am49lv128bm Meet Spansion Inc., am49lv128bm Datasheet - Page 30
![no-image](/images/no-image-200.jpg)
am49lv128bm
Manufacturer Part Number
am49lv128bm
Description
Stacked Multi-chip Package Mcp ,128 Megabit 8 M ? 16-bit ,uniform Sector Flash Memory And 32 Mbit 2 M ? 16-bit Pseudo-static Ram With Page Mode Featuring Mirrorbit Technology,supplemental Datasheet
Manufacturer
Meet Spansion Inc.
Datasheet
1.AM49LV128BM.pdf
(98 pages)
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28
DQ1 = 1?
No
Yes
(Note 3)
(Note 1)
Yes
(Note 2)
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
Write “Write to Buffer”
Read DQ7 - DQ0 with
Last Loaded Address
flash sector address
and Sector Address
Read DQ7 - DQ0 at
Buffer Operation?
Sector Address
FAIL or ABORT
command and
Abort Write to
WC = WC - 1
DQ7 = Data?
DQ7 = Data?
Figure 3. Write Buffer Programming Operation
DQ5 = 1?
Address
WC = 0 ?
No
Yes
No
No
No
Yes
Yes
Yes
Am49LV128BM
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 Tables 9 and 10 for command sequences
required for write buffer programming.
June 17, 2004
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