SLUSCC7C July 2016 – June 2018 TPS546C23
This bit enables auto-alert response address response. When this feature is enabled, and after the device has successfully responded to an ARA transaction, the hardware automatically masks any fault source currently set from reasserting SMBALERT. This prevents PMBus bus hogging in the case of a persistent fault in a device that consistently wins ARA arbitration because of the device address. In contrast, when this bit is cleared, immediate reassertion of SMBALERT is allowed in the event of a persistent fault and the responsibility is upon the host to mask each source individually.