s29ns01gs Meet Spansion Inc., s29ns01gs Datasheet - Page 29

• Manufacturer Part Number: s29ns01gs
• Description: S29ns01gs 1024 Megabit 128 Megabyte 16-bit Data Width, Burst Access, Simultaneous Read/write, 1.8 Volt-only Flash Memory In 65 Nm Mirrorbit Technology
• Manufacturer: Meet Spansion Inc.

7.5
7.6
April 20, 2009 S29NS-S_00_02
Simultaneous Read/Write
Blank Check
Notes
1. BSB is used to check if a program or erase operation is in progress in the current bank.
The simultaneous read/write (SRW) feature allows the host system to read data from one bank of memory
while an Embedded Algorithm (EA) such as programming or erasing is operating in another bank of memory.
Sometimes this feature is also referred to as Read While Write (RWW).
and Write Combinations on page 62
EA, for simultaneous operation, with zero latency between the read and write accesses. Refer to the
Characteristics on page 55
The Blank Check command will confirm if the selected sector is erased.
The Blank Check command does not allow for reads to the array during the Blank Check. Reads to the array
while this command is executing will return unknown data.
Device Ready
valid when Bit
valid when Bit
valid when Bit
valid when Bit
Overall status
Bits 6:1 only
Bits 6:1 only
Bit 6:1 only
Bit 6:1 only
To initiate a Blank Check on Sector X, write 33h to address CAP1 in Sector X when no other EA is active or
suspended.
The Blank Check command may not be written while the device is actively programming or erasing. Blank
Check does not support simultaneous operations.
Use the Status Register read to confirm if the device is still busy and when compete if the sector is blank or
not.
Bit 5 of the Status Register will be cleared to zero if the sector is erased and set to one if not erased.
Bit 7 & Bit 0 of the Status Register will show if the device is performing a Blank Check (similar to an erase
operation).
As soon as any bit is found to not be erased, the device will halt the operation and report the results.
Once the Blank Check is completed, the device will to return to the Idle State.
7 = 1
7 = 1
7 = 1
7 = 1
Bit 7
DRB
Bit
0
0
1
1
D a t a
Erase Suspend
Status Bit
ESSB
Bit 6
X
X
X
X
S h e e t
S29NS-S MirrorBit
table for the read-while-write current specification.
Erase Status
Bit 5
ESB
Bit
X
X
X
X
( P r e l i m i n a r y )
shows how read and write cycles may be alternated in order to initiate an
Table 7.13 Status Register - Bit 0
®
Status Bit
Eclipse
Program
Bit 4
PSB
X
X
X
X
™
Flash Family
Bit 3
RFU
RFU
X
X
X
X
Status Bit
Suspend
Program
Section 10.7.4, Back to Back Read
PSSB
Bit 2
X
X
X
X
Sector Lock
Status Bit
SLSB
Bit 1
X
X
X
X
Bank Status Bit
No Program or
Erase op. in
Erase op. in
Program or
Program or
addressed
addressed
Erase op.
No active
invalid
Bank
Bank
Bit 0
BSB
DC
0
1
0
1
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