SNLA267A March 2019 – June 2019 DS90UB953-Q1 , DS90UB954-Q1 , DS90UB960-Q1
Pattern Generation is when the engineer uses an internal block of the 954 or 953 to generate CSI data. The generation of this data is used to check links in the system without directly using the CSI data gathered by the image sensor. As soon as the image sensor is used for checking CSI data, multiple links of the system are used, which makes identifying problems with a specific link problematic.
As a result, using the 954 pattern generation function and forwarding the data to the ISP will help identify whether or not there are problems with the CSI data traveling across the link between the DES and ISP. If the patterns generated match the output of the ISP, the link between the DES and ISP is healthy. The process can then be repeated with the pattern generation on the 953, which determines the health of the SER and DES link, and finally with the CSI data of the image sensor that determines the health of the SER and Image Sensor Link.
While this process is helpful in identifying which links are healthy, minimal insight is gained regarding the root problem of the link.