參數(shù)資料
型號(hào)： M37221EF-XXXSP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP42
封裝： 0.600 INCH, 1.778 MM PITCH, SHRINK, PLASTIC, DIP-42
文件頁(yè)數(shù)： 25/63頁(yè)
文件大?。?/td> 1371K
代理商： M37221EF-XXXSP
M37221EF-XXXSP,M37221EFSP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
31
Fig. 27. 14-bit PWM output example (f(XIN) = 8 MHz)
0.25
s
b7
b0
b6 b5 b4 b3 b2 b1
0
010
11
0
b13
b6
0
101
10
b0
b5
101
000
Set “2C16” to DA-H register.
[DA-H
register]
DH
At writing of DA-L
b0
b6 b5 b4 b3 b2 b1
0
1
010
0
Set “2816” to DA-L register.
[DA-L register]
DL
At writing of DA-L
Undefined
These bits decide “H” level area of
fundamental waveform.
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
s!44
FF
00
D3
FE FD
D6
D4
02 01
D5
14-bit
PWM output
8-bit
counter
0.25
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
s!44
τ = 0.25s
T = 4096
s
Repeat period
t0
t1
t2
t3
t4
t5
t59
t60
t61
t62
t63
[DA latch]
…
b7
2C 2B 2A
03 02 01 00
2C 2B 2A
03 02 01 00
…
Minimum
resolution bit
width 0.25
s
0
…
相關(guān)PDF資料
PDF描述
M37221EFSP 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP42
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37221FP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37221M4H 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37221M4H-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37221M4H-XXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37221M6 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
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