TMP89FS60 datasheet(375/410 Pages) TOSHIBA

375 / 410 page

Page 361

TMP89FS60

RA002

22.12.2Security program

The security program can be used in parallel and serial PROM modes and for OCD. It has a special memory

for protection, and a special command is required to make this protection setting. If the security program is

enabled, the reading or writing of flash memory in parallel PROM mode is prohibited. In serial PROM mode,

the read and write of flash memory and other operation commands cannot be used. In performing OCD, two

options about system startup are provided: prohibiting the system startup by using an option code and starting

the system by password authentication.

22.12.2.1How the security program functions

With the TMP89FS60, you can control the read of flash memory by writing protection-related informa-

tion to a specially-designed memory. Because protection-related information is written to this specially-

designed memory, no user memory resource are required.

22.12.2.2Enabling or disabling the security program

• Enabling the security program

To enable the security program, execute the flash memory security setting command.

• Disabling the security program

To disable the security program, execute Chip Erase of the flash memory erase command.

TMP89FS60 Datasheet(PDF) 375 Page - Toshiba Semiconductor