SWRS295A December 2022 – March 2024 AWRL6432
PRODUCTION DATA
The samples are sent one channel by one channel as shown in the diagram above. All the 12-bits of one channel are sent on 4 data lanes in 3 DDR_CLK edges, followed by next RX channel.
The frame clock (FRM_CLK) spans 12 DDR_CLK edges and 48 bits are sent in 1 FRM_CLK
The FRM_CLK can have gaps in between. This is required as the interface rate is greater than the incoming rate
DDR_CLK is continuous.
DDR_CLK is generated from 400MHz ADC CLK (one of the ADC CLKs) - selected for the DFE. It is the same 400MHz clock selected for DFE.
New sample always starts at the rise edge of the DDR_CLK
The FRM_CLK is valid for the entire data bit and is meets the Tsu/Th wrt DDR_CLK.