參數(shù)資料
型號(hào): M3720
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER and ON-SCREEN DISPLAY CONTROLLER
中文描述: 單芯片8位CMOS微機(jī)電壓合成器和屏幕顯示控制器
文件頁數(shù): 44/121頁
文件大?。?/td> 1907K
代理商: M3720
MITSUBISHI MICROCOMPUTERS
M37207MF-XXXSP/FP, M37207M8-XXXSP
M37207EFSP/FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
and ON-SCREEN DISPLAY CONTROLLER
44
A-D COMPARATOR
A-D comparator consists of 6-bit D-A converter and comparator. A-D
comparator block diagram is shown in Figure 40.
The reference voltage “V
ref
” for D-A conversion is set by bits 0 to 5 of
the A-D control register 2 (address 020A
16
).
The comparison result of the analog input voltage and the reference
voltage “V
ref
” is stored in bit 4 of the A-D control register 1 (address
00EF
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 the A-D control register 1 and write
the digital value corresponding to V
ref
to be compared to the bits 0 to
5 A-D control register 2. The voltage comparison starts by writing to
the A-D control register 2, and it is completed after 16 machine cycles
(NOP instruction
8).
Fig. 40. 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
AD7
AD8
相關(guān)PDF資料
PDF描述
M3720 1 KEY 1 SOUND
M3720-1 1 KEY 1 SOUND
M3720-10 1 KEY 1 SOUND
M3720-2 1 KEY 1 SOUND
M3720-3 1 KEY 1 SOUND
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M3720-1 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND
M3720-10 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND
M3720-2 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND
M3720-3 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND
M3720-4 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND