參數(shù)資料
型號: HMS81C43XX
廠商: Hynix Semiconductor Inc.
英文描述: CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER FOR TELEVISION
中文描述: CMOS單芯片8位單片機(jī)電視
文件頁數(shù): 47/100頁
文件大小: 1943K
代理商: HMS81C43XX
HMS81C43xx / GMS87C4060
47
November 2001 ver 1.2
14. Pulse Width Modulation (PWM)
The PWM circuit is shown in Figure 14-1 , Figure .
The PWM circuit consists of the counter, comparator, Data
register.
The PWM control registers are PWMR7~0, PWMCR2~1,
PWM8H, PWM8L.
The more details about registers are shown Figure 14-2 .
Figure 14-1 8bit register (PWM7~0) circuit
Figure 14-2 14bit register (PWM8) circuit
Example
(f
ex
=8MHz)
14bit PWM
8bit PWM
Resolution
0.5uS
4uS
Input Clock
2MHz
250KHz
Frame cycle
8,192uS
1,024uS
PWMCR2 [EB
H
]
8bit counter
PWM0
PWMCR1 [EA
H
]
8bit comparator
PWMR0 [E0
H
]
E
E
E
E
E
E
PWMR1 [E1
H
]
PWMR2 [E2
H
]
PWMR3 [E3
H
]
PWMR4 [E4
H
]
PWMR5 [E5
H
]
PWM5
PWM4
PWM3
PWM2
PWM1
IF1Frame
PS5
CNTB
PWMCR2 [EB
H
]
14bit counter
PWM8
PWMCR1 [EA
H
]
14bit comparator
PWMR8H 8bit [E8
H
]
E
PS2
CNTB
PWMR8L 6bit [E9
H
]
MSB
LSB
I
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