HMP8112CN HARRIS [Harris Corporation], HMP8112CN Datasheet - Page 16

• Manufacturer Part Number: HMP8112CN
• Description: NTSC/PAL Video Decoder
• Manufacturer: HARRIS [Harris Corporation]

NUMBER
NUMBER
NUMBER
NUMBER
NUMBER
15 - 10
15 - 8
7 - 0
7 - 0
7 - 0
BIT
BIT
BIT
BIT
BIT
Color Saturation
Adjust Factor
TABLE 12. PHASE LOCKED LOOP CHROMINANCE SUBCARRIER TO BUS CLOCK FREQUENCY RATIO
Chroma PLL Ratio
TABLE 13. PHASE LOCKED LOOP CHROMINANCE SUBCARRIER TO BUS CLOCK FREQUENCY RATIO
Chroma PLL Ratio
Horizontal AGC
Pulse Programmable
Start Time
Not Used
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
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:
2
The contrast factor is applied after the brightness.
These bits are used to program the ratio of the incoming video chrominance color sub-
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:
2
The default value is for a CLK frequency of 27MHz and a color subcarrier of 3.579545
MHz.
These bits are used to program the ratio of the incoming video chrominance color sub-
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:
2
This register provides a programmable delay for the HAGC pulse that control the sync
tip AGC in the A/D converters. The start time of the HAGC pulse is set from the detection
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.
Write Ignored, Read 0’s.
0
-9
-1
2
2
2
TABLE 14. HORIZONTAL AGC START TIME REGISTER
TABLE 15. HORIZONTAL AGC START TIME REGISTER
-1
-10
-2
TABLE 11. COLOR SATURATION ADJUST FACTOR
2
2
-2
2
-3
-11
2
2
-3
-4
2
2
-12
2
-4
-5
DESTINATION ADDRESS = 05
DESTINATION ADDRESS = 06
DESTINATION ADDRESS = 07
DESTINATION ADDRESS = 08
DESTINATION ADDRESS = 09
2
2
2
-5
-13
-6
2
2
-6
2
-7
-14
2
HMP8112
2
-7
-8
2
-15
16
2
-16
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
H
H
H
H
H
1001 1101
1100 0001
1000 0111
0011 1111
XXXX XX
RESET
RESET
RESET
RESET
RESET
STATE
STATE
STATE
STATE
STATE
B
B
B
B