LTC2977 datasheet(61/138 Pages) AD

61 / 138 page

LTM4664A

Rev. 0

For more information www.analog.com

PMBus COMMAND SUMMARY

COMMAND NAME

CMD

CODE DESCRIPTION

TYPE

PAGED

DATA

FORMAT UNITS NVM

DEFAULT

VALUE

PAGE

MFR_IOUT_CAL_GAIN

0xDA The ratio of the voltage at the current

sense pins to the sensed current. For

devices using a fixed current sense

resistor. It is the resistance value in mohm.

OxAA8B set at factory

R Word

L11

0.350mΩ

102

MFR_PADS

0xE5 Digital status of the I/O pads.

R Word

Reg

124

MFR_ADDRESS

0xE6 Sets the 7-bit I2C address byte.

R/W Byte

Reg

0x4F

MFR_SPECIAL_ID

0xE7 Manufacturer code representing the

LTM4664A and revision

R Word

Reg

0x4100

118

MFR_IIN_CAL_GAIN

0xE8 The resistance value of the input current

sense element in mΩ.

R/W Word

L11

mΩ

2.0

0xC200

104

MFR_FAULT_LOG_ STORE

0xEA Command a transfer of the fault log from

RAM to EEPROM.

Send Byte

131

MFR_INFO

0xB6 Contact factory.

135

MFR_FAULT_LOG_ CLEAR

0xEC Initialize the EEPROM block reserved for

fault logging.

Send Byte

135

MFR_FAULT_LOG

0xEE Fault log data bytes.

R Block

Reg

131

MFR_COMMON

0xEF Manufacturer status bits that are common

across multiple LTC chips.

R Byte

Reg

125

MFR_COMPARE_USER_ ALL

0xF0 Compares current command contents

with NVM.

Send Byte

130

MFR_TEMPERATURE_2_ PEAK 0xF4 Peak internal die temperature since last

MFR_ CLEAR_PEAKS.

R Word

L11

129

MFR_PWM_CONFIG

0xF5 Set numerous parameters for the DC/DC

controller including phasing.

R/W Byte

Reg

0x10

MFR_IOUT_CAL_GAIN_ TC

0xF6 Temperature coefficient of the current

sensing element.

R/W Word

ppm/

˚C

3900

0x0F3C

102

MFR_RVIN

0xF7 The resistance value of the VIN pin filter

element in mΩ. Set at Factory

R Word

L11

mΩ

1000

0x03E8

MFR_TEMP_1_GAIN

0xF8 Sets the slope of the external temperature

sensor.

R/W Word

0.9

0x3FAE

105

MFR_TEMP_1_OFFSET

0xF9 Sets the offset of the external temperature

sensor with respect to –273.1°C

R/W Word

L11

0.0

0x8000

105

MFR_RAIL_ADDRESS

0xFA Common address for PolyPhase outputs

to adjust common parameters.

R/W Byte

Reg

0x80

MFR_REAL_TIME

0xFB 48-bit share-clock counter value.

R Block

MFR_RESET

0xFD Commanded reset without requiring a

power down.

Send Byte

Note 1. Commands indicated with Y in the NVM column 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 LTM4664A contains additional commands not listed in Table 7. 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 Table 7 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 strives to keep command functionality compatible between all LTC

devices. Differences may occur to address specific product requirements.

LTC2977 Datasheet(PDF) 61 Page - Analog Devices

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