Article ID: 000085213 Content Type: Troubleshooting Last Reviewed: 09/26/2011

SDI Audio Embed MegaCore Function Samples Wrong Audio Data

Environment

    Quartus® II Subscription Edition
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Critical Issue

Description

The SDI Audio Embed MegaCore Function supports both synchronous and asynchronous mode, but the embed audio IP core is internally preset as synchronous mode only. If you connect the aud_clk signal for the SDI Embed Audio IP core to any frequency other than 3.072 MHz, the core may sample the audio data wrongly and the oscilloscope detects the audio data as mute.

This issue affects all SDI Audio Embed IP core configurations.

The design may sample the audio data wrongly.

Resolution

To enable the asynchronous mode, open the generated <variation_name>.v file and add the following line:

.G_AUDEMB_INPUT_ASYNC (1)

To enable back to synchronous mode, open the generated <variation_name>.v file and change (1) to (0):

.G_AUDEMB_INPUT_ASYNC (0)

This issue has been fixed in version 11.0sp2 of the SDI Audio Embed MegaCore function.

Related Products

This article applies to 1 products

Intel® Programmable Devices

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