111
Rev. B
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
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 (LTM4680 returns 0).
1
Other communication fault.
0
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.
STATUS_MFR_SPECIFIC
The STATUS_MFR_SPECIFIC commands returns one byte with the manufacturer specific status information.
The format for this byte is:
BIT MEANING
7
Internal Temperature Fault Limit Exceeded.
6
Internal Temperature Warn Limit Exceeded.
5
Factory Trim Area NVM CRC Fault.
4
PLL is Unlocked
3
Fault Log Present
2
V
DD33
UV or OV Fault
1
ShortCycle Event Detected
0
FAULT
Pin Asserted Low by External Device
If any of these bits are set, the MFR bit in the STATUS_WORD will be set, and
ALERT
may be asserted.
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. However, 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.
PMBus COMMAND DETAILS
