參數(shù)資料
型號(hào): ADC0838CCV
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: ADC
英文描述: 8-Bit Serial I/O A/D Converters with Multiplexer Options
中文描述: 8-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC20
封裝: PLASTIC, LCC-20
文件頁(yè)數(shù): 16/26頁(yè)
文件大?。?/td> 410K
代理商: ADC0838CCV
ML2281, ML2282, ML2284, ML2288
16
APPLICATIONS
8051 Interface and Controlling Software
MNEMONIC
INSTRUCTION
START
ANL
MOV
MOV
P1, #0F7H
B, #5
A, #ADDR
;SELECT A/D (CS = 0)
;BIT COUNTER
5
;A
MUX BIT
LOOP 1:
RRC
JC
A
ONE
;CY
ADDRESS BIT
;TEST BIT
;BIT = 0
ZERO:
ANL
SJMP
P1, #0FEH
CONT
;DI
0
;CONTINUE
;BIT = 1
ONE:
ORL
P1, #1
;D1
1
CONT:
ACALL
DJNZ
ACALL
MOV
PULSE
B, LOOP 1
PULSE
B, #8
;PULSE SK 0
1
0
;CONTINUE UNTIL DONE
;EXTRA CLOCK FOR SYNC
;BIT COUNTER
8
LOOP 2:
ACALL
MOV
RRC
RRC
MOV
RLC
MOV
DJNZ
PULSE
A, P1
A
A
A, C
A
C, A
B, LOOP 2
;PULSE SK 0
1
0
;CY
DO
;A
RESULT
;A(0) BIT
AND SHIFT
;C
RESULT
;CONTINUE UNTIL DONE
RETI
;PULSE SUBROUTINE
PULSE:
ORL
NOP
ANL
RET
P1, #04
;SK
1
;DELAY
;SK
0
P1, #0FBH
CH0
ML2288
8051
P1
3
P1
2
P1
1
P1
0
CS
CLK
DI
DO
CH7
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