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Altera_Forum
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12 years ago

Can't boot with code in sdram

I've made a sopc system in which the niosii cpu's reset vector is in cfi_flash and exception vector is in sdram. I can run and debug my program in eclipse very well, but when I use flash programme...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

The problem is solved, I'm using sdram K4S641632k. I know that the problem is very likely related to the byte enable signal.

So I double checked the ldqm and udqm signal of sdram, it's connected to the fpga correctly.

I was shocked ten minutes ago when the pcb designer tell me he had switched the high/low byte signals of sdram for easy routing.