LTC2978
PMBus COMMAND DESCRIPTION
8
ADC READINGS
CONTINUOUSLY
FILL BUFFER
TIME OF FAULT
TRANSFER TO
EEPROM AND
LOCK
.
.
.
.
.
.
RAM 255 BYTES
EEPROM 255 BYTES
AFTER FAULT
READ FROM
EEPROM AND
LOCK BUFFER
2978 F13
Figure 13. Fault Log Conceptual Diagram
MFR_FAULT_LOG_STORE
This command allows the user to transfer data from the RAM buffer to EEPROM.
MFR_FAULT_LOG_RESTORE
This command allows the user to transfer a copy of the fault-log data from the EEPROM to the RAM buffer. After a
restore the RAM buffer is locked until a successful Mfr_fault_log read.
MFR_FAULT_LOG_CLEAR
This command initializes the EEPROM block reserved for fault logging. Any previous fault log stored in EEPROM will
be erased by this operation.
MFR_FAULT_LOG_STATUS
Read only. This register is used to manage fault log events.
Mfr_fault_log_status_eepromissetafteraMFR_FAULT_LOG_STOREcommandorafaulted-offeventtriggersatransfer
of the fault log from RAM to EEPROM. This bit is cleared by a MFR_FAULT_LOG_CLEAR command.
Mfr_fault_log_status_ram is set after a MFR_FAULT_LOG_RESTORE to indicate that the data in the RAM has been
restored from EEPROM and not yet read using a MFR_FAULT_LOG command. This bit is cleared only by a successful
execution of an MFR_FAULT_LOG command.
MFR_FAULT_LOG_STATUS Data Contents
BIT(S) SYMBOL
OPERATION
b[1] Mfr_fault_log_status_ram
Fault log RAM status:
±: The fault log RAM allows updates.
1: The fault log RAM is locked until the next Mfr_fault_log read.
b[±] Mfr_fault_log_status_eeprom Fault log EEPROM status:
±: The transfer of the fault log RAM to the EEPROM is enabled.
1: The transfer of the fault log RAM to the EEPROM is inhibited.
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Linear Systems [ Linear Systems ]
