AM29LV640MH SPANSION [SPANSION], AM29LV640MH Datasheet - Page 30

• Manufacturer Part Number: AM29LV640MH
• Description: 64 Megabit (4 M x 16-Bit/8 M x 8-Bit) MirrorBit 3.0 Volt-only Uniform Sector Flash Memory with VersatileI/O Control
• Manufacturer: SPANSION [SPANSION]

28
DQ1 = 1?
(Note 3)
No
Yes
(Note 1)
(Note 2)
Yes
No
Write next address/data pair
Write number of addresses
to program minus 1(WC)
Write first address/data
Write program buffer to
address = Last Loaded
Read DQ7 - DQ0 with
Write “Write to Buffer”
Last Loaded Address
flash sector address
and Sector Address
Read DQ7 - DQ0 at
Buffer Operation?
FAIL or ABORT
Sector Address
command and
Figure 4. Write Buffer Programming Operation
Abort Write to
WC = WC - 1
DQ7 = Data?
DQ7 = Data?
DQ5 = 1?
Address
WC = 0 ?
Yes
No
No
No
No
D A T A S H E E T
Yes
Yes
Yes
Am29LV640MH/L
Part of “Write to Buffer”
Command Sequence
Write to buffer ABORTED.
Must write “Write-to-buffer
Abort Reset” command
Write to a different
sequence to return
sector address
to read mode.
PASS
Notes:
1.
2. DQ7 may change simultaneously with DQ5.
3. If this flowchart location was reached because
4.
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.
Therefore, DQ7 should be verified.
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.
See
write buffer programming.
Table 11
for command sequences required for
December 14, 2005