32 Mbit Concurrent SuperFlash
SST36VF3203 / SST36VF3204
Data Sheet
Security ID
The SST36VF320x devices offer a 136-word Security ID
space. The Secure ID space is divided into two seg-
ments—one 128-bit factory programmed segment and one
128-word (256-byte) user-programmed segment. The first
segment is programmed and locked at SST with a unique,
128-bit number. The user segment is left un-programmed
for the customer to program as desired. To program the
user segment of the Security ID, the user must use the
Security ID Program command. End-of-Write status is
checked by reading the toggle bits. Data# Polling is not
used for Security ID End-of-Write detection. Once pro-
gramming is complete, the Sec ID should be locked using
the User Sec ID Program Lock-Out. This disables any
future corruption of this space. Note that regardless of
whether or not the Sec ID is locked, neither Sec ID seg-
ment can be erased. The Secure ID space can be queried
by executing a three-byte command sequence with Query
Sec ID command (88H) at address 555H in the last byte
sequence. See Figure 14 for timing diagram. To exit this
mode, the Exit Sec ID command should be executed.
Refer to Table 7 for more details.
address from the same bank without issuing a new Soft-
ware ID Entry command. The Software ID Entry command
may be written to an address within a bank that is in Read
Mode or in Erase-Suspend mode. The Software ID Entry
command may not be written while the device is program-
ming or erasing in the other bank.
TABLE 2: P
RODUCT
I
DENTIFICATION
Address
Manufacturer’s ID
Device ID
SST36VF3203
SST36VF3204
Note:
BK
X
= Bank Address (A
20
-A
18
)
Data
00BFH
7354H
7353H
T2.1 1270
BK
X
0000H
BK
X
0001H
BK
X
0001H
Product Identification Mode
Exit/CFI Mode Exit
In order to return to the standard Read mode, the Software
Product Identification mode must be exited. Exit is accom-
plished by issuing the Software ID Exit command
sequence, which returns the device to the Read mode. This
command may also be used to reset the device to the Read
mode after any inadvertent transient condition that appar-
ently causes the device to behave abnormally, e.g., not read
correctly. Please note that the Software ID Exit/CFI Exit
command is ignored during an internal Program or Erase
operation. See Table 7 for the software command code, Fig-
ure 13 for timing waveform and Figure 21 for a flowchart.
Product Identification
The Product Identification mode identifies the devices and
manufacturer. For details, see Table 2 for software opera-
tion, Figure 11 for the Software ID Entry and Read timing
diagram and Figure 21 for the Software ID Entry command
sequence flowchart. The addresses A
20
and A
18
indicate a
bank address. When the addressed bank is switched to
Product Identification mode, it is possible to read another
F
UNCTIONAL
B
LOCK
D
IAGRAM
Memory
Address
Address
Buffers
(8 KWord / 16 KByte
Sector Protection)
SuperFlash Memory
Bank 1
BYTE#
RST#
CE#
WP#
WE#
OE#
RY/BY#
1270 B01.0
SuperFlash Memory
Bank 2
Control
Logic
I/O Buffers
DQ
15
/A
-1
-
DQ
0
©2005 Silicon Storage Technology, Inc.
S71270-03-000
7/06
6
SST [ SILICON STORAGE TECHNOLOGY, INC ]
