1 Mbit / 2 Mbit / 4 Mbit Multi-Purpose Flash
SST39LF010 / SST39LF020 / SST39LF040
A Microchip Technology Company
SST39VF010 / SST39VF020 / SST39VF040
Data Sheet
Operations
Table 3: Operation Modes Selection
Mode
Read
Program
Erase
CE#
V IL
V IL
V IL
OE#
V IL
V IH
V IH
WE#
V IH
V IL
V IL
DQ
D OUT
D IN
X 1
Address
A IN
A IN
Sector address,
XXH for Chip-Erase
Standby
Write Inhibit
V IH
X
X
X
V IL
X
X
X
V IH
High Z
High Z/ D OUT
High Z/ D OUT
X
X
X
Product Identification
Software Mode
V IL
V IL
V IH
See Table 4
T3.4 25023
1. X can be V IL or V IH , but no other value.
Table 4: Software Command Sequence
Command
Sequence
1st Bus
Write Cycle
2nd Bus
Write Cycle
3rd Bus
Write Cycle
4th Bus
Write Cycle
5th Bus
Write Cycle
6th Bus
Write Cycle
Addr 1
Data
Addr 1
Data Addr 1
Data Addr 1
Data
Addr 1
Data Addr 1
Data
Byte-Program
5555H AAH 2AAAH
55H
5555H A0H
BA 2
Data
Sector-Erase
Chip-Erase
5555H AAH 2AAAH
5555H AAH 2AAAH
55H
55H
5555H
5555H
80H
80H
5555H AAH 2AAAH
5555H AAH 2AAAH
55H
55H
SA X3
5555H
30H
10H
Software ID
5555H AAH 2AAAH
55H
5555H
90H
Entry 4,5
Software ID Exit 6
XXH
F0H
Software ID Exit 6
5555H AAH 2AAAH
55H
5555H
F0H
T4.2 25023
1. Address format A 14 -A 0 (Hex),
Addresses A MS -A 15 can be V IL or V IH , but no other value, for the Command sequence.
A MS = Most significant address
A MS = A 16 for SST39LF/VF010, A 17 for SST39LF/VF020, and A 18 for SST39LF/VF040
2. BA = Program Byte address
3. SA X for Sector-Erase; uses A MS -A 12 address lines
4. The device does not remain in Software Product ID mode if powered down.
5. With A MS -A 1 = 0; SST Manufacturer’s ID = BFH, is read with A 0 = 0,
SST39LF/VF010 Device ID = D5H, is read with A 0 = 1,
SST39LF/VF020 Device ID = D6H, is read with A 0 = 1,
SST39LF/VF040 Device ID = D7H, is read with A 0 = 1.
6. Both Software ID Exit operations are equivalent
?2011 Silicon Storage Technology, Inc.
11
DS25023A
08/11
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