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Altera_Forum
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17 years ago

Stratix III JTAG Failure

Hi All, I have problem on Stratix III device on my Custom development board. Device: Stratix III - EP3SL340 Download cable : Altera USB Blaster We have provided two configura...
Altera_Forum's avatar
Altera_Forum
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17 years ago

Hi Jack,

FYI --> This board was working fine for quite long time. Suddenly JTAG interface is not able to detect the Device.

Measured the 1K resistor is value & it is fine.Also measeured the impedance from connector as well fom FPGA TCK pin It shows 2 ohm.

I am not in position to suspect LAYOUT, Since enough spacing(200mil) is provided for TCK signal. we are using Allegro for our LAYOUT. Infact all other boards are working fine.

It is not a lead free board. Components are leadfree & but assembled with leaded profile.

Kalidoss