LTC3882-1
102
Rev A
For more information
PMBus COMMAND DETAILS
(EEPROM User Access)
EEPROM USER ACCESS
COMMAND NAME
CMD
CODE DESCRIPTION
TYPE
PAGED
DATA
FORMAT UNITS NVM
DEFAULT
VALUE
STORE_USER_ALL
0x15 Store entire operating memory in EEPROM.
Send Byte
N
NA
RESTORE_USER_ALL
0x16 Restore entire operating memory from
EEPROM.
Send Byte
N
NA
MFR_COMPARE_USER_ALL
0xF0 Compare operating memory with EEPROM
contents.
Send Byte
N
MFR_FAULT_LOG_STORE
0xEA Force transfer of fault log from operating
memory to EEPROM.
Send Byte
N
MFR_EE_UNLOCK
0xBD (contact the factory)
MFR_EE_ERASE
0xBE (contact the factory)
MFR_EE_DATA
0xBF (contact the factory)
USER_DATA_00
0xB0 EEPROM word reserved for LTpowerPlay.
R/W Word
N
Reg
l
USER_DATA_01
0xB1 EEPROM word reserved for LTpowerPlay.
R/W Word
Y
Reg
l
USER_DATA_02
0xB2 EEPROM word reserved for OEM use.
R/W Word
N
Reg
l
USER_DATA_03
0xB3 EEPROM word available for general data
storage.
R/W Word
Y
Reg
l
0x0000
USER_DATA_04
0xB4 EEPROM word available for general data
storage.
R/W Word
N
Reg
l
0x0000
Related commands: MFR_CONFIG_ALL_LTC3882-1
Note that if the LTC3882-1 die temperature exceeds 130°C, execution of any command in the above table except RE-
STORE_USER_ALL and MFR_FAULT_LOG_STORE will be disabled until the IC temperature drops below 125°C. RE-
STORE_USER_ALL is executed immediately, and MFR_FAULT_LOG_STORE is executed after the IC temperature drops
below 125°C. Refer to Table 4 for details of fault log contents.
Using any command that writes data to the EEPROM is
strongly discouraged if bit 6 of STATUS_MFR_ SPECIFIC is set, indicating the internal die temperature is above 85°C.
Data retention of 10 years is not guaranteed if the EEPROM is written above a junction temperature of 85°C.
STORE_USER_ALL
The STORE_USER_ALL command instructs the PMBus device to copy the entire contents of the operating memory to
internal EEPROM PMBus configuration space.
This write-only command has no data bytes.
RESTORE_USER_ALL
The RESTORE_USER_ALL command instructs the PMBus device to copy the entire contents of the internal EEPROM
to matching locations in operating memory. The values in operating memory are overwritten by the values retrieved
from EEPROM. Both channels should be turned off prior to issuing this command. The LTC3882-1 ensures both PWM
channels are off, loads the operating memory from internal EEPROM, clears all faults, reads the resistor configuration
pins, and then performs a soft-start of both PWM channels, if enabled
This write-only command has no data bytes.
MFR_COMPARE_USER_ALL
The MFR_COMPARE_USER_ALL command instructs the LTC3882-1 to compare current operating memory (PMBus com-
mand values in RAM) with the contents of the internal EEPROM. If the compared memories differ, a CML fault is generated.
This write-only command has no data bytes.
