Analog Devices Linear LTM 4700 User Manual page 110

LTM4700
PMBus COMMAND DETAILS
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 UV or OV Fault
DD33
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.
MFR_PADS
This command provides the user a means of directly reading the digital status of the I/O pins of the device. The bit
assignments of this command are as follows:
BIT ASSIGNED DIGITAL PIN
15 V OV Fault
DD33
14 V UV Fault
DD33
13 Reserved
12 Reserved
11 ADC Values Invalid, Occurs During Start-Up. May Occur Briefly on Current Measurement Channels During Normal Operation
10 SYNC clocked by external device (when LTM4700 configured to drive SYNC pin)
9 Channel 1 Power Good
8 Channel 0 Power Good
7 LTM4700 Driving RUN1 Low
6 LTM4700 Driving RUN0 Low
5 RUN1 Pin State
4 RUN0 Pin State
3 LTM4700 Driving FAULT1 Low
2 LTM4700 Driving FAULT0 Low
1 FAULT1 Pin State
0 FAULT0 Pin State
A 1 indicates the condition is true.
This read-only command has two data bytes.
110
For more information www.analog.com
Rev. B