16 Mbit / 32 Mbit / 64 Mbit Multi-Purpose Flash Plus
SST39VF1601 / SST39VF3201 / SST39VF6401
SST39VF1602 / SST39VF3202 / SST39VF6402
Preliminary Specifications
Product Identification
Security ID
The Product Identification mode identifies the devices as
the SST39VF1601, SST39VF1602, SST39VF3201,
SST39VF3202, SST39VF6401, SST39VF6402, and
manufacturer as SST. This mode may be accessed soft-
ware operations. Users may use the Software Product
Identification operation to identify the part (i.e., using the
device ID) when using multiple manufacturers in the same
socket. For details, see Table 6 for software operation,
Figure 11 for the Software ID Entry and Read timing dia-
gram and Figure 21 for the Software ID Entry command
sequence flowchart.
The SST39VF160x/320x/640x devices offer a 256-bit
Security ID space. The Secure ID space is divided into two
128-bit segments - one factory programmed segment and
one user programmed segment. The first segment is pro-
grammed and locked at SST with a random 128-bit num-
ber. 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 Word-Program command. To
detect end-of-write for the SEC ID, read the toggle bits. Do
not use Data# Polling. Once this 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 segment can be erased.
TABLE 3: PRODUCT IDENTIFICATION
Address
Data
Manufacturer’s ID
Device ID
0000H
BFH
The Secure ID space can be queried by executing a three-
byte command sequence with Enter Sec ID command
(88H) at address 5555H in the last byte sequence. To exit
this mode, the Exit Sec ID command should be executed.
Refer to Table 6 for more details.
SST39VF1601
SST39VF1602
SST39VF3201
SST39VF3202
SST39VF6401
SST39VF6402
0001H
0001H
0001H
0001H
0001H
0001H
234BH
234AH
235BH
235AH
236BH
236AH
T3.2 1223
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
apparently 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 6 for software command
codes, Figure 13 for timing waveform, and Figures 21 and
22 for flowcharts.
©2003 Silicon Storage Technology, Inc.
S71223-03-000
11/03
5
SST [ SILICON STORAGE TECHNOLOGY, INC ]
