S70GL01GN00 Datasheet, PDF (67/83 Pages) SPANSION – 3.0 Volt-only Page Mode Flash Memory featuring 110 nm MirrorBit™ Process Technology

Advance Information
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 50 µs, the system need not monitor DQ3. See also Sector Erase Command
Sequence‚ on page 47.
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 accepted the
command sequence, and then read DQ3. If DQ3 is 1, the Embedded Erase algo-
rithm started; all further commands (except 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 is accepted, the system software
should check the status of DQ3 prior to and following each subsequent sector
erase command. If DQ3 is high on the second status check, the last command
might not have been accepted.
Table 12 on page 65 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‚ on page 11 for more details.
Table 12. Write Operation Status
Status
DQ7
(Note 2)
DQ6
DQ5
DQ2
RY/
(Note 1) DQ3 (Note 2) DQ1 BY#
Standard
Mode
Embedded Program Algorithm
Embedded Erase Algorithm
DQ7#
0
Toggle
Toggle
0
N/A
No toggle
0
0
0
1
Toggle
N/A
0
Program
Suspend
Mode
Program-
Suspend
Read
Program-Suspended
Sector
Non-Program
Suspended Sector
Invalid (not allowed)
1
Data
1
Erase- ^{Erase-Suspended Sector}
1
No toggle
0
N/A
Toggle
N/A
1
Erase
Suspend
Suspend _{Non-Erase Suspended}
Read
Sector
Data
1
Mode
Erase-Suspend-Program
(Embedded Program)
DQ7#
Toggle
0
N/A
N/A
N/A
0
Write-to-
Buffer
Busy (Note 3)
Abort (Note 4)
DQ7#
DQ7#
Toggle
Toggle
0
N/A
N/A
0
N/A
N/A
0
0
1
0
Notes:
1. DQ5 switches to 1 when an Embedded Program, Embedded Erase, or Write-to-Buffer operation exceeds 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. The Data# Polling algorithm should be used to monitor the last loaded write-buffer address location.
4. DQ1 switches to 1 when the device aborts the write-to-buffer operation.
June 1, 2005 S70GL01GN00_00_A1
S70GL01GN00 MirrorBit^TM Flash
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