Datasheet
©2011 Silicon Storage Technology, Inc. DS-25015A 04/11
27
64 Mbit (x16) Advanced Multi-Purpose Flash Plus
SST38VF6401 / SST38VF6402 / SST38VF6403 / SST38VF6404
Data Sheet
A
Microchip Technology Company
Note: Table 11 uses the following abbreviations:
X = Don’t care (V
IL
or V
IH
, but no other value.
SA
X
= Sector Address; uses A
MS
-A
12
address lines
BA
X
= Block Address; uses A
MS
-A
15
address lines
WA = Word Address
WC = Word Count
PWA
X
= Password Address; PWA
X
=PWA
0
,PWA
1
,PWA
2
or PWA
3;
A1 and A0 are used to select each 16-bit portion of
the password
PWD
X
= Password Data; PWD
X
= PSWD
0
, PWD
1
, PWD
2
,orPWD
3
A
MS
= Most significant Address
4. Total number of cycles in this command sequence depends on the number of words to be written to the buffer.
Additional words are written by repeating Write Cycle 5. Address (WA
X
) values for Write Cycle 6 and later must have the
same A21-A4 values as WA
X
in Write Cycle 5.
WC = Word Count. The value of WC is the number of words to be written into the buffer, minus 1. Maximum WC value is
15 (i.e. F Hex)
5. Erase-Suspend and Erase-Resume commands are also available in Bypass Mode.
6. For SST39VF6403, Sector-Erase or Block-Erase can be used to erase sectors S1016 - S1023. Use address SAx. Block
Erase cannot be used to erase all 32kW of Block B127. For SST39VF6404, Sector-Erase or Block-Erase can be used to
erase sectors S0 - S7. Use address SAx. Block Erase cannot be used to erase all 32kW of Block B0.
7. Once in SEC ID mode, the Word-Program, Write-Buffer Programming, and Bypass Word-Program features can be used
to program the SEC ID area.
8. SST Unique ID is read with A
3
= 0 (Address range = 000000H to 000007H), User portion of SEC ID is read with A
8
=1
(Address range = 000100H to 0001FFH).
Lock-out Status is read with A
7
-A
0
= FFH. Unlocked: DQ
3
= 1 / Locked: DQ
3
= 0. Lock status can also be checked by
reading Bit ‘0’ in the PSR.
9. Both Software ID Exit operations are equivalent
10. If bits are not locked, then the user-programmable portion of the Sec ID can be programmed over the previously unpro-
grammed bits (Data =1) using the Sec ID mode again (bits programmed ‘0’ cannot be reversed to ‘1’). Valid Word-
Addresses for the user-programmable portion of the Sec ID are from 000100H-0001FFH.
11. The device does not remain in Software Product ID Mode if powered down.
12. With A
MS
-A
1
=0; SST Manufacturer ID = 00BFH, is read with A
0
=0,
SST38VF6401 Device ID = 536B, is read with A
0
= 1, SST38VF6402 Device ID = 536A, is read with A
0
=1,
SST38VF6403 Device ID = 536D, is ready with A
0
= 1, SST38VF6404 Device ID = 536C, is read with A
0
=1.
13. BA
X02
:A
MS
-A
15
= Block Address; A
14
-A
8
= xxxxxx; A
7
-A
0
=02
14. Data = 00H unprotected block; Data = 01H protected block.
15. DQ
0
= 0 means the Irreversible Block Lock command has been previously used. DQ
0
= 1 means the Irreversible Block
Lock command has not yet been used.
16. DQ
0
= 0 means that the Global Lock Bit is locked. DQ
0
= 1 means that the Global Lock Bit is unlocked.
17. For Non-Uniform Boot Block devices (i.e. 8 KWord size), in the boot area, use SA
X
= Sector Address (sector size = 4
KWord).
18. DQ
0
= 0 means protected; DQ
0
= 1 means unprotected
19. Erases all NVPBs to ‘1’ (unprotected)
20. Entire two-bus cycle sequence must be entered for each portion of the password.
21. Entire password sequence required for validation. The word order doesn’t matter as long as the Address and Data pair
match.
22. Reserved register bits (DQ
15
-DQ
5
and DQ
3
) must be ‘1’ during program.
23. CFI Query Entry and SST CFI Query Entry are equivalent. Both allow access to the same CFI tables.
24. Global Lock Bit must be ‘1’ before executing this command.