參數資料
型號: M37630E4FP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PQFP44
封裝: 0.80 MM PITCH, PLASTIC, QFP-44
文件頁數: 28/37頁
文件大?。?/td> 777K
代理商: M37630E4FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
MITSUBISHI MICROCOMPUTERS
M37150M6/M8/MA/MC/MF-XXXFP, M37150EFFP
47
Rev. 1.0
8.8 A-D COMPARATOR
The A-D comparator consists of a 7-bit D-A converter and a com-
parator. The A-D comparator block diagram is shown in Figure 8.8.1.
The reference voltage “Vref” for D-A conversion is set by bits 0 to 6 of
A-D control register 2 (address 00ED16).
The comparison result of the analog input voltage and the reference
voltage “Vref” is stored in bit 4 of A-D control register 1 (address
00EC16).
For A-D comparison, set “0” to corresponding bits of the direction
register to use ports as analog input pins. Write the data to select
analog input pins for bits 0 to 2 of A-D control register 1 and write the
digital value corresponding to Vref to be compared to bits 0
to 4 of A-D control register 2. The voltage comparison is started by
writing 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 6
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PDF資料
PDF描述
M37630M4T-XXXFP 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP44
M37630E4FS 8-BIT, UVPROM, 10 MHz, MICROCONTROLLER, CQCC80
M37630E4T-XXXFP 8-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PQFP44
M37630E4FP 8-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PQFP44
M37640E8FP 8-BIT, OTPROM, 24 MHz, MICROCONTROLLER, PQFP80
相關代理商/技術參數
參數描述
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