SLUSBX9I March 2014 – July 2019 TPS23861
Command = 15h with 1 Data Byte, R/W
|RESET or POR VALUE||A||A||A||A||0||0||0||0|
FSE4-FSE1: Port power priority bits to support Fast Shutdown; one bit per port. It is used to specify which port or ports is/are shut down in response to an external assertion of the SHTDWN pin fast shutdown signal. The turn-off procedure is similar to a port reset using Reset command (Reset register). If one of these bits is set while the SHTDWN pin is low, that port is shut down as well.
1 = When the SHTDWN is forced to a low level, the corresponding port is powered off.
0 = SHTDWN signal has no impact on the port.
Reserved: Bits R15[3:0] are reserved for future use. Undesirable behavior may result if the value of these bits are changed from their reset value.