306666-11 Datasheet, PDF (85/99 Pages) Numonyx B.V – Numonyx StrataFlash Embedded Memory

P30
Figure 44: Block Lock Operations Flowchart
Start
Lock Setup
Write 60 h
Block Address
Lock Confirm
Write 01 ,D0,2Fh
Block Address
Read ID Plane
Write 90 h
Read Block Lock
Status
Locking No
Change ?
Yes
Read Array
Write FFh
Any Address
Lock Change
Complete
LOCKING OPERATIONS PROCEDURE
Bus
Command
Operation
Comments
Write
Lock Data = 60h
Setup Addr = Block to lock/unlock/lock-down (BA)
Write
Lock, Data = 01h (Lock block)
Unlock, or
D0h (Unlock block)
Lockdown
2Fh (Lockdown block)
Confirm Addr = Block to lock/unlock/lock-down (BA)
Write Read ID Data = 90h
( Optional) Plane Addr = Block address offset+2 ( BA+2 )
Read Block Lock Block Lock status data
( Optional) Status Addr = Block address offset+2 ( BA+2 )
Standby
( Optional)
Confirm locking change on DQ1, DQ0.
(See Block Locking State Transitions Table
for valid combinations.)
Write
Read Data = FFh
Array Addr = Block address (BA)
LOCK_OP.WMF
November 2007
Order Number: 306666-11
Datasheet
85