Texas Instruments Incorporated
Methods and systems for using UART and single wire protocols

Abstract:

Methods and systems for data communication using the single wire communication protocol and the universal asynchronous receiver-transmitter (UART) communication protocol are disclosed. The method includes receiving by a first device a reset pulse. The method includes operating the first device in a standard speed single wire protocol if the width of the reset pulse is between 480 and 640 micro seconds. The method includes operating the first device in an overdrive speed single wire protocol if the width of the reset pulse is between 48 and 80 micro seconds. The method includes operating the first device in a universal asynchronous receiver-transmitter (UART) protocol if the width of the reset pulse is between 240 and 480 micro seconds. The method includes transmitting by the first device an answer responsive to the reset pulse. The method includes synchronizing the first device with a host device responsive to the reset pulse.