Ken Van Hoeylandt
12 lines
519 B
Markdown
12 lines
519 B
Markdown
# TCA9535 / TCA9539 I/O expander
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A driver for the TI `TCA9535` and `TCA9539` 16-bit I2C-bus I/O expanders. Both parts
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share the same PCA9555-compatible register map (differing only in package and interrupt
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pin): two 8-bit ports for input, output, polarity inversion, and direction, addressed as
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pins 0-15 (port 0 = pins 0-7, port 1 = pins 8-15).
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It does not support pull-up/down resistors or high-impedance outputs; requesting those
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flags returns `ERROR_NOT_SUPPORTED`.
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License: [Apache v2.0](LICENSE-Apache-2.0.md)
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