Datasheet

LTC3883/LTC3883-1
35
3883fa
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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 LTC3883 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Note 4: Some of the unpublished commands are read-only and will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.
LT C 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
DATA
FORMAT UNITS NVM
DEFAULT
VALUE PAGE
MFR_FAULT_LOG_STORE 0xEA Command a transfer of the fault log from RAM to
EEPROM. This causes the part to behave as if a
channel has faulted off.
Send Byte NA
101
MFR_FAULT_LOG_CLEAR 0xEC Initialize the EEPROM block reserved for fault
logging and clear any previous fault logging
locks.
Send Byte NA
104
MFR_READ_IIN_CHAN 0xED Calculated input current based upon READ_IOUT
and DUTY_CYCLE.
R Word 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 Reg Y NA
101
MFR_COMMON 0xEF Manufacturer status bits that are common across
multiple LT C chips.
R Byte Reg NA
95
MFR_COMPARE_USER_
ALL
0xF0 Compares current command contents with NVM. Send Byte NA
100
MFR_TEMPERATURE_2_
PEAK
0xF4 Peak internal die temperature since last MFR_
CLEAR_PEAKS.
R Word L11 C NA
99
MFR_PWM_CONFIG_
LT C 3883
0xF5 Set numerous parameters for the DC/DC
controller including phasing.
R/W Byte Reg Y 0x10
69
MFR_IOUT_CAL_GAIN_TC 0xF6 Temperature coefficient of the current sensing
element.
R/W Word CF ppm/°C Y 3900
0x0F3C
74
MFR_RVIN 0xF7 The resistance value of the V
IN
pin filter element
in mΩ.
R/W Word L11 mΩ Y 3000
0x12EE
71
MFR_TEMP_1_GAIN 0xF8 Sets the slope of the external temperature
sensor.
R/W Word CF Y 1.0
0x4000
78
MFR_TEMP_1_OFFSET 0xF9 Sets the offset of the external temperature
sensor with respect to –273.1°C
R/W Word L11 C Y 0.0
0x8000
79
MFR_RAIL_ADDRESS 0xFA Common address for PolyPhase outputs to
adjust common parameters.
R/W Byte Reg Y 0x80
65
MFR_RESET 0xFD Commanded reset without requiring a power
down.
Send Byte NA
68