TI’s MSP430 chips are rather interesting – they’re low power, very capable, and available for under a dollar in most cases. Some of these chips, though, don’t have native SPI or I2C interfaces; ...
The microchip PIC microcontroller incorporates an I2C interface on one side using bit-banging on a 12F675 device and an RS232 serial interface on the other. The RS232 in this device refers to ...