JS28F256P33BFE datasheet(77/90 Pages) MICRON

77 / 90 page

Datasheet

Aug 2009

Order Number:320003-08

P33-65nm

Figure 36: Block Lock Operations Flowchart

Start

Write 60h

Block Address

Write 90h

Read Block Lock

Status

Locking

Change?

Lock Change

Complete

Write 01,D0,2Fh

Block Address

Write FFh

Any Address

Yes

Write

(Optional)

Read

(Optional)

Standby

(Optional)

Write

Lock

Setup

Lock,

Unlock, or

Lockdown

Confirm

Read ID

Plane

Block Lock

Status

Read

Array

Data = 60h

Addr = Block to lock/unlock/lock-down (BA)

Data = 01h (Lock block)

D0h (Unlock block)

2Fh (Lockdown block)

Addr = Block to lock/unlock/lock-down (BA)

Data = 90h

Addr = Block address offset+2 (BA+2)

Block Lock status data

Addr = Block address offset+2 (BA+2)

Confirm locking change on DQ1, DQ0.

(See Block Locking State Transitions Table

for valid combinations.)

Data = FFh

Addr = Block address (BA)

Bus

Operation

Command

Comments

LOCKING OPERATIONS PROCEDURE

LOCK_OP.WMF

Lock

Confirm

Lock

Setup

Read ID Plane

Read

Array

JS28F256P33BFE Datasheet(PDF) 77 Page - Micron Technology

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