參數(shù)資料
型號(hào): MC68HC05BD3
廠商: Motorola, Inc.
英文描述: 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述: 8位微控制器單元(MCU)。(8位微控制器)
文件頁數(shù): 46/112頁
文件大小: 676K
代理商: MC68HC05BD3
MOTOROLA
6-2
MC68HC05BD3
PULSE WIDTH MODULATION
6
The value of each PWM Data Register is continuously compared with the content of an internal
counter to determine the state of each PWM channel output pin. Double buffering is not used in
this PWM design.
Figure 6-1
8-Bit PWM Output Waveforms
M=$00
32T=16
μ
s
M=$01
M=$0F
M=$1F
T=1 CPU clock period (0.5
μ
s if CPU clock=2MHz)
M = value set in 5-bit PWM (bit3-bit7)
N = value set in 3-bit BRM (bit0-bit2)
Pulse inserted at end of PWM cycle
depends on setting of N.
N
PWM cycles where pulses are inserted in a 8-cycle frame
Number of inserted
pulses in a 8-cycle frame
1
2
4
xx1
x1x
1xx
4
2, 6
1, 3, 5, 7
31T
16T
16T
31T
T
T
TPG
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