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Registered: ‎09-25-2017

xc9536 security bit

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dear all members:

i read xc9536 of hmi pcb by xeltek sp3000u in socket.in bufeer i see some bit 0 and some bits 1.in jed file.

how can i underestand the buffers is true or no?and how can i underestand the chip security bit activate or no?

and please tell me is it simple way for reading/writing to chip by jtag which software?please share or give me

 

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u4223374
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Registered: ‎04-26-2015

Xilinx does not tell people how the bitstream is constructed, so I doubt you'll have much luck there. However, I would expect that with the security bit set it'll either read all zeros or just refuse to read at all - so if you're able to read out a mixture of zeros and ones then it's probably not protected.

 

The normal tool to read/write Xilinx chips is Xilinx iMPACT, which is available as part of ISE Lab Tools (free). This will only work with Xilinx JTAG adaptors, and the list of adaptors that will still talk to an XC9536 is relatively small - you may have to hunt for a second-hand one on eBay.

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u4223374
Advisor
Advisor
945 Views
Registered: ‎04-26-2015

Xilinx does not tell people how the bitstream is constructed, so I doubt you'll have much luck there. However, I would expect that with the security bit set it'll either read all zeros or just refuse to read at all - so if you're able to read out a mixture of zeros and ones then it's probably not protected.

 

The normal tool to read/write Xilinx chips is Xilinx iMPACT, which is available as part of ISE Lab Tools (free). This will only work with Xilinx JTAG adaptors, and the list of adaptors that will still talk to an XC9536 is relatively small - you may have to hunt for a second-hand one on eBay.

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927 Views
Registered: ‎09-25-2017

hi scholar

thank you very much for help  and answer me.

best regards.

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