Patent ID: 9300235
Filing Date: 2016-03-29
CPC Classification: H02P

Claim Text:
1. A motor driver comprising: a motor coil driver responsive to a motor command signal to control a motor; a feedback circuit to provide a feedback signal representing a status of the motor; a first terminal coupled to receive the motor command signal when the motor driver is controlling a motor; a second terminal coupled to transmit the feedback signal when the motor driver is controlling the motor; a motor control logic module that receives the motor command sign as an input from the first terminal, sends control signals to the motor coil driver to drive the motor in response to the command signal, receives the feedback signal from the feedback circuit, and generate a motor status signal representing the status of the motor as an output to the second terminal in response to the feedback signal; a serial data communication circuit configured to send and receive a serial data signal in accordance with a serial communication protocol over the first and second terminals when the motor is stopped or when a voltage on the first and/or second terminals is not pulled high or low; and a multiplexor coupled to the motor control logic module and the serial data communication circuit to selectively couple the second terminal feedback signal to the motor control logic module and the serial communication module in response to a determination that the motor is stopped or a voltage on the first and/or second terminals is not pulled high or low.