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Load and Run in the STR71x External Flash

hichem2
Associate II
Posted on October 20, 2004 at 09:16

Load and Run in the STR71x External Flash

3 REPLIES 3
hichem2
Associate II
Posted on October 11, 2004 at 08:46

Hi all,

I come just to begin to use the STR71x external flash. Several things adorned me strange.

At first time I succeeded to lode and run a program from the External flash and I correctly can have the result.

After some essays I retry with the same test but despite that the process of load is correctly done. I can have anything and the program does not work correctly.

If I verify the content of the external flash really nothing is written in the memory!!

Any one can explain for me this behavior.

Best Regards

HICH

hichem
Associate II
Posted on October 20, 2004 at 09:15

[ This message was edited by: Hichem on 20-10-2004 12:52 ]
hichem
Associate II
Posted on October 20, 2004 at 09:16

Hi,Hich

I try again with a STR71x External flash test and you find at the following a detailed description of the problem status and the possible solutions:

=>The problem that the STR71x external used flash present a write protection feature and this is Irreversible.

Write Protect is an input that gives an additional hardware protection for

each block. When Write Protect is activated, the Lock-

Down is enabled and the protection status of

the block cannot be changed .

=>Solutions:

1- Start with a bank 1 of the memory, bank 0 is not available, so you can't boot from the external flash.

2- Change the flash with another one who present the same footprint and without the protection feature.

With best regards.

Hichem