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Altera_Forum
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14 years ago

m25p26

Hi everybody, I have finished a pcb design with a cyclone III Ep3c25q240, it is configurated in AS mode. There are two connector (10 pins), one for the JTAG and the other for the AS. When I dow...
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Altera_Forum
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14 years ago

I have debug the mem_test app and it stops when it's made an IORD in the ddr. I also have test the app with the signaltap but it doesn`t seem that it's working properly.

I think it could be a problem with the memory presets or maybe with the sttl2-standard. I use a serial resistance of 10 ohm (in dq pins) and 22 ohm (the rest ddr pins) for the driver; and 56 ohm attached to 1.25V in the load. ( I have omitted this bus termination for ras,cas,we,dm, ck, and dqs signals)

Thankyou in advance.