ZHCSEN6D October 2014 – February 2022 DS90UH948-Q1
PRODUCTION DATA
In forward channel SPI operation, the SPI Controller located at the serializer generates the SPI clock (SPLK), Controller out / Peripheral in data (PICO), and active low Peripheral select (CS). The serializer oversamples the SPI signals directly using the video pixel clock. The three sampled values for SPLK, PICO, and CS are each sent on data bits in the forward channel frame. At the deserializer, the SPI signals are regenerated using the pixel clock. To preserve setup and hold time, the deserializer holds POCI data while the SPLK signal is high. The deserializer also delays SPLK by one pixel clock relative to the PICO data, increasing setup by one pixel clock.