28F640W30 NUMONYX [Numonyx B.V], 28F640W30 Datasheet - Page 67

• Manufacturer Part Number: 28F640W30
• Description: Numonyx Wireless Flash Memory (W30)
• Manufacturer: NUMONYX [Numonyx B.V]

Numonyx™ Wireless Flash Memory (W30)
Figure 31: Erase Suspend / Resume Flowchart
12.2
November 2007
Order Number: 290702-13
Block Erase
The 2-cycle block erase command sequence, consisting of Erase Setup (20h) and Erase
Confirm (D0h), initiates one block erase at the addressed block. Only one partition can
be in an erase mode at a time; other partitions must be in a read mode. The Erase
Confirm command internally latches the address of the block to erase. Erase forces all
bits within the block to 1.
SR[7] is cleared while the erase executes.
After writing the Erase Confirm command, the selected partition is placed in read status
register mode. Reads performed to that partition return the current status data. The
address given during the Erase Confirm command does not need to be the same
Read Array
Data
Read
Erase Resumed
Same Partition
Same Partition
Any Address
Any Address
Read Status
Write B0h
Program?
Write D0h
Write 70h
Write 70h
Register
Read or
SR[7] =
SR[6] =
Done?
Start
1
1
No
Yes
Program
0
0
Program
Loop
ERASE SUSPEND / RESUME PROCEDURE
Erased Partition
Read Array
Completed
Write FFh
Erase
Data
Operation
Standby
Standby
Read or
Write
Write
Read
Write
Write
Write
Write
Bus
If the suspended partition was placed in
Read Array
or Program
Command
Read Array mode or a Program Loop:
Suspend
Resume
Status
Status
Erase
Erase
Read
Read
Data = B0h
Addr = Any address
Data = 70h
Addr = Any address in same partition
Read SRD
Toggle CE# or OE# to update SRD
Addr = Any address in same partition
Check SR[7]
1 = WSM ready
0 = WSM busy
Check SR[6]
1 = Erase suspended
0 = Erase completed
Data = FFh or 40h
Addr = Any device address (except
block being erased)
Read array or program data from/to
block other than the one being erased
Data = D0h
Addr = Any address
Return partition to status mode:
Data = 70h
Addr = Address within same partition
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Datasheet
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