s29ns01gs Meet Spansion Inc., s29ns01gs Datasheet - Page 33

• 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.

April 20, 2009 S29NS-S_00_02
Any word location within the user area, shown as A=half in
system byte address bit a4=0) may be programmed (bits may be cleared to Zero). Any word location in the
reserved area, shown as B-half in
programmed to Zero. Any attempt to program a Zero to a One, of a bit that is already a Zero will be ignored
and the bit will remain a Zero.
In addition, any attempt to clear to Zero of bits within the reserved area will not be done and will cause a
program failure to be indicated in the status register. Bit-Field programming of the lower 16 bytes in a CL may
be repeated up to 128 times, allowing the lower 16 bytes in a CL to be programmed even a single bit at a
time. When any portion of a CL is programmed by the Bit-Field programming command, all CL within the
same 512-byte aligned, 512-byte group (page), containing the CL selected by the programming command,
will be treated as being programmed by the Bit-Field programming command. This means all CL in the 512
Byte group will have the same format of user and reserved portions. Bit-Field programming is thus a finer
resolution but lower density programming method as one half of the bytes within a 512 Byte group are
available for programming and one half are reserved. The address mapping between the user and reserved
locations is shown in
Cache Line (CL)
Cache Line
31
D a t a
31
1
0
1
0
Updatable Information
Updatable Info.
Table
S h e e t
Figure 7.3 Programming Groups: Bit Program and Page Mode
Data
S29NS-S MirrorBit
Data
7.14.
Program up to 256
Bytes of data
Program up to
512 bytes of data
Updatable Information
( P r e l i m i n a r y )
Figure 7.3
16 Bytes
Updatable Information
®
Updatable Information
Eclipse
Data
(Flash address A3=1 system address a4=1) must not have bits
Programming
256 Bytes
(Bit-Field
A half
Mode)
™
Flash Family
512 byte
512 byte
32 Bytes
.
.
.
Figure 7.3
Data
256 Bytes
(Reserved)
B half
.
.
.
.
(Flash word address bit A3=0 or
128-Kbyte Sector
Data
Programming
region in
Page Mode
Bit-Field Programming
RESERVED
RESERVED
Programming
RESERVED
region in
16 Bytes
Data
Mode
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