HDMI Intel® FPGA IP User Guide

ID 683798
Date 4/22/2022
Public

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4.3.1.4. Multirate Reconfig Controller (RX)

The Multirate Reconfig Controller implements rate detection circuitry with the HDMI PLL to drive the RX transceiver to operate at any arbitrary link rates ranging from 250 Mbps to 6,000 Mbps. Link rate of 6,000 Mbps is not the absolute maximum but the intention is to support HDMI 2.0b link rate.

The Multirate Reconfig Controller performs rate detection on the HDMI PLL arbitrary reference clock, which is also the TMDS clock, to determine the clock frequency band. Based on the detected clock frequency band, the circuitry dynamically reconfigures the HDMI PLL and transceiver settings to accommodate for the link rate change.

Figure 11. Multirate Reconfiguration Sequence FlowThis figure illustrates the multirate reconfiguration sequence flow of the controller when it receives input data stream and reference clock frequency, or when the transceiver is unlocked.

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