ADC0848BCJ National Semiconductor, ADC0848BCJ Datasheet - Page 19

• Manufacturer Part Number: ADC0848BCJ
• Description: IC ADC 8BIT MPU W/MUX OPT 20CDIP
• Manufacturer: National Semiconductor

Specifications of ADC0848BCJ

• Number Of Bits: 8
• Sampling Rate (per Second): 25k
• Data Interface: Parallel
• Number Of Converters: 1
• Power Dissipation (max): 875mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 20-CDIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *ADC0848BCJ

0008
000F
001F
3C00
0000
0004
0008
000A
000C
000F
0012
0014
0015
0017
0018
001B
001D
001E
Note 15: 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.
′
′
′
′
′
′
′
′
′
′
′
′
′
′
08 09 0A 0B
0C 0D 0E 0F
0E 1F
06 16
21 0000
11 003C
ED A3
EB
3E 0F
3D
C2 0013
ED A2
EB
C2 000E
′
′
′
NCONV
DEL
CS
ADDTA
MUXDTA:
START:
STCONV:
WAIT:
SAMPLE PROGRAM FOR ADC0848—NSC800 INTERFACE
EQU
EQU
EQU
EQU
DB
DB
LD
LD
LD
LD
OUTI
EX
LD
DEC
JP
INI
EX
JP
END
I/O Interface to NSC800
16
15
1FH
003CH
08H,09H,0AH,0BH
0CH,0DH,0EH,0FH
C,CS
B,NCONV
HL,MUXDTA
DE,ADDTA
DE,HL
A,DEL
A
NZ,WAIT
DE,HL
NZ,STCONV
19
;DELAY 50 μsec CONVERSION
;THE BOARD ADDRESS
;START OF RAM FOR A/D
;DATA
;MUX DATA
;LOAD A/D'S MUX DATA
;AND START A CONVERSION
;HL=RAM ADDRESS FOR THE
;A/D DATA
;WAIT 50 μsec FOR THE
;CONVERSION TO FINISH
;STORE THE A/D'S DATA
;CONVERTED ALL INPUTS?
;IF NOT GOTO STCONV
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