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Ixiasoft
Visible to Intel only — GUID: nik1409855401217
Ixiasoft
4.5.2. Serial Digital Interface Transceiver Datapath
Transmitter Datapath
The transmitter datapath in the HD-SDI configuration with a 10-bit wide FPGA fabric-transceiver interface consists of the transmitter phase compensation FIFO and the 10:1 serializer. In HD-SDI and 3G-SDI configurations with 20-bit wide FPGA fabric-transceiver interface, the transmitter datapath also includes the byte serializer.
Receiver Datapath
In the 10-bit channel width SDI configuration, the receiver datapath consists of the clock recovery unit (CRU), 1:10 deserializer, word aligner in bit-slip mode, and receiver phase compensation FIFO. In the 20-bit channel width SDI configuration, the receiver datapath also includes the byte deserializer.
Receiver Word Alignment and Framing
In SDI systems, the word aligner in the receiver datapath is not useful because the word alignment and framing happen after descrambling. Altera recommends that you drive the rx_bitslip signal of the PHY IP core low to avoid having the word aligner insert bits in the received data stream.