ASX340AT Datasheet, PDF (47/75 Pages) ON Semiconductor – Color CMOS NTSC/PAL Digital Image

ASX340CS: 1/4-Inch Color CMOS NTSC/PAL Digital Image Sensor
Overlay Character Generator
Character Generator
The character generator can be seen as the fifth top layer, but instead of getting the
source from RLE data in the memory buffers, it has 16 predefined characters stored in
ROM.
All the characters are 1-bit depth color and are sharing the same YCbCr look up table.
Figure 27: Example of Character Descriptor 0 Stored in ROM
ROM 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0x00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0x02 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0x04 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0
0x06 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0
0x08 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0
0x0a 0 0 0 1 1 1 1 0 0 1 1 1 1 0 0 0
0x0c 0 0 0 1 1 1 0 0 0 0 1 1 1 1 0 0
0x0e 0 0 1 1 1 1 0 0 0 0 0 1 1 1 0 0
0x10 0 0 1 1 1 0 0 0 0 0 0 1 1 1 0 0
0x12 0 0 1 1 1 0 0 0 0 0 0 1 1 1 1 0
0x14 0 1 1 1 1 0 0 0 0 0 0 0 1 1 1 0
0x16 0 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0
0x18 0 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0
0x1a 0 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0
0x1c 0 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0
0x1e 0 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0
0x20 0 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0
0x22 0 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0
0x24 0 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0
0x26 0 1 1 1 0 0 0 0 0 0 0 0 1 1 1 0
0x28 0 0 1 1 1 0 0 0 0 0 0 0 1 1 1 0
0x2a 0 0 1 1 1 0 0 0 0 0 0 1 1 1 1 0
0x2c 0 0 1 1 1 0 0 0 0 0 0 1 1 1 0 0
0x2e 0 0 1 1 1 1 0 0 0 0 0 1 1 1 0 0
0x30 0 0 0 1 1 1 0 0 0 0 1 1 1 0 0 0
0x32 0 0 0 1 1 1 1 0 0 1 1 1 1 0 0 0
0x34 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0
0x36 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0
0x38 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0
0x3a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0x3c 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0x3e 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
…
It can show a row of up to 22 characters of 16 x 32 pixels resolution (32 x 32 pixels when
blended with the BT 656 data).
ASX340AT/D Rev. H, 8/15 EN
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