Please recommend a io expander device , spi interface, similar with TCA6416A. Thanks.
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Some of their output will exceed 100khz, they think SPI is faster than I2C.
Thanks for the feedback - that makes sense. Although TCA6416A supports I2C rates of 400 kHz, toggling an output port value would require multiple byte transfers and so a toggling a port at 100 kHz would not be possible.