s29ns01gr Meet Spansion Inc., s29ns01gr Datasheet - Page 34

• Manufacturer Part Number: s29ns01gr
• Description: S29ns01gr 1gb 64 M X 16 Bit , 1.8 V Burst Simultaneous Read/write, Multiplexed Mirrorbit Flash Memory
• Manufacturer: Meet Spansion Inc.

7.5
7.6
34
Blank Check
Simultaneous Read/Write
Notes
1. BSB is used to check if a program or erase operation in progress in the current bank.
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.
The simultaneous read/write feature allows the host system to read data from one bank of memory while
programming or erasing another bank of memory. An erase operation may also be suspended to read from or
program another location within the same bank (note: programming to the sector being erased is not
allowed).
cycles may be initiated for simultaneous operation with zero latency. Refer to the
on page 48
Device Ready
Overall status
valid when Bit
valid when Bit
valid when Bit
valid when Bit
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 555h in Sector X. while the device is in the Idle
state (not during program suspend, not during erase suspend, ...).
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
Figure 10.14, Back-to-Back Read/Write Cycle Timings on page 58
table for read-while-program and read-while-erase current specification.
Erase Suspend
Status Bit
ESSB
Bit 6
X
X
X
X
D a t a
Erase Status
S29NS-R MirrorBit
Bit 5
ESB
Bit
X
X
X
X
S h e e t
Table 7.21 Status Register - Bit 0
Status Bit
Program
Bit 4
( A d v a n c e
PSB
X
X
X
X
®
Flash Family
Bit 3
RFU
RFU
X
X
X
X
I n f o r m a t i o n )
Status Bit
Suspend
Program
PSSB
Bit 2
X
X
X
X
shows how read and write
S29NS-R_00_03 May 9, 2008
DC Characteristics
Sector Lock
Status Bit
SLSB
Bit 1
X
X
X
X
Bank Status Bit
Erase op. in
Erase op. in
Program or
Program or
Program or
addressed
other Bank
No active
Erase op.
invalid
Bank
Bit 0
BSB
0
1
0
1