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参数资料
| 型号： | ADC0844 |
| 厂商： | National Semiconductor Corporation |
| 元件分类： | 串行ADC |
| 英文描述： | 8-Bit uP Compatible A/D Converters with Multiplexer Options |
| 中文描述： | 8位的兼容的A / D转换器和多路复用器选项 |
| 文件页数： | 17/20页 |
| 文件大小： | 467K |
| 代理商： | ADC0844 |
Applications Information
(Continued)
SAMPLE PROGRAM FOR ADC0844— INS8039 INTERFACE
CONVERTING TWO RATIOMETRIC, DIFFERENTIAL SIGNALS
(Continued)
0054
0056
0057
0059
005A
32 53
81
89 01
A0
83
JB1
MOVX
ORL
MOV
RET
LOOP
A,
@
R1
P1,&01H
@
R0,A
;IF INTR = 1 GOTO LOOP
;IF INTR = 0 INPUT A/D DATA
;CLEAR THE A/D CHIP SELECT
;STORE THE A/D DATA
;RETURN TO MAIN PROGRAM
SAMPLE PROGRAM FOR ADC0848— NSC800 INTERFACE
0008
000F
001F
3C00
NCONV
DEL
CS
ADDTA
EQU
EQU
EQU
EQU
16
15
1FH
003CH
;DELAY 50 μsec CONVERSION
;THE BOARD ADDRESS
;START OF RAM FOR A/D
;DATA
;MUX DATA
0000'
0004'
0008'
000A'
000C'
000F'
0012'
08 09 0A 0B
0C 0D 0E 0F
0E 1F
06 16
21 0000'
11 003C
ED A3
MUXDTA:
DB
DB
LD
LD
LD
LD
OUTI
08H,09H,0AH,0BH
0CH,0DH,0EH,0FH
C,CS
B,NCONV
HL,MUXDTA
DE,ADDTA
START:
STCONV:
;LOAD A/D’S MUX DATA
;AND START A CONVERSION
;HL=RAM ADDRESS FOR THE
;A/D DATA
0014'
EB
EX
DE,HL
0015'
0017'
0018'
001B'
3E 0F
3D
C2 0013'
ED A2
LD
DEC
JP
INI
A,DEL
A
NZ,WAIT
WAIT:
;WAIT 50 μsec FOR THE
;CONVERSION TO FINISH
;STORE THE A/D’S DATA
;CONVERTED ALL INPUTS
001D'
001E'
EB
C2 000E'
EX
JP
DE,HL
NZ,STCONV
;IF NOT GOTO STCONV
END
Note 14:
This routine sequentially programs the MUX data latch in the signal-ended mode. For CH1-CH8 a conversion is started, then a 50 μs wait for the A/D to
complete a conversion and the data is stored at address ADDTA for CH1, ADDTA + 1 for CH2, etc.
I/O Interface to NSC800
DS005016-28
www.national.com
17
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PDF描述 |
|---|---|
| ADC0844BCN | 8-Bit uP Compatible A/D Converters with Multiplexer Options |
| ADC0844CCJ | 8-Bit uP Compatible A/D Converters with Multiplexer Options |
| ADC0844CCN | 8-Bit uP Compatible A/D Converters with Multiplexer Options |
| ADC0848 | 8-Bit uP Compatible A/D Converters with Multiplexer Options |
| ADC0848BCN | 8-Bit uP Compatible A/D Converters with Multiplexer Options |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADC0844BCJ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:IC-8-BIT ADC |
| ADC0844BCJ/A+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog-to-Digital Converter， 8-Bit |
| ADC0844BCN | 制造商:National Semiconductor Corporation 功能描述:Analog Digital Converter, Single, 8 Bit, 20 Pin, DIP |
| ADC0844BCN/A+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog-to-Digital Converter， 8-Bit |
| ADC0844BCN/B+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog-to-Digital Converter， 8-Bit |
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