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Altera_Forum
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17 years ago

Stratix III JTAG/POR Issue

Greetings, I'm working with a Stratix III FPGA (EPSL70F484) on a custom PCB configured in a JTAG / AS configuration with a EPSC16 and ran into a nasty problem. When I first powered up the board...
Altera_Forum's avatar
Altera_Forum
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16 years ago

Hello Alfed,

I have a costum PCB with a EP3SL50F780 on it. Till now I had no problems with JTAG-configuration but I had this temperatur issue that u are describing... In fact, the FPGA temperature goes up till 50°C with a simple 'counterdesign' and till 70+°C with our complete Design. What temps do u have?

Yesterday, the JTAG-config stopped working. I thought it's because of the temperature issue but now I'm not so sure anymore...

Are u sure that ur I/Os are sinking/sourcing instead being HighZ? This would be wired but if u are sure it is the reason why your FPGA is getting hot.

regards,

helac