Because of the hardware simplicity of the UART interface and the ease of writing software, this bridge device offers many advantages over other solutions: two wire host interface, long distance communication through RS-232, and no interrupt pin is need to interrupt the host – data is sent to the host automatically. The UART on the host side will interrupt the host if enabled. In addition, there are only a few commands that need to be learned and these commands can do everything a typical I2C controller is supposed to do, small 16 pin TSSOP package, eight extra GPIO pins available for use.