Chainin and Chainout Ports in Arria 10 Native Fixed Point DSP IP Core Not Supported for m18x18_full Operation Mode.

Description

When the Arria 10 Native Fixed Point DSP IP is configured to m18x18_full operation mode, the chainin and chainout ports are visible to users. However, these ports are disabled internally in m18x18_full operation mode.

If you connect the chainin and chainout ports when the Arria 10 Native Fixed Point DSP IP is configured to m18x18_full operation mode, there will be no data transfer in and out to the DSP core.

Resolution

Leave the chainin and chainout ports unconnected when the Arria 10 Native Fixed Point DSP IP is configured to m18x18_full operation mode. This issue will be fixed in a future version of the Quartus II software.