16 Mbit Concurrent SuperFlash + 2/4/8 Mbit SRAM ComboMemory
SST34HF1602C / SST34HF1622C / SST34HF1642C
SST34HF1642D / SST34HF1682D / SST34HF1622S / SST34HF1642S
Advance Information
TABLE 7: 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
Addr1 Data2 Addr1 Data2 Addr1 Data2 Addr1 Data2 Addr1 Data2 Addr1 Data2
5555H
5555H
5555H
5555H
XXXXH
XXXXH
5555H
5555H
AAH
AAH
AAH
AAH
B0H
30H
2AAAH
2AAAH
2AAAH
2AAAH
55H
55H
55H
55H
5555H
5555H
5555H
5555H
A0H
80H
80H
80H
WA3
Data
AAH
AAH
AAH
Word-/Byte-Program
Sector-Erase
4
4
5555H
5555H
5555H
2AAAH
2AAAH
2AAAH
55H
55H
55H
SAX
BAX
30H
50H
10H
Block-Erase
5555H
Chip-Erase
Erase-Suspend
Erase-Resume
Query Sec ID5
AAH
AAH
2AAAH
2AAAH
55H
55H
5555H
5555H
88H
A5H
SIWA6
XXH
Data
User Security ID
Word-/Byte-Program
5555H
AAH
2AAAH
55H
5555H
85H
0000H
User Security ID
Program Lock-out7
9
Software ID Entry8
5555H
5555H
AAH
AAH
2AAAH
2AAAH
55H
55H
BKX
90H
F0H
5555H
5555H
Software ID Exit/
Sec ID Exit10,11
XXH
F0H
Software ID Exit/
Sec ID Exit10,11
T7.0 1256
1. Address format A14-A0 (Hex), Addresses A19-A15 can be VIL or VIH, but no other value, for the command sequence when in x16 mode.
When in x8 mode, Addresses A19-A15, Address A-1 and DQ14-DQ8 can be VIL or VIH, but no other value, for the command sequence.
2. DQ15-DQ8 can be VIL or VIH, but no other value, for the command sequence
3. WA = Program word/byte address
4. SAX for Sector-Erase; uses A19-A10 address lines
BAX for Block-Erase; uses A19-A15 address lines
5. For SST34HF16x2C/D/S,
SST ID is read with A3 = 0 (Address range = 00000H to 00007H),
User ID is read with A3 = 1 (Address range = 00010H to 00017H).
Lock Status is read with A7-A0 = 000FFH. Unlocked: DQ3 = 1 / Locked: DQ3 = 0.
6. SIWA = User Security ID Program word/byte address
For SST34HF16x2C/D/S, valid Word-Addresses for User Sec ID are from C0010H-C0017H.
All 4 cycles of User Security ID Word-Program and Program Lock-out must be completed before going back to Read-Array mode.
7. The User Security ID Program Lock-out command must be executed in x16 mode (BYTE#=VIH).
8. The device does not remain in Software Product Identification mode if powered down.
9. A19 and A18 = VIL
10. Both Software ID Exit operations are equivalent
11. If users never lock after programming, User Sec ID can be programmed over the previously unprogrammed bits (data=1) using the
User Sec ID mode again (the programmed “0” bits cannot be reversed to “1”).
For SST34HF16x2C/D/S, valid Word-Addresses for User Sec ID are from C0010H-C0017H.
©2004 Silicon Storage Technology, Inc.
S71256-00-000
3/04
14
SST [ SILICON STORAGE TECHNOLOGY, INC ]
