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The PCF8574 IO Expansion Board is used as remote 8-bit I/O expander for
I2C-bus. Up to 8 PCF8574 IO Expansion Board can be connected to the
I2C-bus, providing up to 64 I/O ports.
The PCF8574 IO Expansion
Board features I2C pinheader on one side, and I2C connector on the
opposite side. Hence, it's more flexible to connect the board to your
development system. The board also supports I2C cascading, allowing the
use of multi module connected to the I2C bus at the same time by
connecting the pinheader and connector.
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