MYX29GL01GS11DPIV2 datasheet(15/68 Pages) MICROSS

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MYX29GL01GS11DPIV2

Revision 1.0 - 01/26/2015

*Advanced information. Subject to change without notice.

1Gb GL-S MirrorBit® Eclipse™

Flash Memory

MYX29GL01GS11DPIV2*

Form #: CSI-D-685 Document 001

3.4.4

Lock Register

TheLockRegisterholdsthenon-volatileOTPbitsforcontrollingprotectionoftheSSR,anddeterminingthe

PPBLockbitmanagementmethod(protectionmode).

Table 5: Lock Register

Bit

Default Value

Name

15-9

Reserved

SSR Region 1 (Customer) Lock Bit

Reserved

Password Protection Mode Lock Bit

Persistent Protection Mode Lock Bit

SSR Region 0 (Factory) Lock Bit

The Secure Silicon Region (SSR) protection bits must be used with caution, as once locked, there is no

procedure available for unlocking the protected portion of the Secure Silicon Region and none of the bits

intheprotectedSecureSiliconRegionmemoryspacecanbemodifiedinanyway.OncetheSecureSilicon

Regionareaisprotected,anyfurtherattemptstoprogramintheareawillfailwithstatusindicatingthearea

beingprogrammedisprotected.TheRegion0IndicatorBitislocatedintheLockRegisteratbitlocation0and

Region1inbitlocation6.

Asshippedfromthefactory,alldevicesdefaulttothePersistentProtectionmethod,withallsectorsunprotected,

when power is applied. The device programmer or host system can then choose which sector protection

methodtouse.Programmingeitherofthefollowingtwo,one-timeprogrammable,non-volatilebits,locksthe

partpermanentlyinthatmode:

• PersistentProtectionModeLockBit(DQ1)

• PasswordProtectionModeLockBit(DQ2)

Ifbothlockbitsareselectedtobeprogrammedatthesametime,theoperationwillabort.OncethePassword

ModeLockBitisprogrammed,thePersistentModeLockBitispermanentlydisabledandnochangestothe

protectionschemeareallowed.Similarly,ifthePersistentModeLockBitisprogrammed,thePasswordMode

ispermanentlydisabled.

MYX29GL01GS11DPIV2 Datasheet(PDF) 15 Page - Micross Components