A d v a n c e I n f o r m a t i o n
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
Yes
DQ7 = Data?
No
No
No
DQ1 = 1?
DQ5 = 1?
Yes
Yes
Read DQ7 - DQ0 with
address = Last Loaded
Address
Yes
(Note 2)
DQ7 = Data?
No
FAIL or ABORT
PASS
(Note 3)
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.
2. DQ7 may change simultaneously with DQ5. Therefore, DQ7 should be verified.
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.
4. See Table 30 on page 54 and Table 31 on page 55 for command sequences required for write buffer programming.
Figure 3. Write Buffer Programming Operation
48
S29GL-A MirrorBit™ Flash Family
S29GL-A_00_A3 April 22, 2005
SPANSION [ SPANSION ]
