SST39VF1602C-70-4C-MAKE View Datasheet(PDF) - Silicon Storage Technology

Part Name

Description

MFG CO.

SST39VF1602C-70-4C-MAKE

16 Mbit (x16) Multi-Purpose Flash Plus

Silicon Storage Technology 

A Microchip Technology Company

16 Mbit Multi-Purpose Flash Plus

SST39VF1601C / SST39VF1602C

Data Sheet

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 accomplished 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 inad-

vertent transient condition that apparently causes the device to behave abnormally, e.g., not read cor-

rectly. Please note that the Software ID Exit/CFI Exit command is ignored during an internal Program

or Erase operation. See Table 7 for software command codes, Figure 16 for timing waveform, and Fig-

ure 25 for flowcharts.

Security ID

The SST39VF1601C/1602C devices offer a 136 Word Security ID space. The Secure ID space is

divided into two segments—one factory programmed segment and one user programmed segment.

The first segment is programmed and locked at SST with a random 128-bit number. The user segment,

with a 128 word space, 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.

The Secure ID space can be queried by executing a three-byte command sequence with Enter Sec ID

command (88H) at address 555H in the last byte sequence. To exit this mode, the Exit Sec ID com-

mand should be executed. Refer to Table 7 for more details.

©2011 Silicon Storage Technology, Inc.

13

DS-25018A

05/11

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