参数资料
型号: MC68HC05BS8FB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PQFP44
封装: PLASTIC, QFP-44
文件页数: 84/128页
文件大小: 9691K
代理商: MC68HC05BS8FB
MC68HC05BS8
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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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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