參數(shù)資料
型號(hào): MC68HC05SB7
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝: MO-150, SSOP-28
文件頁數(shù): 144/170頁
文件大小: 2161K
代理商: MC68HC05SB7
August 27, 1998
GENERAL RELEASE SPECIFICATION
MC68HC05SB7
PULSE WIDTH MODULATOR
MOTOROLA
REV 2.1
11-1
SECTION 11
PULSE WIDTH MODULATOR
The PWM subsystem contains four 10-bit PWM channels, which can be used as
independent D/A converters. Figure 11-1 shows the block diagram for the Pulse
Width Modulator, with channel 0 in details.
Figure 11-1. PWM Block Diagram
The PWM cycle time is 2048 times the MCU internal processor clock (fOP or fBUS).
Duty cycle of the PWM outputs can be programmed by the corresponding D/A
Data Registers (DAC0-DAC3).
Zero
Detector
Internal Bus
10-bit D/A 0
Data Register
10-bit D/A 0
Data Register
Buffer
Comparator
10-bit Counter
D/A 0 Multiplexer
PWM0
pin
S
R
Latch
fOP ÷ 2
Channel 0
To
Channel 1
To
Channel 2
To
Channel 3
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