16 FN7904.1 July 19, 2012 Write Operation A write operation to the ISL23428 is a two or more bytes operation. First, It requires the C" />
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  • 參數(shù)資料
    型號(hào): ISL23428UFVZ
    廠(chǎng)商: Intersil
    文件頁(yè)數(shù): 8/21頁(yè)
    文件大小: 0K
    描述: IC DGTL POT 2CH 50K 14TSSOP
    標(biāo)準(zhǔn)包裝: 960
    系列: XDCP™
    接片: 128
    電阻(歐姆): 50k
    電路數(shù): 2
    溫度系數(shù): 標(biāo)準(zhǔn)值 65 ppm/°C
    存儲(chǔ)器類(lèi)型: 易失
    接口: 4 線(xiàn) SPI(芯片選擇)
    電源電壓: 1.2 V ~ 5.5 V,1.7 V ~ 5.5 V
    工作溫度: -40°C ~ 125°C
    安裝類(lèi)型: 表面貼裝
    封裝/外殼: 14-TSSOP(0.173",4.40mm 寬)
    供應(yīng)商設(shè)備封裝: 14-TSSOP
    包裝: 管件
    ISL23428
    16
    FN7904.1
    July 19, 2012
    Write Operation
    A write operation to the ISL23428 is a two or more bytes
    operation. First, It requires the CS transition from HIGH-to-LOW.
    Then the host sends a valid Instruction Byte, followed by one or
    more Data Bytes to the SDI pin. The host terminates the write
    operation by pulling the CS pin from LOW-to-HIGH. Instruction is
    executed on the rising edge of CS (see Figure 27).
    Read Operation
    A Read operation to the ISL23428 is a four byte operation. First,
    It requires the CS transition from HIGH-to-LOW. Then the host
    sends a valid Instruction Byte, followed by a “dummy” Data Byte,
    NOP Instruction Byte and another “dummy” Data Byte to SDI pin.
    The SPI host receives the Instruction Byte (instruction code +
    register address) and requested Data Byte from SDO pin on the
    rising edge of SCK during third and fourth bytes, respectively. The
    host terminates the read by pulling the CS pin from LOW-to-HIGH
    (see Figure 28).
    FIGURE 27. TWO BYTE WRITE SEQUENCE
    CS
    SCK
    SDI
    SDO
    WR INSTRUCTION
    DATA BYTE
    1
    3
    4
    5
    7
    8
    9
    1011
    1213141516
    26
    ADDR
    FIGURE 28. FOUR BYTE READ SEQUENCE
    CS
    SCK
    SDI
    SDO
    RD
    ADDR
    NOP
    RD
    ADDR
    READ DATA
    1
    8
    16
    24
    32
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