LTM4686BEVPBF datasheet(120/130 Pages) AD

120 / 130 page

LTM4686B

120

Rev. 0

For more information www.analog.com

APPENDIX C: PMBUS COMMAND DETAILS

MFR_ADC_TELEMETRY_STATUS

The MFR_ADC_TELEMETRY_STATUS command provides the user the means to determine the most recent ADC

conversion when the MFR_ADC_CONTROL short round robin loop is enabled using command 0xD8 value 0x0D. The

bit assignments of this command are as follows:

BIT TELEMETRY DATA AVAILABLE

Reserved returns 0

Channel 1 IOUT readback (IOUT1)

Channel 1 VOUT readback (VOUT1)

Channel 0 IOUT readback (IOUT0)

Channel 0 VOUT readback (VOUT0)

Write to MFR_ADC_TELEMETRY_STATUS with data bits set to 1 clear the respective bits.

This read/write command has 1 data byte and is formatted in register format.

NVM (EEPROM) MEMORY COMMANDS

Store/Restore

COMMAND NAME

CMD

CODE

DESCRIPTION

TYPE

PAGED FORMAT UNITS NVM

DEFAULT

VALUE

STORE_USER_ALL

0x15

Store user operating memory to EEPROM.

Send Byte

RESTORE_USER_ALL

0x16

Restore user operating memory from EEPROM.

Identical to MFR_RESET.

Send Byte

MFR_COMPARE_USER_ALL

0xF0

Compares current command contents with NVM. Send Byte

STORE_USER_ALL

The STORE_USER_ALL command instructs the PMBus device to copy the nonvolatile user contents of the Operating

Memory to the matching locations in the nonvolatile User NVM memory (EEPROM).

The 10 year data retention can only be guaranteed when STORE_USER_ALL is executed at 0°C ≤ TJ ≤ 85°C. Executing

this command at junction temperatures above 85°C or below 0°C is not recommended because data retention cannot

be guaranteed for that condition. If the die temperature exceeds 130°C, the STORE_USER_ALL command is disabled.

The command is re-enabled when the IC temperature drops below 125°C.

Communication with the LTM4686B and programming of the EEPROM can be initiated when VDD33 is available and

SVIN is not applied. To enable the part in this state, using global address 0x5B write 0x2B followed by 0xC4. The part

can now be communicated with, and the project file updated. To write the updated project file to the EEPROM issue a

STORE_USER_ALL command. When SVIN is applied, a MFR_RESET or RESTORE_USER_ALL must be issued to allow

the PWM to be enabled and valid ADCs to be read.

This write-only command has no data bytes.

LTM4686BEVPBF 数据表(PDF) 120 Page - Analog Devices

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