參數(shù)資料
型號(hào)： M37212EF-XXXFP
元件分類(lèi)： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP80
封裝： 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80
文件頁(yè)數(shù)： 26/67頁(yè)
文件大?。?/td> 4380K
代理商： M37212EF-XXXFP
MITSUBISHI MICROCOMPUTERS
M37212M4-XXXSP, M37212M6-XXXSP/FP
M37212EF-XXXSP/FP, M37212EFSP/FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
and ON-SCREEN DISPLAY CONTROLLER
32
A-D control register
Bit 1
0
1
0
1
Bit 0
0
1
0
1
0
1
A-D COMPARATOR
A-D comparator consists of 6-bit D-A converter and comparator. A-D
comparator block diagram is shown in Figure 30.
The reference voltage “Vref” for D-A conversion is set by bits 0 to 5 of
the A-D control register 2 (address 00EF16).
The comparison result of the analog input voltage and the reference
voltage “Vref” is stored in bit 4 of the A-D control register (address
00EE16).
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 mode register and write the
digital value corresponding to Vref to be compared to the bits 0 to 5
A-D control register. The voltage comparison starts by writing to the
A-D control register, and it is completed after 16 machine cycles (NOP
instruction ! 8).
Table 7. Relation between contents of A-D control register and
reference voltage “Vref”
Bit 4
0
1
Bit 3
0
1
Bit 2
0
1
Bit 5
0
1
1/128 VCC
3/128 VCC
5/128 VCC
123/128 VCC
125/128 VCC
127/128 VCC
Reference
voltage “Vref”
…
Fig. 28. Structure of A-D mode register
Fig. 29. Structure of A-D control register
Fig. 30. A-D comparator block diagram
0
7
A-D control register
(ADC: address 00EF16)
D-A converter set bits
Refer to Table 7.
A-D mode register
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 mode
register
P15/INT3/A-D1
P16/A-D2
P17/A-D3
P42/SIN/A-D5
P41/SCLK/A-D6
P40/SOUT(/IN)/A-D7
P10/OUT2/A-D8
P35/INT2/A-D3
Storage bit of comparison result
0 : Input voltage < reference voltage
1 : Input voltage > reference voltage
A-D mode register
(ADM: address 00EE16)
Analog input pin selection bits
b2 b1 b0
0
0 : A-D1
0
1 : A-D2
0
1
0 : A-D3
0
1
1 : A-D4
1
0
0 : A-D5
1
0
1 : A-D6
1
0 : A-D7
1
1 : A-D8
70
相關(guān)PDF資料
PDF描述
M37212EF-XXXSP 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP52
M37221M6-XXXSP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP42
M37224M3-XXXSP 8-BIT, MROM, 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
M37212M4 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37212M4-054SP 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37212M4-XXXSP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37212M6-XXXFP 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37212M6-XXXSP 制造商:RENESAS 制造商全稱(chēng):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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