參數(shù)資料
型號(hào): MCP23S18-E/SO
元件分類: 微控制器/微處理器
英文描述: PIA-GENERAL PURPOSE, PDSO28
封裝: 0.300 INCH, PLASTIC, SOIC-28
文件頁數(shù): 17/56頁
文件大?。?/td> 738K
代理商: MCP23S18-E/SO
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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