參數(shù)資料
型號(hào)： M37221EFSP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP42
封裝： 0.600 INCH, 1.778 MM PITCH, SHRINK, PLASTIC, DIP-42
文件頁(yè)數(shù)： 28/63頁(yè)
文件大?。?/td> 1371K
代理商： M37221EFSP
M37221EF-XXXSP,M37221EFSP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
34
0
7
DA1 conversion register
(DA1: address 00DE16)
DA2 conversion register
(DA2: address 00DF16)
DA conversion set bits
Refer to Table 8.
Fix this bit to “0.”
0
D-A CONVERTER
The M37221EF-XXXSP has 2 D-A converters with 6-bit resolution.
D-A converter block diagram is shown in Figure 34.
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 00CD16).
The output analog voltage V is determined with the value n (n: deci-
mal number) in the DA conversion register.
V = VCC !
(n = 0 to 63)
The DA output does not build in a buffer, so connect an external
buffer when driving a low-impedance load.
Fig. 32. Structure of D-A converter register
Fig. 34. D-A converter block diagram
D-A conversion register
Bit 1
0
1
0
1
Bit 0
0
1
0
1
0
1
Table 8. Relation between contents of D-A conversion register and
output voltage
Bit 4
0
1
Bit 3
0
1
Bit 2
0
1
Bit 5
0
1
0/64 VCC
1/64 VCC
2/64 VCC
61/64 VCC
62/64 VCC
63/64VCC
Output
voltage “V”
…
Fig. 33. Structure of port P3 output mode register
n
64
Data bus
DA1 output enable bit
Resistor ladder
DA1 conversion register
P30/A-D5/DA1
(address 00DE16)
6
P31/A-D6/DA2
6
Resistor ladder
DA2 conversion register
(address 00DF16)
DA2 output enable bit
P30 output structure selection bit
0 : CMOS output
1 : N-channel open-drain output
0
7
Port P3 output mode control
register
(P3S: address 00CD16)
P31 output structure selection bit
0 : CMOS output
1 : N-channel open-drain output
DA1 output enable bit
0 : P30 input/output
1 : DA1 output
DA2 output enable bit
0 : P31 input/output
1 : DA2 output
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37221FP 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
M37221M4H 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
M37221M4H-XXXFP 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
M37221M4H-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
M37221M6 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
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