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???
09/30/04 15:25
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#78438 - uPSD and LJMP
Hi, All:
I have a question about uPSD3234A CPU.
In this CPU, there are two flashes in it, one is called Secondary Flash, One is called Main Flash, acutally all the boot stuff is from secondary flash. In my project, I want to put monitor code in secondary flash and main application in Main Flash. Their address is 0-7FFFh and 8000-FFFFh.

for testing purpose, what I did is I made two pieces HEX file and use PSDexpress download them into uPSD. They start from 0 and 8000h. After powered up, I use LJMP 8000h and I hope that code will jump to 8000h and start doing something..

But I found that although I used LJMP 8000h, and actually I don't know where they jumped..

Any ideas about two flashes jumping and swaping?

Thanks.

Frank





List of 3 messages in thread
TopicAuthorDate
uPSD and LJMP            01/01/70 00:00      
   RE: uPSD and LJMP            01/01/70 00:00      
   RE: problem solved            01/01/70 00:00      

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