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5,170 Views
Registered: ‎03-21-2012

Read a (maybe unlock) chip ?

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Hello all,

 

I want to dump a xilinx chip to make a copy of a board because I can't buy it, the seller closed so I needto do this.

It's a daughter board for a nissan skyline GTR R34 ECU, this board is from technosquare

 

However if I try to read the chip and if it's lock, will it be corrupted ? (like some protections for CD/DVD game) or Will I just have an ecrypted dump file ? The chip is a XC95144

 

Thanks for all.

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Professor
Professor
6,557 Views
Registered: ‎08-14-2007

Re: Read a (maybe unlock) chip ?

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Reading the chip will not hurt it.  As I recall, these older parts have no encryption, but they might

have a "security fuse" which essentially prevents readback.  If the security feature is set, then

wht you read back will be something like all 1's.  In any case it's useless.  So you can't copy

the chip if the security is set.

 

-- Gabor

-- Gabor

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5 Replies
Professor
Professor
6,558 Views
Registered: ‎08-14-2007

Re: Read a (maybe unlock) chip ?

Jump to solution

Reading the chip will not hurt it.  As I recall, these older parts have no encryption, but they might

have a "security fuse" which essentially prevents readback.  If the security feature is set, then

wht you read back will be something like all 1's.  In any case it's useless.  So you can't copy

the chip if the security is set.

 

-- Gabor

-- Gabor

View solution in original post

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Historian
Historian
5,156 Views
Registered: ‎02-25-2008

Re: Read a (maybe unlock) chip ?

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Most of us are not in the business of helping people clone IP. Sorry.

----------------------------Yes, I do this for a living.
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Professor
Professor
5,154 Views
Registered: ‎08-14-2007

Re: Read a (maybe unlock) chip ?

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I forgot to add that another "feature" of a security fuse is that even if the part is re-programmable,

you must erase the entire part in order to reset the security fuse.  Thus if you try to "unlock"

the chip you will erase it and cannot copy it.

 

-- Gabor

-- Gabor
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5,145 Views
Registered: ‎03-21-2012

Re: Read a (maybe unlock) chip ?

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Thanks for your reply guys,

 

I just wanted to be sure (I work on some microchip chip) so I hope the chip have not this fuse...

 

I must clone it because this board it's not in selling anymore that's why I must do that.

 

 

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Historian
Historian
5,142 Views
Registered: ‎02-25-2008

Re: Read a (maybe unlock) chip ?

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@bigboss59400 wrote:

Thanks for your reply guys,

 

I just wanted to be sure (I work on some microchip chip) so I hope the chip have not this fuse...

 

I must clone it because this board it's not in selling anymore that's why I must do that.

 

 


You MUST clone it? Regardless of its production status, the company that made the part owns the design and as such you are not entitled to clone it unless they've given you a license to do so.

 

Having said that, when you fire it up the first time, please video it so we can see your car blow up!

----------------------------Yes, I do this for a living.