saa6703h NXP Semiconductors, saa6703h Datasheet - Page 57
saa6703h
Manufacturer Part Number
saa6703h
Description
Xga Dual Input Flat Panel Controller.
Manufacturer
NXP Semiconductors
Datasheet
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Philips Semiconductors
7.11.3.3
For exact measurements within the incoming video
stream, two reference pixel positions can be defined with
ref_row_0, ref_col_0 and ref_row_1, ref_col_1. The
R, G and B components of this pixel are sampled and
available at ref_pixel_red_0/1, ref_pixel_green_0/1 and
ref_pixel_blue_0/1. The reference pixel colour values can
be used for fine tuning the external PLL in frequency and
phase and for colour gain adjustment.
Three submodes are available to output the maximum
value, the minimum value or the mean value at the
dedicated position (see Table 36).
Table 36 Mode 10 (pixel measurement)
2004 Apr 01
Input values
aa_submode[1:0]
aa_cycles[1:0]
ref_col_0[10:0]
ref_row_0[11:0]
ref_col_1[10:0]
ref_row_1[11:0]
Output values
ref_pixel_red_0[7:0]
ref_pixel_green_0[7:0] green channel colour value at position 0
ref_pixel_blue_0[7:0]
ref_pixel_red_1[7:0]
ref_pixel_green_1[7:0] green channel colour value at position 1
ref_pixel_blue_1[7:0]
XGA dual input flat panel controller
BIT
Pixel measurement
submode
measurement interval
pixel position 0 column
pixel position 0 row
pixel position 1 column
pixel position 1 row
red channel colour value at position 0
blue channel colour value at position 0
red channel colour value at position 1
blue channel colour value at position 1
00: maximum of pixel at dedicated positions
01: minimum of pixel at dedicated positions
10: mean value of pixel at dedicated positions
11: mean value of pixel at dedicated positions
00: 1 frame
01: 4 frames
10: 8 frames
11: 16 frames
57
To simplify the measurements, the values can be taken as
a single snapshot representing the momentary value of the
pixel at the reference position or they can be build up over
several frames, which is activated by programming the
number of frames to bits aa_cycles.
DESCRIPTION
Product specification
SAA6703H
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