Datasheet LTC4306 (Analog Devices) - 8

LTC4306
U OPERATIO Control Register Bit Definitions Register 0 (00h) Register 1 (01h) BIT NAME TYPE* DESCRIPTION BIT NAME TYPE* DESCRIPTION
d7 Downstream R Indicates if upstream bus is connected d7 Upstream R/W Activates upstream rise time Connected to any downstream buses Accelerators accelerator currents 0 = upstream bus disconnected from Enable 0 = upstream rise time accelerator all downstream buses currents inactive (default) 1 = upstream bus connected to one or 1 = upstream rise time accelerator more downstream buses currents active d6 ALERT1 Logic State R Logic state of ALERT1 pin, noninverting d6 Downstream R/W Activates downstream rise time d5 ALERT2 Logic State R Logic state of ALERT2 pin, noninverting Accelerators accelerator currents Enable 0 = downstream rise time accelerator d4 ALERT3 Logic State R Logic state of ALERT3 pin, noninverting currents inactive (default) d3 ALERT4 Logic State R Logic state of ALERT4 pin, noninverting 1 = downstream rise time accelerator d2 Failed Connection R Indicates if an attempt to connect to a currents active Attempt downstream bus failed because the d5 GPIO1 Output R/W GPIO1 output driver state, “Connection Requirement” bit in Driver State noninverting, default = 1 Register 2 was low and the d4 GPIO2 Output R/W GPIO2 output driver state, downstream bus was low Driver State noninverting, default = 1 0 = Failed connection attempt occurred 1 = No failed attempts at connection d3-d2 Reserved R Not Used occurred d1 GPIO1 Logic R Logic state of GPIO1 pin, d1 Latched Timeout R Latched bit indicating if a timeout has State noninverting occurred and has not yet been cleared. d0 GPIO2 Logic R Logic state of GPIO2 pin, 0 = no latched timeout State noninverting 1 = latched timeout * For Type, “R/W” = Read Write, “R” = Read Only d0 Timeout Real Time R Indicates real-time status of Stuck Low Timeout Circuitry 0 = no timeout is occurring 1 = timeout is occurring
Note: Masters write to Register 0 to reset the fault circuitry after a fault has occurred and been resolved. Because Register 0 is Read-Only, no other functionality is affected.
* For Type, “R/W” = Read Write, “R” = Read Only 4306f 8