參數資料
型號： S70WS512N00BFWAB2
廠商： Spansion Inc.
英文描述： Same-Die Stacked Multi-Chip Product (MCP) 512 Megabit (32M x 16 bit) CMOS 1.8 Volt-only Simultaneous Read/Write, Burst-mode Flash Memory
中文描述： 同硅晶片堆疊多芯片產品（MCP）的512兆位（32兆× 16位）的CMOS 1.8伏，只有同時讀/寫，突發(fā)模式閃存
文件頁數： 46/93頁
文件大小： 846K
代理商： S70WS512N00BFWAB2
March 14, 2005 S70WS512N00_00_A0
S70WS512N00 Based MCPs
47
A d v a n c e I n f o r m a t i o n
may choose to perform other system tasks. In this case, the system must start at the beginning
of the algorithm when it returns to determine the status of the operation. Refer to
Figure 8.6
for
more details.
DQ5: Exceeded Timing Limits.
DQ5 indicates whether the program or erase time has exceeded
a specified internal pulse count limit. Under these conditions DQ5 produces a
1
, indicating that
the program or erase cycle was not successfully completed. The device may output a
1
on DQ5 if
the system tries to program a
1
to a location that was previously programmed to
0
Only an erase
operation can change a
0
back to a
1.
Under this condition, the device halts the operation, and
when the timing limit has been exceeded, DQ5 produces a
1.
Under both these conditions, the
system must write the reset command to return to the read mode (or to the erase-suspend-read
mode if a bank was previously in the erase-suspend-program mode).
DQ3: Sector Erase Timeout State I ndicator.
After writing a sector erase command sequence,
the system may read DQ3 to determine whether or not erasure has begun. (The sector erase
timer does not apply to the chip erase command.) If additional sectors are selected for erasure,
the entire time-out also applies after each additional sector erase command. When the time-out
period is complete, DQ3 switches from a
0
to a
1.
If the time between additional sector erase
commands from the system can be assumed to be less than t
SEA
, the system need not monitor
DQ3. See Sector Erase Command Sequence for more details.
After the sector erase command is written, the system should read the status of DQ7 (Data# Poll-
ing) or DQ6 (Toggle Bit I) to ensure that the device has accepted the command sequence, and
then read DQ3. If DQ3 is
1
, the Embedded Erase algorithm has begun; all further commands (ex-
cept Erase Suspend) are ignored until the erase operation is complete. If DQ3 is
0
the device
accepts additional sector erase commands. To ensure the command has been accepted, the sys-
tem software should check the status of DQ3 prior to and following each sub-sequent sector erase
command. If DQ3 is high on the second status check, the last command might not have been
accepted.
Table 8.23
shows the status of DQ3 relative to the other status bits.
DQ1: W rite to Buffer Abort.
DQ1 indicates whether a Write to Buffer operation was aborted.
Under these conditions DQ1 produces a
1
. The system must issue the Write to Buffer Abort Reset
command sequence to return the device to reading array data. See Write Buffer Programming
Operation for more details.
Table 8.23 Write Operation Status
Notes:
1.
DQ5 switches to
1
when an Embedded Program or Embedded Erase operation has exceeded the maximum timing limits. Refer to the
section on DQ5 for more information.
DQ7 a valid address when reading status information. Refer to the appropriate subsection for further details.
Data are invalid for addresses in a Program Suspended sector.
DQ1 indicates the Write to Buffer ABORT status during Write Buffer Programming operations.
The data-bar polling algorithm should be used for Write Buffer Programming operations. Note that DQ7# during Write Buffer Programming
indicates the data-bar for DQ7 data for the
Last Loaded W rite-buffer Address location
.
2.
3.
4.
5.
Program
Suspend
Mode
(
Note 3
)
Reading within Program Suspended Sector
INVALID
(Not
Allowed)
INVALID
(Not
Allowed)
INVALID
(Not
Allowed)
INVALID
(Not
Allowed)
INVALID
(Not
Allowed)
INVALID
(Not
Allowed)
Reading within Non-Program Suspended
Sector
Data
Data
Data
Data
Data
Data
Write to
Buffer
(
Note 5
)
BUSY State
DQ7#
Toggle
0
N/A
N/A
0
Exceeded Timing Limits
DQ7#
Toggle
1
N/A
N/A
0
ABORT State
DQ7#
Toggle
0
N/A
N/A
1
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