参数资料
型号: MCP23009-E/MG
厂商: Microchip Technology
文件页数: 8/50页
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 16QFN
标准包装: 120
接口: I²C
输入/输出数: 8
中断输出:
频率 - 时钟: 3.4MHz
电源电压: 1.8 V ~ 5.5 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 16-VFQFN 裸露焊盘
供应商设备封装: 16-QFN-EP(3x3)
包装: 管件
产品目录页面: 684 (CN2011-ZH PDF)
MCP23009/MCP23S09
DS22121B-page 16
2009 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
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: Controls 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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