In this code example, PIC16F15276 MCU acts as client and used as an I/O expander by host, and communicates through SPI interface. Refer code example SPI I/O Expander: Host Implementation using ...

IO expander handle, set to NULL if not used */ uint32_t scl_half ... void *user_ctx); static esp_err_t set_line_level(esp_lcd_panel_io_3wire_spi_t *panel_io, spi_line_t line, uint32_t level); static ...

Depending on configuration it can turn USB into UART, JTAG, SPI, I2C, and GPIO. Want to prototype the driver for a new sensor? Why bother flashing your Teensy when you can drive it directly from ...

This is far from the only IO expander IC. Have you used another chip? Don’t forget to catch up on any parts posts you may have missed.

Since I/O expander is using the SPI interface. What do you mean by "risks"? If everything is wired properly and your software is working fine, I don't see any problems using a SPI based expander for ...

In the default setting of IO-EXPANDER-EVM, TCA6408A is not in it. If I evaluate TCA6408A in IO-EXPANDER-EVM, I need to replace the device to TCA6408APWR, is my understanding correct? Yes, that is the ...