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參數(shù)資料
| 型號(hào)： | M37560MFA-XXXFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100 |
| 文件頁(yè)數(shù)： | 35/71頁(yè) |
| 文件大?。?/td> | 993K |
| 代理商： | M37560MFA-XXXFP |
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Rev.1.02
Jul 31, 2003
page 40 of 69
7560 Group (A version)
D-A Converter
The 7560 group has a D-A converter with 8-bit resolution and 2
channels (DA1, DA2).
The D-A converter is started by setting the value in the D-A con-
version register. When the DA1 output enable bit or the DA2 output
enable bit is set to “1”, the result of D-A conversion is output from
the corresponding DA pin. When using the D-A converter, set the
P56/DA1 pin and the P57/DA2 pin to input mode (set “0” to bits 6,
7 of port P5 direction register) and the pull-up resistor should be in
the OFF state (set “0” to bit 3 of PULL register B) previously.
The output analog voltage V is determined by the value n (base
10) 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 set to “0016”, the DA1
output enable bit and the DA2 output enable bit are set to “0”, and
the P56/DA1 pin and the P57/DA2 pin goes to high impedance
state. The DA converter is not buffered, so connect an external
buffer when driving a low-impedance load.
■ Note on applied voltage to VREF pin
When these pins are used as D-A conversion output pins, the Vcc
level is recommended for the applied voltage to VREF pin.
When the voltage below Vcc level is applied, the D-A conversion
accuracy may be worse.
Fig. 41 Structure of D-A control register
Fig. 42 Block diagram of D-A converter
DA1 output enable bit
0 : Disabled
1 : Enabled
DA2 output enable bit
0 : Disabled
1 : Enabled
Not used (“0” at reading)
(Write “0” to these bits at writing.)
b7
b0
D-A control register
(DACON : address 003616)
000 000
Data bus
P56/DA1
D-A1 conversion register (8)
R-2R resistor ladder
DA1 output enable bit
(DA1: address 003216)
P57/DA2
D-A2 conversion register (8)
R-2R resistor ladder
DA2 output enable bit
(DA2: address 003316)
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| M37560MFA-XXXGP | 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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| M37560MFD-XXXGP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37560MF-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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