參數(shù)資料
型號： MCP23018-E/MJ
廠商： Microchip Technology
文件頁數(shù)： 17/56頁
文件大?。?/td> 0K
描述： IC I/O EXPANDER I2C 16B 24QFN
標(biāo)準(zhǔn)包裝： 91
接口： I²C
輸入/輸出數(shù)： 16
中斷輸出： 是
頻率 - 時鐘： 3.4MHz
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： 24-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 24-QFN 裸露焊盤（4x4）
包裝： 管件
產(chǎn)品目錄頁面： 684 (CN2011-ZH PDF)
MCP23018/MCP23S18
DS22103A-page 24
2008 Microchip Technology Inc.
REGISTER 1-8:
IOCON – I/O EXPANDER CONFIGURATION REGISTER
R/W-0
U-0
R/W-0
BANK
MIRROR
SEQOP
-
ODR
INTPOL
INTCC
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
BANK: Controls how the registers are addressed (see Figure 1-4 and Figure 1-5)
1 = The registers associated with each port are separated into different banks
0 = The registers are in the same bank (addresses are sequential)
bit 6
MIRROR: INT pins mirror bit
1 = The INT pins are internally connected in a wired OR configuration
0 = The INT pins are not connected. INTA is associated with Port A and INTB is associated with Port B
bit 5
SEQOP: Sequential Operation mode bit.
1
= Sequential operation disabled, address pointer does not increment.
0
= Sequential operation enabled, address pointer increments.
bit 4
Unimplemented: Reads as 0
bit 3
Unimplemented: Reads as 0
bit 2
ODR: Configures the INT pin as an open-drain output.
1
= Open-drain output (overrides the INTPOL bit).
0
= Active driver output (INTPOL bit sets the polarity).
bit 1
INTPOL: Sets the polarity of the INT output pin.
1
= Active-high.
0
= Active-low.
bit 0
INTCC: Interrupt Clearing Control
1 = Reading INTCAP register clears the interrupt
0 = Reading GPIO register clears the interrupt
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