>MegaCore Function Variation File Ports</h2><TABLE border=1 cellpadding=2 cellspacing=0 width="75%"><TR align="left"><TH align="left"><B>Name</B></TH><TH align="left"><B>Direction</B></TH><TH align="left"><B>Width</B></TH></TR><TR><TD>ff_tx_data</TD><TD>INPUT</TD><TD>8</TD></TR><TR><TD>ff_tx_eop</TD><TD>INPUT</TD><TD>1</TD></TR><TR><TD>ff_tx_err</TD><TD>INPUT</TD><TD>1</TD></TR><TR><TD>ff_tx_rdy</TD><TD>OUTPUT</TD><TD>1</TD></TR><TR><TD>ff_tx_sop</TD><TD>INPUT</TD><TD>1</TD></TR><TR><TD>ff_tx_wren</TD><TD>I