MYX29GL01GS11DPIV2 datasheet(13/68 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

Figure 2: Advanced Sector Protection Overview

October 9, 2013 S29GL_128S_01GS_00_08

GL-S MirrorBit® Family

Data She e t

3.4

Sector Protection Methods

3.4.1

Write Protect Signal

If WP# = VIL, the lowest or highest address sector is protected from program or erase operations independent

of any other ASP configuration. Whether it is the lowest or highest sector depends on the device ordering

option (model) selected. If WP# = VIH, the lowest or highest address sector is not protected by the WP# signal

but it may be protected by other aspects of ASP configuration. WP# has an internal pull-up; when

unconnected, WP# is at VIH.

3.4.2

ASP

Advanced Sector Protection (ASP) is a set of independent hardware and software methods used to disable or

enable programming or erase operations, individually, in any or all sectors. This section describes the various

methods of protecting data stored in the memory array. An overview of these methods is shown in Figure 3.1.

Figure 3.1 Advanced Sector Protection Overview

Every main flash array sector has a non-volatile (PPB) and a volatile (DYB) protection bit associated with it.

When either bit is 0, the sector is protected from program and erase operations.

The PPB bits are protected from program and erase when the PPB Lock bit is 0. There are two methods for

managing the state of the PPB Lock bit, Persistent Protection and Password Protection.

The Persistent Protection method sets the PPB Lock to 1 during POR or Hardware Reset so that the PPB bits

are unprotected by a device reset. There is a command to clear the PPB Lock bit to 0 to protect the PPB bits.

Password Method

(DQ2)

Persistent Method

(DQ1)

Lock Register

(One Time Programmable)

PPB Lock Bit1,2,3

64-bit Password

(One Time Protect)

1 = PPBs Unlocked

0 = PPBs Locked

Memory Array

Sector 0

Sector 1

Sector 2

Sector N-2

Sector N-1

Sector N4

PPB 0

PPB 1

PPB 2

PPB N-2

PPB N-1

PPB N

Persistent

Protection Bit

(PPB)5,6

DYB 0

DYB 1

DYB 2

DYB N-2

DYB N-1

DYB N

Dynamic

Protection Bit

(DYB)7,8,9

7. 0 = Sector Protected,

1 = Sector Unprotected.

8. Protect effective only if corresponding PPB

is “1” (unprotected).

9. Volatile Bits: defaults to user choice upon

power-up (see ordering options).

5. 0 = Sector Protected,

1 = Sector Unprotected.

6. PPBs programmed individually,

but cleared collectively

1. Bit is volatile, and defaults to “1” on reset (to

“0” if in Password Mode).

2. Programming to “0” locks all PPBs to their

current state.

3. Once programmed to “0”, requires hardware

reset to unlock or application of the

password.

4. N = Highest Address Sector.

Everymainflasharraysectorhasanon-volatile(PPB)andavolatile(DYB)protectionbitassociatedwithit.

Wheneitherbitis0,thesectorisprotectedfromprogramanderaseoperations.

hePPBbitsareprotectedfromprogramanderasewhenthePPBLockbitis0.Therearetwomethodsfor

managingthestateofthePPBLockbit,PersistentProtectionandPasswordProtection.

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