SST39SF020 Silicon Storage Technology, SST39SF020 Datasheet - Page 6

• Manufacturer Part Number: SST39SF020
• Description: 2 Megabit (256K x 8) Multi-Purpose Flash
• Manufacturer: Silicon Storage Technology

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T
Notes:
Notes for Software ID Entry Command Sequence
© 1998 Silicon Storage Technology, Inc.
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Command
Sequence
Byte Program
Sector Erase
Chip Erase
Software ID Entry 5555H AAH
Software ID Exit
Software ID Exit
ABLE
(1)
(2)
(3)
(4)
1. With A
2. The device does not remain in Software Product ID Mode if powered down.
Address format A
Command sequence.
SA
BA = Program Byte address
Both Software ID Exit operations are equivalent
4: S
SST39SF020 Device Code = B6H, is read with A
x
for sector erase; uses A
OFTWARE
17
-A
1
=0; SST Manufacturer Code = BFH, is read with A
Addr
C
5555H AAH
5555H AAH
5555H AAH
XXH
5555H AAH
Write Cycle
14
OMMAND
-A
1st Bus
0
(1)
(Hex), Addresses A
Data
F0H
S
17
EQUENCE
-A
12
Addr
2AAAH
2AAAH
2AAAH
2AAAH
2AAAH
address lines
Write Cycle
2nd Bus
(1)
15,
A
Data
55H
55H
55H
55H
55H
16
and A
0
= 1.
17
Addr
5555H
5555H
5555H
5555H
5555H
are a “Don’t Care” for the
Write Cycle
3rd Bus
(1)
6
0
= 0,
A0H
Data
80H
80H
90H
F0H
Addr
BA
5555H
5555H
Write Cycle
(3)
4th Bus
2 Megabit Multi-Purpose Flash
(1)
Data
Data
AAH
AAH
Addr
2AAAH
2AAAH
Write Cycle
5th Bus
Preliminary Specifications
(1)
Data
55H
55H
SST39SF020
Addr
SA
5555H 10H
Write Cycle
6th Bus
x
(2)
326 PGM T4.0
(1)
326-10 12/98
Data
30H