Article ID: 000086216 Content Type: Troubleshooting Last Reviewed: 10/21/2011

The LOW LATENCY PHY megafunction in PMA Direct mode can generate multiple channels in the Transceiver Toolkit, but only the first channel is functional

Environment

  • Quartus® II Subscription Edition
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    Critical Issue

    Description

    In the Transceiver Toolkit, if you use a LOW LATENCY PHY megafunction in PMA Direct mode and have more than one channel, the channels and links that are automatically generated function only for the first channel.

    Resolution

    If you want to create more than one new transmitter channel, receiver channel, or transceiver link in PMA Direct mode, you must do so manually. To correctly address the transceiver settings, ensure that the generator and checker for the LOW LATENCY PHY megafunction is multiplied by four.In PMA Direct mode, when the phase compensation FIFO mode is set to None, the addressing scheme is 0, 4, 8, 12, and so forth; rather than the typical 0, 1, 2, 3, and so forth that is used in other modes. For example, if generator2 is connected to channel tx_parallel_data_2 with the LOW LATENCY PHY megafunction, you must set the channel tx_parallel_data_2 to channel tx_parallel_data_8 (channel 2 multiplied by four) for the transceiver settings to communicate on the correct channel.

    Related Products

    This article applies to 1 products

    Intel® Programmable Devices