Abstract: A controller is provided that includes a serial data (SDA) line interface to connect the controller to an SDA line of a two-wire, shared, serial data bus. The controller includes processing circuitry to transfer output data on the SDA line, and monitor the SDA line of the data bus while the output data is transferred on the SDA line of the two-wire, shared, serial data bus. The controller detects a stop condition asserted by a target on the data bus while the output data is transferred on the SDA line of the two-wire, shared, serial data bus. The controller then ends transfer of the output data on the SDA line, in response to the detected stop condition.

Abstract: A controller is provided that includes a serial data (SDA) line interface to connect the controller to an SDA line of a two-wire, shared, serial data bus. The controller includes a circuitry to provide output data for transfer on to the SDA line via the output SDA pad buffer. The controller includes a logic circuit that is external to the circuitry, and that monitors data on the SDA line while the output data is transferred on to the SDA line. The logic circuit compares the monitored data on the SDA line and the output data to detect an error condition when the monitored data and the output data differ. The logic circuit disables an output SDA pad buffer of the SDA line interface for a current byte of the output data provided by the circuitry, and then causes a stop condition on the data bus.

Abstract: A method of causing a first battery to exit a battery storage mode is provided. The method may include receiving, while the first battery is in the battery storage mode, a wake up signal indicating a power up event, generating an exit signal in response to the wake up signal, to cause the first battery to supply power to a first processing circuitry, waiting a predetermined time period following a predetermined edge of the exit signal, determining, after expiration of the predetermined time period, whether the first battery is supplying power to the first processing circuitry, and generating a second exit signal in response to determining that the first battery is not supplying power to the first processing circuitry. In the battery storage mode, a second battery provides power to the second processing circuitry to perform the method of causing the first battery to exit the battery storage mode.

Abstract: A controller is provided that includes a serial data (SDA) line interface to connect the controller to an SDA line of a two-wire, shared, serial data bus. The controller includes processing circuitry to sample the SDA line to obtain samples of a voltage level on the SDA line, and monitor the samples. The processing circuitry detects a predetermined number of consecutive ones of the monitored samples at a low voltage level, without a low-to-high transition in the voltage level. The processing circuitry indicates a stuck SDA condition based on the detected, predetermined number of consecutive ones of the monitored samples.

Abstract: A target is provided that includes a serial data (SDA) line interface to connect the target to a SDA line of a two-wire, shared, serial data bus. The target includes processing circuitry to transfer output data on to the SDA line, and monitor data on the SDA line. The processing circuitry compares the data on the SDA line and the output data to detect an error condition when the data on the SDA line and the output data differ. And the processing circuitry performs at least one operation to recover from the detected error condition, including at least one of disabling an output SDA pad buffer of the target that transfers the output data on to the SDA line, or asserting a stop condition on the data bus.