The data path of YCbCr/BT.656 modes is shown in the thicker lines in Figure 12-1196 (that is A1). Data path
A2 is applicable to raw data mode only.
- The pixel clock (CCDC_PCLK) latches data.
- Pixel clock polarity can be
either rising or falling edge and is set in VPFE clock control register
(VPFE_CONFIG[0] PCLK_INV bit).
- The VPFE_SYNMODE[6] DATAPOL bit
affects the data representation.
- The VPFE_CCDCFG[4] YCINSWP bit
can be used to swap the upper and lower portions of the 16-bit YCbCr data bus.
- In 16-bit YCbCr mode,
this swap bit determines which part of the bus luma and chroma samples
occupy respectively.
- In 8-bit mode, this swap
bit determines which part of the bus is the effective 8-bit input.
- The VPFE_CCDCFG[13] MSBINVI bit
can be used to invert the MSB of the chroma signal.