參數(shù)資料
型號: MCP23017T-E/SO
元件分類: 微控制器/微處理器
英文描述: 16 I/O, PIA-GENERAL PURPOSE, PDSO28
封裝: 7.50 MM, PLASTIC, SOIC-28
文件頁數(shù): 4/48頁
文件大小: 915K
代理商: MCP23017T-E/SO
MCP23017/MCP23S17
DS21952B-page 12
2007 Microchip Technology Inc.
1.6.1
I/O DIRECTION REGISTER
Controls the direction of the data I/O.
When a bit is set, the corresponding pin becomes an
input. When a bit is clear, the corresponding pin
becomes an output.
REGISTER 1-1:
IODIR – I/O DIRECTION REGISTER (ADDR 0x00)
R/W-1
IO7
IO6
IO5
IO4
IO3
IO2
IO1
IO0
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
IO7:IO0: These bits control the direction of data I/O <7:0>
1 = Pin is configured as an input.
0 = Pin is configured as an output.
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MCP23017-E/ML 16 I/O, PIA-GENERAL PURPOSE, PQCC28
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