Reserved Area in ST72C334N2/N4

adolfo · ‎2003-03-18

Posted on March 19, 2003 at 05:40

adolfo · ‎2003-03-18

Posted on March 19, 2003 at 05:24

Hello

I have a customer that is interested to know more about the reseved memory area in the ST72C334N2/N4 microcontroller .

He need this information because he is devoloping an application that require safety information .

Just to clarify I'll give you a question list that come from my customer :

1) What is written in Reserved area , because if the program counter go inside this area I need to know what can happen .

2) Is It possibile to fill this area with all FFH or 00 to avoid any kind of impredictable situation if the program counter go inside it .

3) I had experience with ST6 (ST62T32) and with this microcontroller was possible to fill the reserved area .

It is very important to know this information , otherwise the customer will choose other microcontroller from other supplier .

Please help me

Thanks

Vikingo

simonharrison9 · ‎2003-03-18

Posted on March 19, 2003 at 05:40

Hi,

As far as I'm aware, the reserved area contains nothing and test code.

The ST7 can address the whole 64k memory area, the PC can contain any value from 0 - 65535.

You can try to execute anywhere !

As some of the area has nothing, it can not be loaded with a value.

There is no way to guarantee the software operation in these conditions.

You have the watchdog if it jumps into nowhere and gets stuck there.

Simon

[ This message was edited by: sjh on 12-11-2003 16:21 ]