Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

altmemphy with 2 ram chips

hello all, Now I'm trying to implement one controller using Altmemphy to interface with two 8-bit DDR2 SDRAM chips on Stratix3.But when I share the address and control signals to both of these dev...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

My Cyclone III dev board was giving me the same kind of problems with Quartus 8.0sp1. I used sopc builder to create a ddr2 controller, but I couldn't split the address and other control lines required to access both "top" and "bot" ram without recieving "has invalid signal-splitter fan-outs.". Sopc builder even has the dev board's exact memory configuration as a preset.

Happy enough with 128MByte of memory without ecc so I'll just wait til altera get their act together.