MYX29GL01GS11DPIV2 datasheet(16/68 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

Ifthepasswordmodeistobechosen,thepasswordmustbeprogrammedpriortosettingthecorresponding

lockregisterbit.SettingthePasswordProtectionModeLockBitisprogrammed,apowercycle,hardware

reset,orPPBLockBitSetcommandisrequiredtosetthePPBLockbitto0toprotectthePPBarray.

The programming time of the Lock Register is the same as the typical word programming time. During a

LockRegisterprogrammingEA,DatapollingStatusDQ6ToggleBitIwilltoggleuntiltheprogramminghas

completed.ThesystemcanalsodeterminethestatusofthelockregisterprogrammingbyreadingtheStatus

TheuserisnotrequiredtoprogramDQ2orDQ1,andDQ6orDQ0bitsatthesametime.Thisallowstheuser

tolocktheSSRbeforeorafterchoosingthedeviceprotectionscheme.WhenprogrammingtheLockBits,the

ReservedBitsmustbe1(masked).

3.4.5

Persistent Protection Mode

ThePersistentProtectionmethodsetsthePPBLockto1duringPORorHardwareResetsothatthePPBbits

areunprotectedbyadevicereset.ThereisacommandtoclearthePPBLockbitto0toprotectthePPB.There

isnocommandinthePersistentProtectionmethodtosetthePPBLockbitto1thereforethePPBLockbitwill

remainat0untilthenextpower-offorhardwarereset.

3.4.6

Password Protection Mode

3.4.6.1

PPB Password Protection Mode

PPBPasswordProtectionModeallowsanevenhigherlevelofsecuritythanthePersistentSectorProtection

Mode,byrequiringa64-bitpasswordforsettingthePPBLock.Inadditiontothispasswordrequirement,after

powerupandreset,thePPBLockisclearedto0toensureprotectionatpower-up.Successfulexecutionof

thePasswordUnlockcommandbyenteringtheentirepasswordsetsthePPBLockto1,allowingforsector

PPBmodifications.

PasswordProtectionNotes:

• ThePasswordProgramCommandisonlycapableofprogramming0’s.

• Thepasswordisall1’swhenshippedfromtheOEM.Itislocatedinitsownmemoryspaceandis

accessiblethroughtheuseofthePasswordProgramandPasswordReadcommands.

• All64-bitpasswordcombinationsarevalidasapassword.

• OncethePasswordisprogrammedandverified,thePasswordModeLockingBitmustbesetinorder

topreventreadingormodificationofthepassword.

• ThePasswordModeLockBit,onceprogrammed,preventsreadingthe64-bitpasswordonthedata

busandfurtherpasswordprogramming.Allfurtherprogramandreadcommandstothepasswordregion

aredisabled(dataisreadas1’s)andthesecommandsareignored.Thereisnomeanstoverifywhatthe

MYX29GL01GS11DPIV2 Datasheet(PDF) 16 Page - Micross Components