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  • 參數(shù)資料
    型號: LTC1298CS8
    廠商: LINEAR TECHNOLOGY CORP
    元件分類: ADC
    英文描述: Micropower Sampling 12-Bit A/D Converters In S0-8 Packages
    中文描述: 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8
    封裝: 0.150 INCH, PLASTIC, SO-8
    文件頁數(shù): 21/24頁
    文件大小: 418K
    代理商: LTC1298CS8
    21
    LTC1286/LTC1298
    LABEL MNEMONIC
    LDAA
    STAA
    LDAA
    STAA
    LDAA
    STAA
    LDAA
    STAA
    LDAA
    OPERAND
    #$50
    $1028
    #$1B
    $1009
    #$01
    $50
    #$A0
    $51
    #$00
    COMMENTS
    CONFIGURATION DATA FOR SPCR
    LOAD DATA INTO SPCR ($1028)
    CONFIG. DATA FOR PORT D DDR
    LOAD DATA INTO PORT D DDR
    LOAD DIN WORD INTO ACC A
    LOAD DIN DATA INTO $50
    LOAD DIN WORD INTO ACC A
    LOAD DIN DATA INTO $51
    LOAD DUMMY DIN WORD INTO
    ACC A
    LOAD DUMMY DIN DATA INTO $52
    LOAD INDEX REGISTER X WITH
    $1000
    D0 GOES LOW (CS GOES LOW)
    LOAD DIN INTO ACC A FROM $50
    LOAD DIN INTO SPI, START SCK
    CHECK SPI STATUS REG
    STAA
    LDX
    $52
    #$1000
    LOOP
    BCLR
    LDAA
    STAA
    LDAA
    $08,X,#$01
    $50
    $102A
    $1029
    WAIT1 BPL
    WAIT1
    $51
    $102A
    $1029
    WAIT2
    $102A
    $62
    $52
    CHECK IF TRANSFER IS DONE
    LOAD DIN INTO ACC A FROM $51
    LOAD DIN INTO SPI, START SCK
    CHECK SPI STATUS REG
    CHECK IF TRANSFER IS DONE
    LOAD LTC1291 MSBs INTO ACC A
    STORE MSBs IN $62
    LOAD DUMMY INTO ACC A
    FROM $52
    LOAD DUMMY DIN INTO SPI,
    START SCK
    CHECK SPI STATUS REG
    CHECK IF TRANSFER IS DONE
    DO GOES HIGH (CS GOES HIGH)
    LOAD LTC1291 LSBs IN ACC
    STORE LSBs IN $63
    START NEXT CONVERSION
    LDAA
    STAA
    WAIT2 LDAA
    BPL
    LDAA
    STAA
    LDAA
    STAA
    $102A
    WAIT3 LDAA
    $1029
    WAIT3
    $08,X#$01
    $102A
    $63
    LOOP
    BPL
    BSET
    LDAA
    STAA
    JMP
    LABEL MNEMONIC
    OPERAND
    COMMENTS
    Timing Diagram for Interface to the MC68HC11
    LTC1286/98 AI07
    DOUT FROM LTC1298 STORED IN MC68HC11 RAM
    MSB
    B2
    B1
    B0
    B3
    B4
    B6
    B7
    B5
    0
    0
    LSB
    #62
    #63
    0
    0
    B11
    B10
    B9
    B8
    CLK
    D
    OUT
    CS
    ANALOG
    INPUTS
    D0
    SCK
    MC68HC11
    MISO
    D
    IN
    LTC1298
    CH0
    CH1
    BYTE 1
    BYTE 2
    MOSI
    Hardware and Software Interface to the MC68HC11
    CS
    CLK
    D
    OUT
    MPU
    RECEIVED
    WORD
    LTC1286/98 AI06
    SGL/
    DIFF
    START
    B3
    B7
    B6
    B5
    B4
    B2
    B0
    B1
    B11
    B10
    B9
    B8
    D
    IN
    MPU
    TRANSMIT
    WORD
    BYTE 3 (DUMMY)
    BYTE 2
    0
    0
    0
    0
    SGL/
    DIFF
    1
    BYTE 1
    X
    ODD/
    SIGN
    MSBF
    X
    X
    X
    X
    0
    0
    0
    X
    X
    X
    X
    X
    X
    X
    X
    BYTE 3
    BYTE 2
    BYTE 1
    B11
    0
    B10
    B8
    B9
    B7
    B6
    B4
    B5
    B3
    B2
    B0
    B1
    DON'T CARE
    ODD/
    MSBF
    TYPICAL APPLICATIO
    S
    N
    U
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