LTM4686BEVPBF datasheet(126/130 Pages) AD

126 / 130 page

LTM4686B

126

Rev. 0

For more information www.analog.com

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

COMMAND NAME

CMD CODE DESCRIPTION

TYPE

PAGED

DATA

FORMAT UNITS NVM

DEFAULT

VALUE

MFR_EE_UNLOCK

0xBD

Unlock user EEPROM for access by MFR_EE_ERASE and

MFR_EE_DATA commands.

R/W Byte

Reg

MFR_EE_ERASE

0xBE

Initialize user EEPROM for bulk programming by

MFR_EE_DATA.

R/W Byte

Reg

MFR_EE_DATA

0xBF

Data transferred to and from EEPROM using sequential

PMBus word reads or writes. Supports bulk programming.

R/W

Word

Reg

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.

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