Datasheet

LTC3880/LTC3880-1
95
3880fc
For more information www.linear.com/LTC3880
PMBus COMMAND DETAILS
STATUS_CML
The STATUS_CML commands returns one byte of status information on received commands, internal memory and logic.
STATUS_CML Message Contents:
BIT MEANING
7 Invalid or unsupported command received.
6 Invalid or unsupported data received.
5 Packet error check failed.
4 Memory fault detected.
3 Processor fault detected.
2 Reserved (LTC3880 returns 0).
1 Other communication fault.
0 Other memory or logic fault.
ALERT can be asserted if any supported bits are set. Any supported bit may be cleared by writing a 1 to that bit position in STATUS_CML, in lieu of a
CLEAR_FAULTS command.
This command has one data byte.
STATUS_MFR_SPECIFIC
The STATUS_MFR_SPECIFIC commands returns one byte with the manufacturer specific status information.
Each channel has a copy of the same information. Only bit 0 is page specific.
The format for this byte is:
BIT MEANING
7 Internal Temperature Fault Limit Exceeded.
6 Internal Temperature Warn Limit Exceeded.
5 NVM CRC Fault.
4 PLL is Unlocked
3 Fault Log Present
2 V
DD33
UV or OV Fault
0 GPIO Pin Asserted Low by External Device (paged)
If any of these bits are set, the MFR bit in the STATUS_WORD will be 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. Exception: The fault log present bit can only be cleared
by issuing the MFR_FAULT_LOG_CLEAR command.
Any supported fault bit in this command will initiate an ALERT event.
This command has one data byte.