BT848 ETC, BT848 Datasheet - Page 109
BT848
Manufacturer Part Number
BT848
Description
Single-Chip Video Capture for PCI
Manufacturer
ETC
Datasheet
1.BT848.pdf
(141 pages)
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Bt848/848A/849A
Single-Chip Video Capture for PCI
Chroma (U) Gain Register, Lower Byte
Memory Mapped Location 0x034 – (SAT_U_LO)
Upon reset it is initialized to 0xFE. SAT_U_LO(0) is the least significant bit. SAT_U_MSB in the CONTROL regis-
ter, and SAT_U_LO concatenate to give a 9-bit register (SAT_U).
Brooktree
Bits
[7:0]
Type
®
RW
Default
0xFE
SAT_U
Name
SAT_U_LO
Decimal Value
511
510
.
.
255
254
.
.
128
.
.
1
0
L848A_A
Description
This register is used to add a gain adjustment to the U component
of the video signal. By adjusting the U and V color components of
the video stream by the same incremental value, the saturation is
adjusted.
Hex Value
0x1FF
0x1FE
.
.
0x0FF
0x0FE*
.
.
0x080
.
.
0x001
0x000
Chroma (U) Gain Register, Lower Byte
C
ONTROL
% of Original Signal
201.18%
200.79%
.
.
100.39%
100.00%
.
.
50.39%
.
.
0.39%
0.00%
R
EGISTER
D
EFINITIONS
99
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