参数资料
型号: MCP23S09-E/P
厂商: Microchip Technology
文件页数: 6/50页
文件大小: 0K
描述: IC I/O EXPANDER SPI 8B 18DIP
标准包装: 25
接口: SPI
输入/输出数: 8
中断输出:
频率 - 时钟: 10MHz
电源电压: 1.8 V ~ 5.5 V
工作温度: -40°C ~ 125°C
安装类型: 通孔
封装/外壳: 18-DIP(0.300",7.62mm)
供应商设备封装: 18-PDIP
包装: 管件
产品目录页面: 684 (CN2011-ZH PDF)
MCP23009/MCP23S09
DS22121B-page 14
2009 Microchip Technology Inc.
1.5
GPIO Port
The GPIO module is a general purpose 8-bit wide
bidirectional port.
The outputs are open-drain.
The GPIO module contains the data ports (GPIOn),
internal pull up resistors and the Output Latches
(OLATn).
The pull up resistors are individually configured and
can be enabled when the pin is configured as an input
or output.
Reading the GPIOn register reads the value on the
port. Reading the OLATn register only reads the
latches, not the actual value on the port.
Writing to the GPIOn register actually causes a write to
the latches (OLATn). Writing to the OLATn register
forces the associated output drivers to drive to the level
in OLATn. Pins configured as inputs turn off the
associated output driver and put it in high-impedance.
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