SNLA308A April 2019 – October 2020 DS90UB941AS-Q1 , DS90UH941AS-Q1
By default, asymmetric splitting generates each resultant image at half the frequency of the superframe image. Options exist to use external reference clocks or M/N divided versions of the DPHY Lane clock for each resultant image. To avoid jitter clocks, TI recommends programming M to a value of 1. To prevent short pulse-widths to the Dual-Image buffer memories, the splitter mode dividers must have N greater than M. Additionally, the 1 divided by the ratio M/N must be an integer. The default settings for M/N provide a half clock frequency normally required for splitting symmetric video. The use of the half ratio results in an image with significant horizontal blanking; increasing the N value reduces the horizontal blanking. Note that this does not affect the vertical blanking.