SH7052: how to prevent FDT to erase memory while get connected?

Hi guys,

I'm using the Renesas FDT to re-flash the SH7052 via serial comunication but every time I connect to the board the memory is cleaned up (all 0xFF).

Can you give me some info?

Is that bheavior appied to all SH famly? Is there a way to prevent the automatic erase?

Thanks!

0 FrankL over 3 years ago

This is device specification. I think it is used for all SH devices, but I'm not sure of this.
It cannot be avoided in SH7052.
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0 Markino over 3 years ago in reply to FrankL

Thanks Frank for your reply!
If I'm not wrong there are some SW that can read the SH family, via serial connection, without clean up the memory...
I'd like to understand how this kind of "protection" has been done in the micro and how that SW can by-pass it if it was made for security. Maybe it's just a feature that can be enable/disable not a real security feature!?
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0 Mike Clements over 3 years ago in reply to Markino

Markino,

Have you resolved your issue?

Mike Clements
RenesasRulz Moderator
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0 James over 2 years ago

Hallo,
I have the same problem. Is it possible to read the read the sh70xx with ftd before eraseing the chip?
Thanks, James
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0 James over 2 years ago in reply to Mike Clements

Hallo,
I have the same problem. Is it possible to read the read the sh70xx with ftd before eraseing the chip?
Thanks, James
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0 Beamwriter over 2 years ago in reply to James

Hey guys,
I'v solved the issue and now I can read SH7052F and SH7054F ECUs without erasing the ROM at first!
If you're interested on my SW just drop me PM... ;)
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0 khtnguyen over 2 years ago in reply to Beamwriter

hello , i'm verry interested because this is my problem verry long time.
how to do it?
i don't know how to sent PM for you.
thanks.
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0 A.Smith over 2 years ago in reply to Beamwriter

I'm interested, but can't find the PM function on here.
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0 Dangolp over 1 year ago in reply to Beamwriter

Hi, I'm interested to your software but I can't find PM function
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0 aboeys over 1 year ago in reply to Beamwriter

how I contacted you, I am very interested in your SW
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0 TuneBoy 3 months ago in reply to James

Did anyone get a reply.

I also want to read the SH7052 without erasing, I tried to send PM but it has "Cannot message" when I try to send a message to BeamWriter
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