bt829bkrf ETC-unknow, bt829bkrf Datasheet - Page 100

• Manufacturer Part Number: bt829bkrf
• Description: Video Streamii Decoders
• Manufacturer: ETC-unknow

90
4.0 Control Register Definitions
0x0E—Chroma (V) Gain Register, Lower Byte (SAT_V_LO)
0x0E—Chroma (V) Gain Register, Lower Byte (SAT_V_LO)
This control register may be written to or read by the MPU at any time. Upon reset, it is initialized to 0xB4.
SAT_V_LO(0) is the LSB. SAT_V_MSB in the CONTROL register and SAT_V_LO concatenate to give a 9-bit
register (SAT_V). This register is used to add a gain adjustment to the V-component of the video signal. By ad-
justing the U and V color components of the video stream by the same amount, the saturation is adjusted. For nor-
mal saturation adjustment, the gain in both the color difference paths must be the same (i.e., the ratio between the
value in the U gain register and the value in the V gain register should be kept constant at the default power-up
ratio). When changing the saturation, if the SAT_V_MSB bit is altered, care must be taken to ensure that the other
bits in the CONTROL register are not affected.
SAT_V_LO
7
1
6
0
Decimal Value
511
510
181
180
128
1
0
.
.
.
.
.
.
5
1
4
1
D829BDSA
SAT_V_LO
Hex Value
3
0
0x0B5
0x0B4
0x1FE
0x080
0x001
0x000
0x1FF
.
.
.
.
.
.
2
1
VideoStream II Decoders
% of Original Signal
1
0
283.89%
283.33%
100.56%
100.00%
71.11%
0.56%
0.00%
.
.
.
.
.
.
Bt829B
0
0