ADC0848BCJ National Semiconductor, ADC0848BCJ Datasheet - Page 18

• 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

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0000
0010
0012
0014
0016
0018
001A
001C
001D
0050
0052
0053
0054
0056
0057
0059
005A
04 10
B9 FF
B8 20
89 FF
23 00
14 50
23 02
18
14 50
99 FE
91
09
32 53
81
89 01
A0
83
BEGIN:
CONV:
LOOP:
CONVERTING TWO RATIOMETRIC, DIFFERENTIAL SIGNALS
SAMPLE PROGRAM FOR ADC0844—INS8039 INTERFACE
ORG
JMP
ORG
MOV
MOV
ORL
MOV
CALL
MOV
INC
CALL
;CONTINUE MAIN PROGRAM
;CONVERSION SUBROUTINE
;ENTRY:ACC—A/D MUX DATA
;EXIT: ACC—CONVERTED DATA
ORG
ANL
MOVX
IN
JB1
MOVX
ORL
MOV
RET
ADC0844—INS8039 Interface
0H
BEGIN
10H
R1,#0FFH
R0,#20H
P1,#0FFH
A,00H
CONV
A,#02H
R0
CONV
50H
P1,#0FEH
@R1,A
A,P1
LOOP
A,@R1
P1,&01H
@R0,A
18
;START PROGRAM AT ADDR 10
;MAIN PROGRAM
;LOAD R1 WITH A UNUSED ADDR
;LOCATION
;A/D DATA ADDRESS
;SET PORT 1 OUTPUTS HIGH
;LOAD THE ACC WITH A/D MUX DATA
;CH1 AND CH2 DIFFERENTIAL
;CALL THE CONVERSION SUBROUTINE
;LOAD THE ACC WITH A/D MUX DATA
;CH3 AND CH4 DIFFERENTIAL
;INCREMENT THE A/D DATA ADDRESS
;CALL THE CONVERSION SUBROUTINE
;CHIP SELECT THE A/D
;LOAD A/D MUX & START CONVERSION
;INPUT INTR STATE
;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
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