LTC2977 datasheet(131/138 Pages) AD

131 / 138 page

LTM4664A

131

Rev. 0

For more information www.analog.com

PMBus COMMAND DETAILS

Fault Logging

COMMAND NAME

CMD CODE DESCRIPTION

TYPE

PAGED

DATA

FORMAT UNITS NVM

DEFAULT

VALUE

MFR_FAULT_LOG

0xEE

Fault log data bytes.

R Block

MFR_FAULT_LOG_ STORE

0xEA

Command a transfer of the fault log from RAM

to EEPROM.

Send Byte

MFR_FAULT_LOG_CLEAR

0xEC

Initialize the EEPROM block reserved for fault

logging.

Send Byte

MFR_FAULT_LOG

The MFR_FAULT_LOG command allows the user to read the contents of the FAULT_LOG after the first fault occurrence

since the last MFR_FAULT_LOG_CLEAR command was written. The contents of this command are stored in non-volatile

memory, and are cleared by the MFR_FAULT_LOG_CLEAR command. The length and content of this command are listed

in Table 15. If the user accesses the MFR_FAULT_LOG command and no fault log is present, the command will return

a data length of 0. If a fault log is present, the MFR_FAULT_LOG will return a block of data 147 bytes long. If a fault

occurs within the first second of applying power, some of the earlier pages in the fault log may not contain valid data.

NOTE: The approximate transfer time for this command is 3.4ms using a 400kHz clock.

This read-only command is in block format.

MFR_FAULT_LOG_STORE

The MFR_FAULT_LOG_STORE command forces the fault log operation to be written to NVM just as if a fault event

occurred. This command will set bit 3 of the STATUS_MFR_SPECIFIC fault if bit 7 “Enable Fault Logging” 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.

This write-only command has no data bytes.

LTC2977 Datasheet(PDF) 131 Page - Analog Devices

LTC2977 Datasheet(HTML) 131 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL