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Intel: When compiling with all IO pins set to VirtualPin for DDR3 controller verification, I get the following Fitter error: Please tell me the measures.
<Message>
Error (15852): Output port "O" of PSEUDO_DIFF_OUT primitive must drive only one OBUF primitive on the I port and cannot drive anything else
Category: External memory interface
Tools: Quartus® Prime / Quartus® II
device:-
DDR-related pins (DQ/DQS, CK, ADR, etc.) cannot be set to Virtual Pins because they have built-in macros that place them on I/O pads.
Therefore, try setting Virtual Pin only on the local side (Avalon side), not on the memory interface side.
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