參數(shù)資料
型號(hào)： ADC0831
廠商： National Semiconductor Corporation
元件分類： 串行ADC
英文描述： 8-Bit Serial I/O A/D Converters with Multiplexer Options(8位串行輸入/輸出帶多路選擇A/D轉(zhuǎn)換器)
中文描述： 8位串行I /辦公自動(dòng)化/ D的多路選擇器（8位串行輸入/輸出帶多路選擇的A / D轉(zhuǎn)換器）
文件頁(yè)數(shù)： 19/32頁(yè)
文件大?。?/td> 678K
代理商： ADC0831
Applications
(Continued)
COP CODING EXAMPLE
Mnemonic
LEI
SC
OGI
CLR A
AISC 1
XAS
Instruction
ENABLES SIO’s INPUT AND OUTPUT
C = 1
G0=0 (CS =0)
CLEARS ACCUMULATOR
LOADS ACCUMULATOR WITH 1
EXCHANGES SIO WITH
ACCUMULATOR
AND STARTS SK CLOCK
LOADS MUX ADDRESS FROM RAM
INTO ACCUMULATOR
—
LOADS MUX ADDRESS FROM
ACCUMULATOR TO SIO REGISTER
↑
8 INSTRUCTIONS
↓
READS HIGH ORDER NIBBLE (4 BITS)
INTO ACCUMULATOR
PUTS HIGH ORDER NIBBLE INTO RAM
CLEARS ACCUMULATOR
C = 0
READS LOW ORDER NIBBLE INTO
ACCUMULATOR AND STOPS SK
PUTS LOW ORDER NIBBLE INTO RAM
G0=1 (CS =1)
DISABLES SIO’s INPUT AND OUTPUT
LDD
NOP
XAS
XAS
XIS
CLR A
RC
XAS
XIS
OGI
LEI
8048 CODING EXAMPLE
Mnemonic
ANL
Instruction
START:
P1,
#
0F7H
B,
#
5
A,
#
ADDR
A
ONE
;SELECT A/D (CS =0)
MOV
MOV
;BIT COUNTER
←
5
;A
←
MUX ADDRESS
LOOP 1:
RRC
JC
;CY
←
ADDRESS BIT
;TEST BIT
;BIT=0
;DI
←
0
ZERO:
ANL
P1,
#
0FEH
CONT
JMP
;CONTINUE
;BIT=1
;DI
←
1
;PULSE SK 0
→
1
→
0
;CONTINUE UNTIL
DONE
;EXTRA CLOCK FOR
SYNC
;BIT COUNTER
←
8
;PULSE SK 0
→
1
→
0
;CY
←
DO
ONE:
CONT:
ORL
CALL
DJNZ
P1,
#
1
PULSE
B, LOOP
1
PULSE
CALL
MOV
CALL
IN
RRC
RRC
MOV
RLC
MOV
DJNZ
B,
#
8
PULSE
A, P1
A
A
A, C
A
C, A
B, LOOP
2
LOOP 2:
;A
←
RESULT
;A(0)
←
BIT AND SHIFT
;C
←
RESULT
;CONTINUE UNTIL
DONE
RETR
;PULSE SUBROUTINE
;SK
←
1
;DELAY
;SK
←
0
PULSE:
ORL
NOP
ANL
P1,
#
04
P1,
#
0FBH
RET
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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