P r e l i m i n a r y
Write “Write to Buffer”
command and
Sector Address
Part of “Write to Buffer”
Command Sequence
Write number of addresses
to program minus 1(WC)
and Sector Address
Write first address/data
Yes
WC = 0 ?
No
Write to a different
sector address
Abort Write to
Buffer Operation?
Yes
Write to buffer ABORTED.
Must write “Write-to-buffer
Abort Reset” command
sequence to return
No
Write next address/data pair
(Note 1)
to read mode.
WC = WC - 1
Write program buffer to
flash sector address
Read DQ7 - DQ0 at
Last Loaded Address
Notes:
1. When Sector Address is specified, any address in
the selected sector is acceptable. However, when
loading Write-Buffer address locations with data, all
addresses must fall within the selected Write-Buffer
Page.
Yes
DQ7 = Data?
No
2. DQ7 may change simultaneously with DQ5.
Therefore, DQ7 should be verified.
No
3. If this flowchart location was reached because
DQ5= “1”, then the device FAILED. If this flowchart
location was reached because DQ1= “1”, then the
Write to Buffer operation was ABORTED. In either
case, the proper reset command must be written
before the device can begin another operation. If
DQ1=1, write the Write-Buffer-Programming-
Abort-Reset command. if DQ5=1, write the Reset
command.
No
DQ1 = 1?
DQ5 = 1?
Yes
Yes
Read DQ7 - DQ0 with
address = Last Loaded
Address
4. See Table 31 and Table 32 for command
sequences required for write buffer programming.
Yes
(Note 2)
DQ7 = Data?
No
FAIL or ABORT
PASS
(Note 3)
Figure 3. Write Buffer Programming Operation
April 30, 2004 S29GLxxxM_00A5
S29GLxxxM MirrorBitTM Flash Family
107
SPANSION [ SPANSION ]
