SST26WF032 datasheet(8/36 Pages) SST

8 / 36 page

S71409-01-000

01/10

1.8V Serial Quad I/O (SQI) Flash Memory

SST26WF032

Advance Information

Write-Protection Lock-Down

To prevent changes, the Block-Protection register can be set to Write-Protection Lock-Down using the

Lock Down Block Protection Register (LPBR) command. Once the Write-Protection Lock-Down is

enabled, the Block-Protection register can not be changed. To avoid inadvertent lock down, the WREN

command must be executed prior to the LBPR command.

To reset Write-Protection Lock-Down, power cycle the device. The Write-Protection Lock-Down status

may be read from the Status register.

Security ID

SST26WF032 offers a 256-bit Security ID (Sec ID) feature. The Security ID space is divided into two

parts – one factory-programmed, 64-bit segment and one user-programmable 192-bit segment. The

factory-programmed segment is programmed at SST with a unique number and cannot be changed.

The user-programmable segment is left unprogrammed for the customer to program as desired.

Use the SecID Program command to program the Security ID using the address shown in Table 7.

Once programmed, the Security ID can be locked using the Lockout Sec ID command. This prevents

any future write to the Security ID.

The factory-programmed portion of the Security ID can’t be programmed by the user; neither factor-

programmed nor user-programmable areas can be erased.

SST26WF032 Datasheet(PDF) 8 Page - Silicon Storage Technology, Inc