2.4.2. Creating Accurate IBIS Models
The IBIS file generated by the Intel® Quartus® Prime software contains models of both input and output termination, and is supported for IBIS model versions of 4.2 and later. Arria® V , Cyclone® V , and Stratix® V device families allow the use of bidirectional I/O with dynamic on-chip termination (OCT).
Dynamic OCT is used where a signal uses a series on-chip termination during output operation and a parallel on-chip termination during input operation. Typically this is used in Altera External Memory Interface IP.
The Intel® Quartus® Prime IBIS dynamic OCT IBIS model names end in g50c_r50c. For example : sstl15i_ctnio_g50c_r50c.
When the buffer is assigned as an output, use the series termination r50c.
When the buffer is assigned as an input, use the parallel termination g50c.
Did you find the information on this page useful?