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PCA9655E

ON Semiconductor
Part Number PCA9655E
Manufacturer ON Semiconductor
Description Remote 16-bit I/O Expander
Published Sep 2, 2015
Detailed Description Remote 16-bit I/O Expander for I2C Bus with Interrupt PCA9655E The PCA9655E provides 16 bits of General Purpose parallel...
Datasheet PDF File PCA9655E PDF File

PCA9655E
PCA9655E

Overview
Remote 16-bit I/O Expander for I2C Bus with Interrupt PCA9655E The PCA9655E provides 16 bits of General Purpose parallel Input / Output (GPIO) expansion through the I2C−bus / SMBus.
The PCA9655E consists of two 8−bit Configuration (Input or Output selection); Input, Output and Polarity Inversion (active−HIGH or active−LOW operation) registers.
At power on, all I/Os default to inputs.
Each I/O may be configured as either input or output by writing to its corresponding I/O configuration bit.
The data for each Input or Output is kept in its corresponding Input or Output register.
The Polarity Inversion register may be used to invert the polarity of the read register.
All registers can be read by the system master.
The PCA9655E provides an open−drain interrupt output which is activated when any input state differs from its corresponding input port register state.
The interrupt output is used to indicate to the system master that an input state has changed.
The power−on reset sets the regis...


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