LTC2977 datasheet(123/138 Pages) AD

123 / 138 page

LTM4664A

123

Rev. 0

For more information www.analog.com

PMBus COMMAND DETAILS

STATUS_TEMPERATURE

The STATUS_TEMPERATURE commands returns one byte with status information on temperature. This is a paged

command and is related to the respective READ_TEMPERATURE_1 value.

STATUS_TEMPERATURE Message Contents:

BIT

MEANING

External overtemperature fault.

External overtemperature warning.

Not supported (LTM4664A returns 0).

External undertemperature fault.

3:0

Not supported (LTM4664A returns 0).

The user is permitted to write a 1 to any bit in this command to clear a specific fault. This permits the user to clear

status by means other than using the CLEAR_FAULTS command.

This command has one data byte.

STATUS_CML

The STATUS_CML command returns one byte of status information on received commands, internal memory and logic.

STATUS_CML Message Contents:

BIT

MEANING

Invalid or unsupported command received.

Invalid or unsupported data received.

Packet error check failed.

Memory fault detected.

Processor fault detected.

Reserved (LTM4664A returns 0).

Other communication fault.

Other memory or logic fault.

If either bit 3 or bit 4 of this command is set, a serious and significant internal error has been detected. Continued

operation of the part is not recommended if these bits are continuously set.

The user is permitted to write a 1 to any bit in this command to clear a specific fault. This permits the user to clear

status by means other than using the CLEAR_FAULTS command.

Any supported fault bit in this command will initiate an ALERT event.

This command has one data byte.

LTC2977 Datasheet(PDF) 123 Page - Analog Devices