5.4.4. SD 20-Bit Interface for Dual/Triple Rate
For a common SD interface, the serial data format is 10 bits wide, whereas for HD or 3G, the data format is 20 bits wide, divided into two parallel 10-bit datastreams (known as Y and C).
- The receiver can extract the data and align them in 20-bit width
- The transmitter can accept SD data in 20-bit width and retransmit them successfully
The timing diagrams below show a comparison of data arrangement between 10-bit and 20-bit interface.
- The upper 10 bits of rx_dataout are insignificant data.
- The lower 10 bits of rx_dataout are Luma (Y) and chroma (Cb, Cr) channels (interleaved).
- The 1H 4L 1H 5L cadence of rx_dataout_valid repeats indefinitely (ideal).
- The upper 10 bits of rx_dataout are Luma (Y) channel and the lower 10 bits are Chroma (Cb, Cr) channel.
- The 1H 10L cadence of rx_dataout_valid repeats indefinitely (ideal).