JS28F512P30TFA datasheet(32/86 Pages) MICRON

32 / 86 page

P30-65nm

Datasheet

Apr 2010

Order Number: 208042-05

Note:

LK: Lock Setup Command, 60h; LK/D0h: Unlock Command; LK/01h: Lock Command; LK/2Fh: Lock-Down Command.

10.1.5

Block Locking During Suspend

Block lock and unlock changes can be performed during an erase suspend. To change

block locking during an erase operation, first issue the Erase Suspend command.

Monitor the Status Register until SR.7 and SR.6 are set, indicating the device is

suspended and ready to accept another command.

Next, write the desired lock command sequence to a block, which changes the lock

state of that block. After completing block lock or unlock operations, resume the erase

operation using the Erase Resume command.

Note:

A Lock Block Setup command followed by any command other than Lock Block, Unlock

Block, or Lock-Down Block produces a command sequence error and set Status

suspend, SR.4 and SR.5 remains set, even after the erase operation is resumed. Unless

the Status Register is cleared using the Clear Status Register command before

resuming the erase operation, possible erase errors may be masked by the command

sequence error.

If a block is locked or locked-down during an erase suspend of the same block, the lock

status bits change immediately. However, the erase operation completes when it is

resumed. Block lock operations cannot occur during a program suspend. See Appendix

A, “Write State Machine” on page 81, which shows valid commands during an erase

suspend.

Figure 9: Block Locking State Diagram

[0 0 0 ]

[0 0 1 ]

[0 1 1 ]

[1 1 1 ]

[1 0 1 ]

[1 1 0 ]

[1 0 0 ]

LK /

D0 h

LK /

01 h

LK /

2Fh

L K /2 F

LK /

D0 h

LK /

01 h o r 2 F h

LK /

D0 h

LK /

01 h

LK /

2F h

LK /

2F h

PG M /E R A S E

AL L O W E D

PG M /ER A SE

PR EV EN T ED

WP # = V

IL = 0

WP # = V

IH = 1

Po w e r -U p /

Re s e t De f a u lt

Po w e r - U p /

Re s e t De f a u lt

L o ck ed - d o w n

L o ck ed -d o w n

is d is a b le d b y

WP # = V

V ir t u a l lo c k -

do w n

A n y L o ck

co m m an d s

WP # t o g g le

P #

g g

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