MYX29GL01GS11DPIV2 datasheet(17/68 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

passwordisafterthePasswordProtectionModeLockBitisprogrammed.Passwordverificationisonly

allowedbeforeselectingthePasswordProtectionmode.

• ThePasswordModeLockBitisnoterasable.

• Theexactpasswordmustbeenteredinorderfortheunlockingfunctiontooccur.

• Theaddressescanbeloadedinanyorderbutall4wordsarerequiredforasuccessfulmatchtooccur.

• TheSectorAddressesandWordLineAddressesarecomparedwhilethepasswordaddress/dataare

loaded.IftheSectorAdddressdon’tmatchthantheerrorwillbereportedattheendofthatwritecycle.

ThestatusregisterwillreturntothereadystatewiththeProgramStatusBitsetto1,ProgramStatus

RegisterBitsetto1,andWriteBufferAbortStatusBitsetto1indicatingafailedprogrammingoperation.

ItisafailuretochangethestateofthePPBLockbitbecauseitisstillprotectedbythelackofavalid

password.Thedatapollingstatuswillremainactive,withDQ7settothecomplementoftheDQ7bitin

thelastwordofthepasswordunlockcommand,andDQ6toggling.RY/BY#willremainlow.

• ThespecificaddressanddataarecomparedaftertheProgramBufferToFlashcommandhasbeen

given.Iftheydon’tmatchtotheinternalsetvaluethanthestatusregisterwillreturntotheready

statewiththeProgramStatusBitsetto1andProgramStatusRegisterBitsetto1indicatinga

failedprogrammingoperation.ItisafailuretochangethestateofthePPBLockbitbecauseitisstill

protectedbythelackofavalidpassword.Thedatapollingstatuswillremainactive,withDQ7setto

thecomplementoftheDQ7bitinthelastwordofthepasswordunlockcommand,andDQ6toggling.

RY/BY#willremainlow.

• Thedevicerequiresapproximately100μsforsettingthePPBLockafterthevalid64-bitpasswordis

giventothedevice.

• ThePasswordUnlockcommandcannotbeacceptedanyfasterthanonceevery100μs±20μs.This

makesittakeanunreasonablylongtime(58millionyears)forahackertorunthroughallthe64-bit

combinationsinanattempttocorrectlymatchapassword.TheEAstatuscheckingmethodsmaybe

usedtodeterminewhentheEACisreadytoacceptanewpasswordcommand.

• IfthepasswordislostaftersettingthePasswordModeLockBit,thereisnowaytoclearthe

PPBLock.

Read Operations

4 .1

Asynchronous Read

Each read access may be made to any location in the memory (random access). Each random access is

selftimedwiththesamelatencyfromCE#oraddresstovaliddata(tACCortCE).

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