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 ...

The MCP23017, a 16-bit I2C GPIO expander, has always been a tasty chip ... This applies to the I2C version specifically — the SPI counterpart, MCP23S17, stays unaffected. Perhaps, using a ...