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    參數(shù)資料
    型號: MCP23S08-E/ML
    廠商: Microchip Technology
    文件頁數(shù): 8/44頁
    文件大小: 0K
    描述: IC I/O EXPANDER SPI 8B 20QFN
    標(biāo)準(zhǔn)包裝: 91
    接口: SPI
    輸入/輸出數(shù): 8
    中斷輸出:
    頻率 - 時鐘: 10MHz
    電源電壓: 1.8 V ~ 5.5 V
    工作溫度: -40°C ~ 125°C
    安裝類型: 表面貼裝
    封裝/外殼: 20-VFQFN 裸露焊盤
    供應(yīng)商設(shè)備封裝: 20-QFN 裸露焊盤(4x4)
    包裝: 托盤
    包括: POR
    產(chǎn)品目錄頁面: 684 (CN2011-ZH PDF)
    配用: GPIODM-KPLCD-ND - BOARD DEMO LCD GPIO EXP KEYPAD
    MCP23008/MCP23S08
    DS21919E-page 16
    2007 Microchip Technology Inc.
    1.6.7
    PULL-UP RESISTOR
    CONFIGURATION (GPPU)
    REGISTER
    The GPPU register controls the pull-up resistors for the
    port pins. If a bit is set and the corresponding pin is
    configured as an input, the corresponding port pin is
    internally pulled up with a 100 k
    Ω resistor.
    REGISTER 1-7:
    GPPU – GPIO PULL-UP RESISTOR REGISTER (ADDR 0x06)
    R/W-0
    PU7
    PU6
    PU5
    PU4
    PU3
    PU2
    PU1
    PU0
    bit 7
    bit 0
    Legend:
    R = Readable bit
    W = Writable bit
    U = Unimplemented bit, read as ‘0’
    -n = Value at POR
    ‘1’ = Bit is set
    ‘0’ = Bit is cleared
    x = Bit is unknown
    bit 7-0
    PU7:PU0: These bits control the weak pull-up resistors on each pin (when configured as an input)
    <7:0>.
    1 = Pull-up enabled.
    0 = Pull-up disabled.
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