NIOS2 reset under high temperature

[Altera_Forum]

Hi all, 

 I am currently working with a Cyclone III and I have a problem with my NIOSII when the temperature reach around 83 °.  My NIOSII code is executed in a DDR memory and when my CycloneIII reaches this temperature, my NIOSII is reseting  I have few ideas: * Noise on the core voltage with this temperature. * Access time in the DDR too long (so the NIOSII is executing bads intructions). * Bad constraints in timequest.  How can i identify the source of this problem ? Have you some ideas to fix it ?  Thanks.

[Altera_Forum]

are you passing timing? what is your clock rates for nios and ram?

[Altera_Forum]

Hello, 

 I've exactly the same problem but it's not nios2 reset but a FPGA reconfiguration.  Someone can help me ?   DDR at 166.67 MHz (same problem with DDR at 133.33 MHz) Nios2 at 100MHz   Thanks