參數(shù)資料
型號(hào)： M388504E6SS
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述： 單芯片8位CMOS微機(jī)
文件頁數(shù)： 30/51頁
文件大小： 736K
代理商： M388504E6SS
30
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Fig. 29 Structure of PWM control register
Fig. 30 PWM output timing when PWM register or PWM prescaler is changed
I
Note
The PWM starts after the PWM function enable bit is set to enable and “L” level is output from the PWM pin.
The length of this “L” level output is as follows:
sec
(Count source selection bit = 0, where n is the value set in the prescaler)
sec
(Count source selection bit = 1, where n is the value set in the prescaler)
n+1
2 f(X
IN
)
n+1
f(X
IN
)
PWM control register
(PWMCON : address 001D
16
)
PWM function enable bit
0: PWM disabled
1: PWM enabled
Count source selection bit
0: f(X
IN
) (f(X
CIN
) at low-speed mode)
1: f(X
IN
)/2 (f(X
CIN
)/2 at low-speed mode)
Not used (return “0” when read)
b7
b0
A
B
C
B
T
C
T2
=
PWM output
PWM register
write signal
PWM prescaler
write signal
(Changes “H” term from “A” to “B”.)
(Changes PWM period from “T” to “T2”.)
When the contents of the PWM register or PWM prescaler have changed, the PWM
output will change from the next period after the change.
T
T
T2
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