參數(shù)資料
型號： M37272MA-052SP
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
中文描述： 單芯片8位CMOS微機隱蔽字幕解碼器和屏幕顯示控制器
文件頁數(shù)： 46/131頁
文件大?。?/td> 1297K
代理商： M37272MA-052SP
46
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37272M6H/M8H/MAH/MFH–XXXSP/FP
M37272E8SP/FP, M37272EFSP/FP
MITSUBISHI MICROCOMPUTERS
Rev 1.0
8.8 A-D COMPARATOR
A-D comparator consists of 6-bit D-A converter and comparator. A-D
comparator block diagram is shown in Figure 8.8.1.
The reference voltage “V
ref
” for D-A conversion is set by bits 0 to 5 of
A-D control register 2 (address 00ED
16
).
The comparison result of the analog input voltage and the reference
voltage “V
ref
” is stored in bit 4 of A-D control register 1 (address
00EC
16
).
For A-D comparison, set “0” to corresponding bits of the direction
register to use ports as analog input pins. Write the data for select of
analog input pins to bits 0 to 2 of A-D control register 1 and write the
digital value corresponding to V
ref
to be compared to the bits 0
to 5 of A-D control register 2. The voltage comparison starts by writ-
ing to A-D control register 2, and it is completed after 16 machine
cycles (NOP instruction
8).
Fig. 8.8.1 A-D Comparator Block Diagram
A-D control register 1
Bits 0 to 2
Comparator control
Data bus
Bit 4
Switch tree
A-D control
register 2
Resistor ladder
Compa-
rator
Analog
signal
switch
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
A-D control
register 1
AD1
AD2
AD3
AD4
AD5
AD6
相關(guān)PDF資料
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參數(shù)描述
M37272MA-055SP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M37272MA-309SP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M37272MAH 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M37272MAH-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M37272MAH-XXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
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