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參數(shù)資料
| 型號(hào)： | M38858MC-XXXHP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80 |
| 文件頁(yè)數(shù)： | 71/105頁(yè) |
| 文件大?。?/td> | 1403K |
| 代理商： | M38858MC-XXXHP |
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3885 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
65
D-A CONVERTER
The 3885 group has two internal D-A converters (DA1 and DA2)
with 8-bit resolution.
The D-A converter is performed by setting the value in each D-A
conversion register. The result of D-A conversion is output from
the DA1 or DA2 pin by setting the DA output enable bit to “1”.
When using the D-A converter, the corresponding port direction
register bit (P56 for DA1 or P57 for DA2) must be set to “0” (input
status).
The output analog voltage V is determined by the value n (decimal
notation) in the D-A conversion register as follows:
V = VREF n/256 (n = 0 to 255)
Where VREF is the reference voltage.
At reset, the D-A conversion registers are cleared to “0016”, the
DA output enable bits are cleared to “0”, and the P56/DA1/PWM01
and P57/DA2/PWM11 pins become high impedance.
The DA output does not have buffers. Accordingly, connect an ex-
ternal buffer when driving a low-impedance load.
Fig. 62 Block diagram of D-A converter
Fig. 63 Equivalent connection circuit of D-A converter (DA1)
P56/DA1/PWM01
D-A1 conversion register (8)
R-2R resistor ladder
DA1 output enable bit
P57/DA2/PWM11
D-A2 conversion register (8)
R-2R resistor ladder
DA2 output enable bit
D
a
ta
b
u
s
AVSS
VREF
“0”
“1”
MSB
“0”
“1”
R
2R
R
2R
R
2R
R
2R
R
2R
R
2R
R
2R
LSB
2R
P56/DA1/PWM01
D-A1 conversion register
DA1 output enable bit
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| M38869MCA-XXXHP | 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP80 |
| M38869MFA-XXXGP | 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP80 |
| M38869MCA-XXXGP | 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP80 |
| M38869M8A-XXXGP | 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP80 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38858MD-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38858ME-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38858MF-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38859F1-HP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38859F2-HP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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