参数资料
型号: MCP23009-E/SS
厂商: Microchip Technology
文件页数: 9/50页
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 20SSOP
标准包装: 67
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: 20-SSOP(0.209",5.30mm 宽)
供应商设备封装: 20-SSOP
包装: 管件
产品目录页面: 684 (CN2011-ZH PDF)
2009 Microchip Technology Inc.
DS22121B-page 17
MCP23009/MCP23S09
1.6.2
INPUT POLARITY REGISTER
This register allows the user to configure the polarity on
the corresponding GPIO port bits.
If a bit is set, the corresponding GPIO register bit will
reflect the inverted value on the pin.
REGISTER 1-2:
IPOL – INPUT POLARITY PORT REGISTER
R/W-0
IP7
IP6
IP5
IP4
IP3
IP2
IP1
IP0
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
IP7:IP0: Controls the polarity inversion of the input pins <7:0>
1
= GPIO register bit will reflect the opposite logic state of the input pin
0
= GPIO register bit will reflect the same logic state of the input pin
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