TPS53676 supports a full set of PMBus status registers and the SMB_ALERT# notification protocol. All of the fault conditions listed in the table on the following pages have associated status bits. Status bits and SMB_ALERT# may be cleared using the CLEAR_FAULTS command, commanding the offending channel to disable (as specified in ON_OFF_CONFIG), or by power cycling. Most commonly, issue CLEAR_FAULTS with the PAGE set to FFh, to clear faults for both channels.

Figure 7-26 Status register support and decoding

TPS53676 supports a full set of PMBus status registers and the SMB_ALERT# notification protocol. Any condition which causes a status bit to assert, also causes TPS53676 to assert the SMB_ALERT# signal (unless that bit is masked via SMBALERT_MASK). Use the alert response address (ARA) protocol to determine the address of the device experiencing a fault condition in multi-slave systems. The SMB_ALERT# protocol is optional, and the system designer may choose to implement fault management through other means. The figure below shows a flow diagram of using the ARA protocol.

Figure 7-27 Flow diagram of SMB_ALERT# response protocol