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| 型號(hào)： | M37224M3-050SP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| 中文描述： | 單芯片8位CMOS微機(jī)電壓合成與屏幕顯示控制器 |
| 文件頁(yè)數(shù)： | 32/83頁(yè) |
| 文件大?。?/td> | 901K |
| 代理商： | M37224M3-050SP |
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M37224M3-XXXSP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
32
D-A CONVERTER
The M37224M3-XXXSP has 2 D-A converters with 6-bit resolution.
D-A converter block diagram is shown in Figure 30.
D-A conversion is performed by setting the value in the DA conver-
sion register. The result of D-A conversion is output from the DA pin
by setting “1” to the DA output enable bit of the port P3 output mode
control register (bits 2 and 3 at address 00CD
16
).
The output analog voltage V is determined with the value n (n: deci-
mal number) in the DA conversion register.
V = V
CC
n
128
The DA output does not build in a buffer, so connect an external
buffer when driving a low-impedance load.
D-A Conversion Register
Bit 5
0
0
0
0
Table 4. Relation between Contents of D-A Conversion Register and
Output Voltage
Bit 7
0
1
0
1
0
1
00
0/128 V
CC
00
1/128 V
CC
00
2/128 V
CC
125/128 V
CC
126/128 V
CC
127/128 V
CC
Output
Voltage “V”
…
…
1
1
1
…
Bit 4
0
0
1
1
1
…
Bit 3
0
0
0
1
1
1
…
Bit 2
0
0
0
1
1
1
…
Bit 1
0
0
0
1
1
1
…
Bit 0
0
0
1
0
1
1
…
Fig. 30. D-A Converter Block Diagram
Data bus
DA1 output enable bit
Resistor ladder
DA1 conversion register
DA1
(address 00DE
16
)
7
DA2
7
Resistor ladder
DA2 conversion register
(address 00DF
16
)
DA2 output enable bit
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參數(shù)描述 |
|---|---|
| M37224M3-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 |
| M37225ECSP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37225M6 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37225M8 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37225MA | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
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