Protect 4 Flashs in IFlash

[rana]

Posted on November 12, 2006 at 06:10

Protect 4 Flashs in IFlash

[rana]

Posted on November 06, 2006 at 09:09

Hello all.

I use ST10F276, and I would like to protect first 4 Sectors in Bank0(B0F0-3).

Is posible?

How?

I DON'T want to disable any access to the whole Flash due to my application specific.

Thank you.

Ran Aricha

[ This message was edited by: Ran on 06-11-2006 13:57 ]

[najoua]

Posted on November 08, 2006 at 04:16

Hello,

There are two kinds of protection in the ST10F276:

- write protection to avoid unwanted writings

- access protection to avoid piracy

Write protection can be applied to the Flash sectors individually by clearing WxPy bits(x= bank; y=sector) in Flash Non Volatile Write Protection registers.

For example, to enable Write Protection of sectors B0F3-0 of Bank 0 in IFLASH module:

FCR0H|= 0x0100; /*Set SPR in FCR0H*/

FARL = 0xDFB4; /*Load Add of register FNVWPIRL in FARL*/

FARH = 0x000E; /*Load Add of register FNVWPIRL in FARH*/

FDR0L = 0xFFF0; /*Load Data in FDR0L*/

FDR0H = 0xFFFF; /*Load Data in FDR0H*/

FCR0H|= 0x8000; /*Operation start*/

Regarding the access protection, it is applied to the whole IFLASH memory (it can not be applied to a sector).

For more details, please refer to the ST10F276 datasheet, section 5.5 Protection Strategy, page 36.

I hope this helps you,

Best regards,

Najoua.

[rana]

Posted on November 12, 2006 at 06:10

Thank you.

I meant access protection (piracy access).

I understood I can't protect 4 Flashs only...(?)

Do I need more commands more than:

Protection:

FCR0H |= 0x0100; /* set protection operation */

FARL = 0xDFB8; /* load FNVAPR0 */

FARH = 0x000E;

FDR0L = 0xFFFE; /* DBGP = 1, ACCP = 0 */

FCR0H |= 0x8000; /* operation start */

Unprotection:

FCR0H |= 0x0100; /* set protection operation */

FARL = 0xDFB8; /* load FNVAPR0 */

FARH = 0x000E;

FDR0L = 0xFFFF; /* DBGP = ACCP = 1 */

FCR0H |= 0x8000; /* operation start */

Thanks in advance...

Ran