HMP8112CN HARRIS [Harris Corporation], HMP8112CN Datasheet - Page 14

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

NUMBER
NUMBER
7 - 6
2 - 1
6 - 0
BIT
BIT
5
4
3
0
7
Video Input
Standard
Color Trap Filter
Disable
Chrominance Low
Pass Filter Disable
Automatic Color
Gain Control
A/D Converter
Multiplexor Selects
Not Used
IRE Setup
Cancellation Control
Luminance
Brightness Control
FUNCTION
FUNCTION
These bits select the video input standard.
00 = PAL B, G, H, I, N; 4.43MHz subcarrier; 50fps; 625 lines/frame;
01 = PAL M; 3.58MHz subcarrier; 60fps; 525 lines/frame;
10 = Special PAL N; 3.58MHz subcarrier; 50fps; 625 lines/frame;
11 = NTSC M; 3.58MHz subcarrier; 60fps; 525 lines/frame (default);
This bit enables the color subcarrier trap filter. The filter removes the color subcarrier infor-
mation from the luminance channel. The filter should be enabled for PAL Standard systems.
0 = Enabled
1 = Disabled (default)
This bit enables the chrominance low pass filter. This filter band limits the chrominance
channel to remove luminance artifacts. This filter should be enabled for PAL Standard
systems.
0 = Enabled
1 = Disabled (default)
This bit enables the color AGC function. When this bit is set the color AGC will automati-
cally adjust the chrominance channel gain, to drive the color reference burst to a nominal
saturation must be adjusted to obtain nominal CrCb values.
0 = Disabled
1 = Enabled (default)
These bits control the A/D input select multiplexers and whether S-Video is being input as
follows: MUXSEL1,0 =
0, 0 = Select Composite Video Input #0, set decoder for Composite
1, 0 = Select Composite Video Input #1, set decoder for Composite
0, 1 = Select Composite Video Input #2, set decoder for Composite
1, 1 = Select S-Video Y and C Inputs
Write Ignored, Read 0’s
This bit enables the black setup cancelation circuit for NTSC sources. When this bit is set
a value of 73 is used to strip the sync information from the video signal. When this bit is
cleared a value of 64 is used to strip the sync information.
0 = subtract 64 from the luminance signal
1 = subtract 73 from the luminance signal
These bits control the brightness adjustment to the luminance channel. The brightness
adjustment value is a number that ranges from +63 to -64. This register is in the two’s
complement format, where bit 6 is the sign bit.
20 IRE’s. When this bit is cleared the color AGC gain factor is set to 1.0 and the color
TABLE 7. LUMINANCE BRIGHTNESS CONTROL
TABLE 6. VIDEO INPUT CONTROL
DESTINATION ADDRESS = 00
DESTINATION ADDRESS = 01
HMP8112
14
DESCRIPTION
DESCRIPTION
H
H
000 0000
RESET
STATE
RESET
STATE
11
00
X
1
1
1
1
B
B
B
B
B
B
B
B