• 參數(shù)資料
    型號: MCP23017T-E/ML
    廠商: Microchip Technology
    文件頁數(shù): 7/48頁
    文件大?。?/td> 0K
    描述: IC I/O EXPANDER I2C 16B 28QFN
    標(biāo)準(zhǔn)包裝: 1,600
    接口: I²C
    輸入/輸出數(shù): 16
    中斷輸出:
    頻率 - 時鐘: 1.7MHz
    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: 28-VQFN 裸露焊盤
    供應(yīng)商設(shè)備封裝: 28-QFN(6x6)
    包裝: 帶卷 (TR)
    配用: MCP23X17EV-ND - BOARD EVAL FOR MCP23X17
    GPIODM-KPLCD-ND - BOARD DEMO LCD GPIO EXP KEYPAD
    2007 Microchip Technology Inc.
    DS21952B-page 15
    MCP23017/MCP23S17
    1.6.4
    DEFAULT COMPARE REGISTER
    FOR INTERRUPT-ON-CHANGE
    The default comparison value is configured in the
    DEFVAL register. If enabled (via GPINTEN and
    INTCON) to compare against the DEFVAL register, an
    opposite value on the associated pin will cause an
    interrupt to occur.
    REGISTER 1-4:
    DEFVAL – DEFAULT VALUE REGISTER (ADDR 0x03)
    R/W-0
    DEF7
    DEF6
    DEF5
    DEF4
    DEF3
    DEF2
    DEF1
    DEF0
    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
    DEF7:DEF0: These bits set the compare value for pins configured for interrupt-on-change from
    defaults <7:0>. Refer to INTCON.
    If the associated pin level is the opposite from the register bit, an interrupt occurs.
    Refer to INTCON and GPINTEN.
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