8 Megabit Multi-Purpose Flash
SST39VF800Q / SST39VF800
Advance Information
TABLE 4: SOFTWARE COMMAND SEQUENCE
Command
Sequence
1st Bus
Write Cycle
Addr(1) Data Addr(1) Data
2nd Bus
Write Cycle
3rd Bus
Write Cycle
Addr(1) Data Addr(1) Data
4th Bus
Write Cycle
5th Bus
Write Cycle
Addr(1) Data Addr(1) Data
6th Bus
Write Cycle
Word Program
Sector Erase
Block Erase
Chip Erase
5555H AAH
5555H AAH
5555H AAH
5555H AAH
2AAAH 55H
2AAAH 55H
2AAAH 55H
2AAAH 55H
2AAAH 55H
2AAAH 55H
5555H A0H
5555H 80H
5555H 80H
5555H 80H
5555H 90H
5555H 98H
WA(3)
Data
5555H AAH
5555H AAH
5555H AAH
2AAAH 55H SAx(2)
2AAAH 55H BAx(2)
30H
50H
2AAAH 55H 5555H 10H
Software ID Entry 5555H AAH
CFI Query Entry
5555H AAH
XXH F0H
Software ID Exit/
CFI Exit
Software ID Exit/
CFI Exit
5555H AAH
2AAAH 55H
5555H F0H
343 PGM T4.0
(1)
Notes:
Address format A14-A0 (Hex), Addresses A15, A16, A17 and A18 are “Don’t Care” for Command sequence.
(2)
SAx for Sector Erase; uses A18-A11 address lines
BAx, for Block Erase; uses A18-A15 address lines
(3)
(4)
(5)
WA = Program word address
Both Software ID Exit operations are equivalent
DQ15 - DQ8 are “Don’t Care” for Command sequence
Notes for Software ID Entry Command Sequence
1. With A18 -A1 =0; SST Manufacturer Code = 00BFH, is read with A0 = 0,
SST39VF800Q/VF800 Device Code = 2781H, is read with A0 = 1.
2. The device does not remain in Software Product ID Mode if powered down.
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TABLE 5: CFI QUERY IDENTIFICATION STRING
Address
Data
Data
10H
11H
12H
0051H
0052H
0059H
Query Unique ASCII string “QRY”
Primary OEM command set
13H
14H
0001H
0007H
15H
16H
0000H
0000H
Address for Primary Extended Table
Alternate OEM command set (00H = none exists)
Address for Alternate OEM extended Table (00H = none exits)
17H
18H
0000H
0000H
19H
1AH
0000H
0000H
343 PGM T5.1
Note 1: Refer to CFI publication 100 for more details.
© 1999 Silicon Storage Technology, Inc.
343-04 2/99
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SST [ SILICON STORAGE TECHNOLOGY, INC ]
