SM34 Data Sheet #:

TM095

Page 18

Rev:

05 Date: 11/19/12

© Copyright 2012 The Connor-Winfield Corp. All Rights Reserved

Specifications subject to change without notice

FreeRun_Priority, 0x24 (R/W)

Bit 7 - Bit 5

Bit 4

Bit 3

Bit 2 - Bit 0

Enable/

Revertivity

Priority

Disable

1:Enable

000:Highest

Reserved

1:Enable

0:Disable

111:Lowest

0:Disable

Default:0

Default:0

Default:0

non-revertive

FreeRunmaybetreatedlikeareference.Whenitisenabled,FreeRunwillbeenteredwhenallreferencesofhigher

priorityarelostormasked.Iforwhenahigherpriorityreferencereturns,itisswitchedtoifFreeRunissetas“re-

vertive”.Whendisabled,FreeRunwillbeenteredonlyifmanuallyselectedorallreferencesfailwithoutanavailable

HoldOverhistory.

History_Policy, 0x25 (R/W)

Bit 7 - Bit 1

Bit 0

ReferenceSwitchHoldOver

HisoryPolicy

Reserved

0:Rebuild

1:Continue

Bit0determinesifHoldOverisretainedorrebuiltwhenareferenceswitchoccurs.SeeApplicationNotes,Holdover

HistoryAccumulationandManagementsection.

History_Cmd, 0x26 (R/W)

Bit 7 - Bit 1

Bit 0

HoldOverHistroyCommands

01:Saveactivehistorytobackuphistory

Reserved

10:Restoreactivehistoryfrombackup

11:Flushtheactivehistoryandaccumulationregister

00:Nocommand-usetowriteBit4tochangepolicy

Bits0-1arewrittentosaveaholdoverhistorytothebackuphistory,restoretheactiveholdoverhistoryfromthe

backup,orflushtheactivehistory.Thedefaultvalueoftheregisteris00.Aflushdoesnotaffectthebackuphistory.

SeeApplicationNotes,HoldoverHistoryAccumulationandManagementsection.Oncethecommandisexecuted,the

registeriscleared.Readsofthisregistermaynotreflectthelastcommandsent.

HoldOver_Time, 0x27 (R)

Bit 7 - Bit 0

IndicatesthetimesinceenteringtheHoldOverstate.from0-255,onebitperhour.Zeroinnon-HoldOverstateandstopsat255.

Cfgdata, 0x30 (R/W)

Bit 7 - Bit 0

Configurationdatawriteregister.

Configurationdataiswrittentothisregister.Internaluseonly.

Cfgctr_Lo, 0x31 (R)

Bit 7 - Bit 0

Configurationdatawritecounterlowbyte.

Loworderbyteofconfigurationdatawritecounter.Internaluseonly.

Register Descriptions and Operation continued