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參數(shù)資料
| 型號： | LTC1291CCN8#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 5/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DATA ACQ SYSTEM 12BIT 8-DIP |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 類型： | 數(shù)據(jù)采集系統(tǒng)（DAS） |
| 分辨率（位）： | 12 b |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 電壓電源： | 單電源 |
| 電源電壓： | 5V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 8-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 8-PDIP |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1346 (CN2011-ZH PDF) |
13
LTC1291
1291fa
U
S
A
O
PPLICATI
WU
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I FOR ATIO
Sharing the Serial Interface
The LTC1291 can share the same 3-wire serial interface
with other peripheral components or other LTC1291s
LABEL MNEMONIC
OPERAND
COMMENTS
SETB
P1.4
CS GOES HIGH
CONT
MOV
A,#98H
DIN WORD FOR LTC1291
CLR
P1.4
CS GOES LOW
MOV
R4,#05H
LOAD COUNTER
LOOP1 RLC
A
ROTATE DIN BIT INTO CARRY
CLR
P1.3
CLK GOES LOW
MOV
P1.2,C
OUTPUT DIN BIT TO LTC1291
SETB
P1.3
CLK GOES HIGH
DJNZ
R4,LOOP1
NEXT DIN BIT
MOV
P1,#04H
P1.2 BECOMES AN INPUT
CLR
P1.3
CLK GOES LOW
MOV
R4,#09H
LOAD COUNTER
LOOP
MOV
C,P1.2
READ DATA BIT INTO CARRY
RLC
A
ROTATE DATA BIT (B3) INTO ACC
SETB
P1.3
CLK GOES HIGH
CLR
P1.3
CLK GOES LOW
DJNZ
R4,LOOP
NEXT DOUT BIT
MOV
R2,A
STORE MSBS IN R2
MOV
C,P1.2
READ DATA BIT INTO CARRY
SETB
P1.3
CLK GOES HIGH
LABEL MNEMONIC
OPERAND
COMMENTS
8051 Code
(Figure 3). The CS signals decide which LTC1291 is being
addressed by MPU.
Figure 3. Several LTC1291s Sharing One 3-Wire Serial Interface
LTC1291
2 CHANNELS
CS
3
3-WIRE SERIAL
INTERFACE TO OTHER
PERIPHERALS OR LTC1291s
2
10
OUTPUT PORT
SERIAL DATA
MPU
LTC1291 F03
LTC1291
CLR
P1.3
CLK GOES LOW
CLR
A
CLEAR ACC
RLC
A
ROTATE DATA BIT (B3) INTO ACC
MOV
C,P1.2
READ DATA BIT INTO CARRY
RLC
A
ROTATE DATA BIT (B2) INTO ACC
SETB
P1.3
CLK GOES HIGH
CLR
P1.3
CLK GOES LOW
MOV
C,P1.2
READ DATA BIT INTO CARRY
RLC
A
ROTATE DATA BIT (B1) INTO ACC
SETB
P1.3
CLK GOES HIGH
CLR
P1.3
CLK GOES LOW
MOV
C,P1.2
READ DATA BIT INTO CARRY
SETB
P1.4
CS GOES HIGH
RRC
A
ROTATE DATA BIT (B0) INTO ACC
RRC
A
ROTAGE RIGHT INTO ACC
RRC
A
ROTAGE RIGHT INTO ACC
RRC
A
ROTAGE RIGHT INTO ACC
MOV
R3,A
STORE LSBs IN R3
AJMP
CONT
START NEXT CONVERSION
In this example the input MUX is configured to accept a
differential input between CH0 and CH1. The result from
the conversion is clocked out MSB-first.
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