NP8P128A13BSM60E Datasheet, PDF (76/92 Pages) Numonyx B.V – 128-Mbit Parallel Phase Change Memory

Numonyx® Omneo™ P8P Datasheet
Figure 33: Block Erase Flowchart
Start
Block Erase
Write 20h
Block Address
Erase Confirm
Write D0h and
Block Address
Read Status
Register
SR.7 =
0
1
Full Erase
Status Check
(if desired)
No
Suspend
Erase
BLOCK ERASE PROCEDURE
Bus
Operation
Command
Comments
Write
Block
Erase
Setup
Data = 20h
Addr = Block to be erased (BA)
Write
Erase Data = D0h
Confirm Addr = Block to be erased (BA)
Suspend
Erase
Loop
Yes
Read
Status register data. Toggle CE# or
OE# to update Status register data
Standby
Check SR.7
1 = WSM ready
0 = WSM busy
Repeat for subsequent block erasures.
Full Status register check can be done after each block erase
or after a sequence of block erasures.
Write FFh after the last operation to enter read array mode.
Block Erase
Complete
Read Status
Register
SR.3 =
1
0
SR.4,5 = ¹
0
SR.5 =
1
0
SR.1 =
1
0
Block Erase
Successful
FULL ERASE STATUS CHECK PROCEDURE
V_PP Range
Error
Command
Sequence Error
Block Erase
Error
Bus
Operation
Command
Comments
Standby
Check SR.3
1 = V_PP error
Standby
Check SR.4,5
Both 1 = Command sequence error
Standby
Standby
Check SR.5
1 = Block erase error
Check SR.1
1 = Attempted erase of locked block
Erase aborted
Erase of
Locked Block
Aborted
Only the Clear Staus Register command clears SR.1, 3, 4, 5.
If an error is detected, clear the Status register before
attempting an erase retry or other error recovery.
ERAS_BLK.WMF
Datasheet
76
July 2010
316144-07