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Valued Contributor III
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Need help: Stratix II GX Audio-Video board and LVDS inputs

I am trying to use a Stratix II GX Audio-Video development board and have 

been able to get LVDS output going ok. 

 

However, when I try to use alt_inbuf to get the LVDS input as in: 

 

hsm2: alt_inbuf 

port map( 

i => hsm_rx_d_p(2), 

o => my_input)); 

 

I get the error message from Quartus II that O is not connected. 

 

Any thoughts/ideas?
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