HMP8112
TABLE 11. COLOR SATURATION ADJUST FACTOR
DESTINATION ADDRESS = 05
H
BIT
NUMBER
RESET
STATE
FUNCTION
DESCRIPTION
7 - 0
Color Saturation
Adjust Factor
This register sets the color saturation adjust factor. This value is multiplied by the chromi-
nance (CbCr) data and allows the data to be scaled from 0 to a factor of +1.96875. This 8-bit
number is a fractional number as shown below:
1001 1101
B
0
-1 -2 -3 -4 -5 -6 -7
2
2
2
2
2
2
2
2
The contrast factor is applied after the brightness.
TABLE 12. PHASE LOCKED LOOP CHROMINANCE SUBCARRIER TO BUS CLOCK FREQUENCY RATIO
DESTINATION ADDRESS = 06
H
BIT
NUMBER
RESET
STATE
FUNCTION
DESCRIPTION
7 - 0
Chroma PLL Ratio
These bits are used to program the ratio of the incoming video chrominance color sub- 1100 0001
carrier frequency to the BUS Clock used. This number serves as the reference frequency
of the chrominance PLL and must be very accurate. This is the lower byte of the ratio and
encompasses the following range:
B
-9 -10 -11 -12 -13 -14 -15 -16
2
2
2
2
2
2
2
2
The default value is for a CLK frequency of 27MHz and a color subcarrier of 3.579545
MHz.
TABLE 13. PHASE LOCKED LOOP CHROMINANCE SUBCARRIER TO BUS CLOCK FREQUENCY RATIO
DESTINATION ADDRESS = 07
H
BIT
NUMBER
RESET
STATE
FUNCTION
DESCRIPTION
15 - 8
Chroma PLL Ratio
These bits are used to program the ratio of the incoming video chrominance color sub- 1000 0111
carrier frequency to the BUS Clock used. This number serves as the reference frequency
of the chrominance PLL and must be very accurate. This is the upper byte of the ratio
and encompasses the following range:
B
-1 -2 -3 -4 -5 -6 -7 -8
2
2
2
2
2
2
2
2
TABLE 14. HORIZONTAL AGC START TIME REGISTER
DESTINATION ADDRESS = 08
H
BIT
NUMBER
RESET
STATE
FUNCTION
DESCRIPTION
This register provides a programmable delay for the HAGC pulse that control the sync
7 - 0
Horizontal AGC
0011 1111
B
Pulse Programmable tip AGC in the A/D converters. The start time of the HAGC pulse is set from the detection
Start Time
of horizontal sync in the video data. HAGC is programmable in CLK increments and has
a fixed 1 clock delay following the falling edge of horizontal sync. This is the lower byte
of the 10-bit word.
TABLE 15. HORIZONTAL AGC START TIME REGISTER
DESTINATION ADDRESS = 09
H
BIT
NUMBER
RESET
STATE
FUNCTION
Not Used
DESCRIPTION
15 - 10
Write Ignored, Read 0’s.
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HARRIS [ HARRIS CORPORATION ]
