Samsung S3C6400X User Manual page 591

CAMERA INTERFACE
※ Non-Interleaved burst length (Y burst length – YcbCr 4:2:0, YCbCr 4:2:2)
※ Non-Interleaved burst length (RGB burst length )
When YCbCr 4:2:2 interleave , burst size calculations are done to determine the wanted burst length. After finding
the wanted burst length.
The SFR fields are programmed as shown below,
Y : wanted Main burst length = 2 * Yburst1_Co, and wanted Remained burst length = 2 * Yburst2_Co.
Cb/Cr : wanted Main burst length = Yburst1_Co / 2 = Cburst1_Co, and wanted Remained burst length =
Yburst2_Co / 2 = Cburst2_Co
Example 1: Target image size: QCIF (horizontal Y width = 176 pixels. 1 pixel = 1 Byte)
If output format non-interleave YCbCr 4:2:2, 0 (1 word = 4 pixels)
Yword = 176 / 4 = 44 words, 44 % 8 = 4 → Y main burst = 8, Y remained burst = 4
Cword = 176 / 4 / 2 = 22 words, 22 % 4 = 2 → C main burst = 4, C remained burst = 2
If output format YCbCr 4:2:2 interleave (1 word = 2 pixel)
176 x (1 word / 2 pixles) = 88 words, 88 % 16 = 8 → Wanted main burst = 16, Wanted remained burst = 8
Wanted main burst = 16 = 2 * Yburst1 = 4 * Cburst1, Wanted remained burst = 8 = 2 * Yburst2 = 4 * Cburst2
Example 2: Target image size: VGA (horizontal Y width = 640 pixels. 1 pixel = 1 Byte)
If output format non-interleave YCbCr 4:2:2,0 (1 word = 4 pixel)
Yword = 640 / 4 = 160 word, 160 % 8 = 0 → Y main burst = 8, Y remained burst = 8
Cword = 640 / 4 / 2 = 80 word, 80 % 8 = 0 → C main burst = 8, C remained burst = 8
If output format Interleave 4:2:2 or RGB565 mode (1 word = 2 pixel)
Preliminary product information describe products that are in development,
20-26
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Main burst length = 4, 8, 16
Y
Remained burst length = 4, 8, 16
Main burst length = 2, 4, 8, 16
C
Remained burst length = 2, 4, 8, 16
Main burst length = 4, 8, 16
Y
Remained burst length = 4, 8, 16
C No meaning
S3C6400X RISC MICROPROCESSOR