The receiving device starts the initial lane alignment process by deasserting the
SYNC signal. When a logic low state is detected on the
SYNC input, the ADC starts transmitting comma characters (K28.5) to establish the code group synchronization, as shown in
Figure 7-39. When synchronization is completed, the receiving device reasserts the
SYNC signal and the ADC starts the initial lane alignment sequence with the next local multi-frame clock (LMFC) boundary. The ADC transmits four multi-frames, each containing K frame (K is SPI programmable). EAch of the multi-frames contains the frame start and frame end symbols. The second multi-frame also contains the JESD204B link configuration data.