參數(shù)資料
型號(hào): M37224M3
廠商: Mitsubishi Electric Corporation
英文描述: Single Chip 8 Bits Microcomputer(8位單片機(jī))
中文描述: 單芯片8位單片機(jī)(8位單片機(jī))
文件頁數(shù): 28/83頁
文件大小: 901K
代理商: M37224M3
M37224M3-XXXSP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
28
Fig. 24. 14-bit PWM Output Example (f(X
IN
) = 8 MHz)
0.25
μ
s
b7
0
b0
0
b6 b5 b4 b3 b2 b1
0
1
0
1
1
0
b13
0
b6
0
0
1
0
1
1
0
b0
0
b5
1
0
1
0
0
Set “2C
16
” to DA-H register.
[DA-H
register]
D
H
At writing of DA-L
b0
0
b6 b5 b4 b3 b2 b1
1
0
1
0
0
Set “28
16
” to DA-L register.
[DA-L register]
D
L
At writing of DA-L
Undefined
These bits decide “H” level area of
fundamental waveform.
Minimum
resolution bit
width 0.25
μ
s
These bits decide smaller interval “tm” in which “H” leval
area is [“H” level area of fundamental waveform +
τ
].
=
High-order 8-bit
value of DA latch
“H” level area of
fundamental waveform
FF
00
D3
FE FD…
D6
D4
02 01
D5
14-bit
PWM output
8-bit
counter
0.25
μ
s
44
FF
00
D3
FE FD
D6
D4
02 01
D5
14-bit
PWM output
8-bit
counter
0.25
μ
s
45
Fundamental
waveform
Waveform of smaller interval “tm” specified by low-order 6 bits
Fundamental waveform of smaller interval
“tm” which is not specified by low-order 6
bits is not changed.
14-bit PWM output
Low-order 6-bit output of
DA latch
0.25
μ
s
44
τ
= 0.25
μ
s
T
=
4096
μ
s
Repeat period
t
0
t
1
t
2
t
3
t
4
t
5
t
59
t
60
t
61
t
62
t
63
[DA latch]
b7
2C 2B 2A
03 02 01 00
2C 2B 2A
03 02 01 00
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