參數(shù)資料
型號: MC68HC05BS8FB
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PQFP44
封裝: QFP-44
文件頁數(shù): 84/128頁
文件大小: 752K
代理商: MC68HC05BS8FB
MC68HC05BS8
MOTOROLA
7-3
PULSE WIDTH MODULATION
7
RSA and RSB are the output pins of the RSPWM. They are connected such that, one of them is
the PWM output waveform, while the other is always zero. This is controlled by the Raster Polarity
bit (RSP) in the RSPWM register.
PB7 must be congured as an input port pin and the CRE bit in GPWMR must be set before it can
be used as the input pin for the RSPWM reset signal. Figure 7-4 shows a block diagram of the
RSPWM.
Figure 7-3 RSPWM Timing Example
Figure 7-4 RSPWM Block Diagram
RSPWM
counter
RSPWM
output
Counter reset
(PB7)
Counter value matches
RSPWM register
&
RSA
PB7
RCLK
RSB
RSPWM counter
RSPW6:0
RSPWM logic
RSP
RSPWMR ($0011)
GPWMR bit 6
CRE
TPG
57
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