block diagram of the
PWM submodule follows.
TO PULSE ACCUMULATOR
CPR2 CPR1 CPR0
PPR2 PPR1 PPR0
TO PULSE ACCUMULATOR
TO
PWM UNIT
TO CAPTURE/
COMPARE
TIMER
SELECT
SYNCHRONIZER AND
DIGITAL FILTER
PCLK
PIN
DIVIDER
÷256
÷128
÷64
÷32
÷16
÷8
÷4
EXT
÷128
÷64
÷32
÷16
÷8
÷4
÷2
EXT
SYSTEM CLOCK
÷512
EXT
÷256
÷128
÷64
÷32
÷16
÷8
÷4
÷512
÷2
GPT PRESCALER BLOCK
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