Datasheet LTM4675 (Analog Devices) - 126

LTM4675
APPENDIX C: PMBUS COMMAND DETAILS MFR_FAULT_LOG_STORE
The MFR_FAULT_LOG_STORE command forces the fault log operation to be written to EEPROM just as if a fault event occurred. This command will generate a MFR_SPECIFIC fault if the “Enable Fault Logging” bit is set in the MFR_ CONFIG_ALL command. If the die temperature exceeds 130°C, the MFR_FAULT_LOG_STORE command is disabled until the IC temperature drops below 125°C. Up-Time Counter is in the Fault Log header. The counter is the time since the last module reset (MFR_RESET, RESTORE_USER_ALL, or SVIN - power cycle) in 200µs increments. This is a 48-bit binary counter. This write-only command has no data bytes.
MFR_FAULT_LOG_CLEAR
The MFR_FAULT_LOG_CLEAR command will erase the fault log file stored values. It will also clear bit 3 in the STATUS_MFR_SPECIFIC command. After a clear is issued, the status can take up to 8ms to clear. This write-only command is send bytes.
Block Memory Write/Read DATA DEFAULT COMMAND NAME CMD CODE DESCRIPTION TYPE PAGED FORMAT UNITS NVM VALUE
MFR_EE_UNLOCK 0xBD Unlock user EEPROM for access by MFR_EE_ERASE and R/W Byte N Reg NA MFR_EE_DATA commands. MFR_EE_ERASE 0xBE Initialize user EEPROM for bulk programming by MFR_EE_ R/W Byte N Reg NA DATA. MFR_EE_DATA 0xBF Data transferred to and from EEPROM using sequential R/W N Reg NA PMBus word reads or writes. Supports bulk programming. Word All the (EEPROM) commands are disabled if the die temperature exceeds 130°C. (EEPROM) commands are re-enabled when the die temperature drops below 125°C.
MFR_EE_xxxx
MFR_EE_XXXX commands are used to facilitate bulk programming of the internal EEPROM. Contact the factory for more details. Rev. C 126 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Functional Diagram Test Circuits Operation Power Module Introduction Power Module Configurability and Readback Data Time-Averaged and Peak Readback Data Power Module Overview EEPROM Serial Interface Device Addressing Fault Detection and Handling Responses to VOUT and IOUT Faults Responses to Timing Faults Responses to SVIN OV Faults Responses to OT/UT Faults Responses to External Faults Fault Logging Bus Timeout Protection PMBus Command Summary PMBus Commands Applications Information VIN to VOUT Step-Down Ratios Input Capacitors Output Capacitors Light Load Current Operation Switching Frequency and Phase Minimum On-Time Considerations Variable Delay Time, Soft-Start and Output Voltage Ramping Digital Servo Mode Soft Off (Sequenced Off) Undervoltage Lockout Fault Detection and Handling Open-Drain Pins Phase-Locked Loop and Frequency Synchronization RCONFIG Pin-Straps (External Resistor Configuration Pins) Voltage Selection Connecting the USB to the I2C/SMBus/PMBus Controller to the LTM4675 In System LTpowerPlay: An Interactive GUI for Digital Power System Management PMBus Communication and Command Processing Thermal Considerations and Output Current Derating EMI Performance Safety Considerations Layout Checklist/Example Typical Applications Appendix A Similarity Between PMBus, SMBus and I2C 2-Wire Interface Appendix B PMBus Serial Digital Interface Appendix C: PMBus Command Details Addressing and Write Protect General Configuration Registers On/Off/Margin PWM Config Voltage Current Temperature Timing Fault Response Fault Sharing Scratchpad Identification Fault Warning and Status Telemetry NVM (EEPROM) Memory Commands Package Description Package Photograph Package Description Revision History Typical Application Design Resources Related Parts