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Altera_Forum
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16 years ago

JTAG can’t find device

Hi all, I am a beginner of Altera's device. Today, When I use the JTAG mode of Quartus’ programmer to configure the device EP3C5E144, the programmer always says “Unable to scan device chain. Can...
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Altera_Forum
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16 years ago

Dear all:

I have the same problem with ytggsitp when configuring the device EP3SL340H1152. the VVCCIO of

bank 1A is 2.5V.When the programmer tried to scan the chain, I test the TDI, TDO,TMS and TCK.

There is data wave on TCK ,TMS and TDI, but the TDO never change and always hold about 0 V(Why?I think the output of TDO should be at 2.5V at the begining,am I right?? ). All the power is OK.

Thank you very much!!!:)