參數(shù)資料
型號： S29WS128N0LBFW010
廠商： SPANSION LLC
元件分類： PROM
英文描述： 256/128/64 MEGABIT CMOS 1.8 VOLT ONLY SIMULTANEOUS READ/WRITE BURST MODE FLASH MEMORY
中文描述： 8M X 16 FLASH 1.8V PROM, 70 ns, PBGA84
封裝： 11.60 X 8 MM, LEAD FREE, PLASTIC, FBGA-84
文件頁數(shù)： 41/95頁
文件大?。?/td> 1745K
代理商： S29WS128N0LBFW010
46
S29WSxxxN_00_F0 October 29, 2004
Pr e l i m i n a r y
After the sector erase command is written, the system should read the status of DQ7 (Data#
Polling) 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 com-
mands (except Erase Suspend) are ignored until the erase operation is complete. If DQ3 is
“0,” the device will accept additional sector erase commands. To ensure the command has
been accepted, the system 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 7.35 shows the status of DQ3 relative to the
other status bits.
DQ1: Write 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 Pro-
gramming Operation for more details.
Table 7.35. 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.
2. DQ7 and DQ2 require a valid address when reading status information. Refer to the appropriate subsection for further details.
3. Data are invalid for addresses in a Program Suspended sector.
4. DQ1 indicates the Write to Buffer ABORT status during Write Buffer Programming operations.
5. 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 WRITE-BUFFER ADDRESS location.
Status
DQ7
DQ6
DQ5
DQ3
DQ2
DQ1
Standard
Mode
Embedded Program Algorithm
DQ7#
Toggle
0
N/A
No toggle
0
Embedded Erase Algorithm
0
Toggle
0
1
Toggle
N/A
Program
Suspend
Mode
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
Erase
Suspend
Mode
Erase-Suspend-
Read
Erase
Suspended Sector
1
No toggle
0
N/A
Toggle
N/A
Non-Erase Suspended
Sector
Data
Erase-Suspend-Program
DQ7#
Toggle
0
N/A
Write to
Buffer
BUSY State
DQ7#
Toggle
0
N/A
0
Exceeded Timing Limits
DQ7#
Toggle
1
N/A
0
ABORT State
DQ7#
Toggle
0
N/A
1
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