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RM0351 Digital camera interface (DCMI)
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20.5 Data format description
20.5.1 Data formats
Three types of data are supported:
● 8-bit progressive video: either monochrome or raw Bayer format
● YCbCr 4:2:2 progressive video
● RGB565 progressive video. A pixel coded in 16 bits (5 bits for blue, 5 bits for red, 6 bits
for green) takes two clock cycles to be transferred.
Compressed data: JPEG
For B&W, YCbCr or RGB data, the maximum input size is 2048 × 2048 pixels. No limit in
JPEG compressed mode.
For monochrome, RGB & YCbCr, the frame buffer is stored in raster mode. 32-bit words are
used. Only the little endian format is supported.
Figure 154.Pixel raster scan order
20.5.2 Monochrome format
Characteristics:
● Raster format
● 8 bits per pixel
Table 132 shows how the data are stored.
0IXELRASTER
SCANORDER
INCREASING
ADDRESSES
7ORD
7ORD
7ORD
0IXELROW
0IXELROWNn
AI
Table 132.Data storage in monochrome progressive video format
Byte address 31:24 23:16 15:8 7:0
0 n + 3 n + 2 n + 1 n
4 n + 7 n + 6 n + 5 n + 4
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