參數(shù)資料
型號(hào): MCP23008
廠商: Microchip Technology Inc.
英文描述: 8-Bit I/O Expander with Serial Interface
中文描述: 8位的I / O串行接口擴(kuò)展
文件頁數(shù): 17/40頁
文件大小: 498K
代理商: MCP23008
2005 Microchip Technology Inc.
DS21919B-page 17
MCP23008/MCP23S08
1.6.10
PORT (GPIO) REGISTER
The GPIO register reflects the value on the port.
Reading from this register reads the port. Writing to this
register modifies the Output Latch (OLAT) register.
REGISTER 1-10:
GPIO – GENERAL PURPOSE I/O PORT REGISTER (ADDR 0x09)
R/W-0
R/W-0
R/W-0
GP7
GP6
GP5
bit 7
R/W-0
GP4
R/W-0
GP3
R/W-0
GP2
R/W-0
GP1
R/W-0
GP0
bit 0
bit 7-0
GP7:GP0:
These bits
reflect the logic level on the pins <7:0>.
1
= Logic-high.
0
= Logic-low.
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
1
’ = Bit is set
U = Unimplemented bit, read as ‘
0
0
’ = Bit is cleared
x = Bit is unknown
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