Datasheet

MAX34451 PMBus 16-Channel V/I Monitor and
12-Channel Sequencer/Marginer
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Table 28. MFR_NV_LOG_CONFIG (D8h)
*The device clears two fault logs at a time when overwrite is enabled.
BIT NAME MEANING
15 FORCE_NV_FAULT_LOG
Settingthisbittoa1,forcesthedevicetologdataintothenonvolatilefaultlog.Once
set, the device clears this bit when the action is completed. Host must set again for
subsequentaction.Ifanerroroccursduringthisaction,thedevicesetstheCMLbitin
STATUS_WORD;nobitsaresetinSTATUS_CML.
14 CLEAR_NV_FAULT_LOG
Settingthisbittoa1,forcesthedevicetoclearthenonvolatilefaultlogbywritingFFhto
all byte locations. Once set, the device clears this bit when the action is completed. Host
must set again for subsequent action. If an error occurs during this action, the device
setstheCMLbitinSTATUS_WORD;nobitsaresetinSTATUS_CML.Whileclearingthe
faultlog,monitoringisstoppedandcommandsshouldnotbesenttothePMBusport.
13:11 0 Thesebitsalwaysreturna0.
10 NV_LOG_T0_CONFIG
ThisbitdeterminesthesourceofthedatawrittenintotheT0locationofeachpagewhen
a nonvolatile fault log is written.
0=LogthelastregularcollectionintervalADCreading
1=ReadthelatestADCvaluebeforelogging
9 NV_LOG_OVERWRITE
0=DonotoverwritetheNVfaultlog
1=OverwritetheNVfaultlogonceitisfull*
8:7 NV_LOG_DEPTH[1:0]
ThesebitsdeterminethedepthoftheNVfaultlog:
NV_LOG_DEPTH[1:0]
00
01
10
11
ADCRESULTCOLLECTION
INTERVAL
5ms
20ms
80ms
160ms
NVFAULTLOGDEPTH
15ms
60ms
240ms
480ms
N NV_LOG_FAULT0
0=DonotwriteNVfaultlogwhenFAULT0 pin is externally pulled low.
1=WriteNVfaultlogwhenFAULT0 pin is externally pulled low.
5 NV_LOG_FAULT1
0=DonotwriteNVfaultlogwhenFAULT1 pin is externally pulled low.
1=WriteNVfaultlogwhenFAULT1 pin is externally pulled low and the FAULT1 pin is
enabled.
4 NV_LOG_FAULT2
0=DonotwriteNVfaultlogwhenFAULT2 pin is externally pulled low.
1=WriteNVfaultlogwhenFAULT2 pin is externally pulled low and the FAULT2 pin is
enabled.
3:0 0
Thesebitsalwaysreturna0.