Datasheet

LTC3880/LTC3880-1
36
3880fc
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PMBus COMMAND SUMMARY
Note 1: Commands indicated with Y indicate that these commands are
stored and restored using the STORE_USER_ALL and RESTORE_USER_
ALL commands, respectively.
Note 2: Commands with a default value of NA indicate “not applicable”.
Commands with a default value of FS indicate “factory set on a per part
basis”.
Note 3: The LTC3880 contains additional commands not listed in this
table. Reading these commands is harmless to the operation of the IC;
however, the contents and meaning of these commands can change
without notice.
Note 4: Some of the unpublished commands are read-only and will
generate a CML bit 6 fault if written.
Note 5: Writing to commands not published in this table is not permitted.
Note 6: The user should not assume compatibility of commands
between different parts based upon command names. Always refer to
the manufacturer’s data sheet for each part for a complete definition of a
command’s function.
LTC has made every reasonable attempt to keep command functionality
compatible between parts; however, differences may occur to address
product requirements.
COMMAND NAME
CMD
CODE DESCRIPTION TYPE PAGED
DATA
FORMAT UNITS NVM
DEFAULT
VALUE PAGE
MFR_FAULT_LOG_CLEAR 0xEC Initialize the EEPROM block reserved for fault
logging and clear any previous fault logging
locks.
Send Byte N NA
107
MFR_READ_IIN 0xED Measured input current per channel R Word Y L11 A NA
99
MFR_FAULT_LOG 0xEE Fault log data bytes. This sequentially retrieved
data is used to assemble a complete fault log.
R Block N Reg Y NA
102
MFR_COMMON 0xEF Manufacturer status bits that are common across
multiple LTC chips.
R Byte N Reg NA
97
MFR_COMPARE_USER_
ALL
0xF0 Compares current command contents with NVM. Send Byte N NA
101
MFR_TEMPERATURE_2_
PEAK
0xF4 Peak internal die temperature since last MFR_
CLEAR_PEAKS.
R Word N L11 C NA
100
MFR_PWM_CONFIG_
LTC3880
0xF5 Set numerous parameters for the DC/DC
controller including phasing.
R/W Byte N Reg Y 0x10
68
MFR_IOUT_CAL_GAIN_TC 0xF6 Temperature coefficient of the current sensing
element.
R/W Word Y CF Y 3900
0x0F3C
74
MFR_TEMP_1_GAIN 0xF8 Sets the slope of the external temperature sensor. R/W Word Y CF Y 1.0
0x4000
76
MFR_TEMP_1_OFFSET 0xF9 Sets the offset of the external temperature
sensor with respect to –273.1°C
R/W Word Y L11 C Y 0.0
0x8000
76
MFR_RAIL_ADDRESS 0xFA Common address for PolyPhase outputs to
adjust common parameters.
R/W Byte Y Reg Y 0x80
64
MFR_RESET 0xFD Commanded reset without requiring a power
down.
Send Byte N NA
67