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Altera_Forum
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9 years ago

Configuration Cyclone V 5CEBA9F23C8N

I Design Board With 5CEBA9F23C8N I choose AS Configuration for programming & EPCS128 After Develop PCB I start to program my board STEP1- Compile My Design in quartus 16.1(SIMPLE LED ON...
Altera_Forum's avatar
Altera_Forum
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9 years ago

You can refer to the datasheet to know about the power sequence.

First the 1.1V is applied, then other supplies.

But I think it should work with any power on sequence.

BUT in the schematic, you left the rref_tl floating. It should be connected through 2KOhm resistor to the gnd. I faced this issue before and the PLLs of the FPGA did not work till I fixed this RREF_TL pin.

I don't know if RREF_TL affects the dclk or not. BUT it will surely affect the PLLs of the FPGA. Don't you intend to use the PLLs?