STV3550B STMicroelectronics, STV3550B Datasheet - Page 50
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STV3550B
Manufacturer Part Number
STV3550B
Description
Manufacturer
STMicroelectronics
Datasheet
1.STV3550B.pdf
(145 pages)
Specifications of STV3550B
Operating Temperature (min)
0C
Operating Temperature (max)
70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / Rohs Status
Compliant
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31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Pixel 4
Pixel 8
Each OSD specification after the first one can either use the same color palette as the
previous OSD region, or a new one can be defined. If a new palette is defined in the
SDRAM, the following bits must be modified in the header:
●
●
●
●
CLUT outputs are 32-bits; 8-bits for R, 8-bits for G, 8-bits for B, plus 8 bits for transparency
control (or mixing factor).
OSD bitmap
The bitmap defines the OSD pixels, from left to right, in order and within lines, and follows
the lines from top to bottom. The first line of a bitmap is always a top line, and the last line is
always a bottom line. The number of bits per pixel is 8. The value for each pixel gives the line
of the palette or the address in the CLUT, which defines the color for the pixel.
The bitmap block is subdivided in two field blocks, the top field block and the bottom field
block. These two blocks always contain the same number of pixels (in both Interlaced and
Progressive mode). Each field block (top or bottom) defines one field of one region and each
block must be contiguous, aligned on a 32-bit boundary in the SDRAM.
Two pointers, defined in the header, give the first bitmap pixel address in each field block.
The bottom field block can be merged with the top field block (line-based format).
NP
Palettep[31:0]
NCL[7:0]
CLUTAdd[7:0]
must be set
gives the number of colors to be loaded in the OSD CLUT
will indicate the new address of the first byte to be loaded
gives the OSD CLUT address where the first color will be loaded
+1 Pixel
+1 Pixel
+1 Pixel
+1 Pixel
Pixel 1
Pixel 5
STV3550
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