SLUSDQ4 April 2019 BQ79606A-Q1
The FAULT* interface is used to inform the host of faulted conditions on stack devices. FAULT uses two tones to supply the host with the current FAULT status. A periodic heartbeat tone monitors communication bus integrity, while a FAULTDET tone actively signals a fault has occurred. The FAULT* interface is isolated in the same fashion as the daisy-chain interface. The FAULT* interface transmitters and receivers are individually enabled/disabled using the DAISY_CHAIN_CTRL[FAULTTX_EN] and DAISY_CHAIN_CTRL[FAULTRX_EN] bits, respectively.