HMP8156 Intersil Corporation, HMP8156 Datasheet - Page 17

• Manufacturer Part Number: HMP8156
• Description: Ntsc/pal Encoder
• Manufacturer: Intersil Corporation

NUMBER
NUMBER
BIT
BIT
7-5
2-1
4-0
4
3
0
7
6
5
Input Format
Gamma
Select
Reserved
Overlay Mixing
Mode
Input Resolution
Luminance
Processing
Composite Video
Limiting
SCH Phase
Mode
Reserved
FUNCTION
FUNCTION
000 = 16-bit 4:2:2 YCbCr
001 = 8-bit 4:2:2 YCbCr
010 = 8-bit parallel ITU-R BT.656
011 = 16-bit linear RGB
100 = 16-bit gamma-corrected RGB
101 = 24-bit linear RGB
110 = 24-bit gamma-corrected RGB
111 = Blue screen
These bits are ignored except during linear RGB input modes.
0 = 1 / 2.2
1 = 1 / 2.8
These bits must be set to “11” in 24-bit RGB input modes. Internal mixing should not be
selected in BT.656 input mode.
00 = No mixing
01 = Internal mixing
10 = External mixing
11 = Disable overlays
This bit must be set to “0” during BT.656 input mode.
0 = Full resolution (2x upscaling disabled)
1 = SIF resolution (2x upscaling enabled)
0 = None
1 = Y Lowpass filtering enabled
0 = None
1 = Lower limit of composite active video is about half the sync height
0 = Never reset SCH phase
1 = Reset SCH phase every 4 (NTSC) or 8 (PAL) fields
TABLE 13. VIDEO PROCESSING REGISTER
TABLE 12. INPUT FORMAT REGISTER
SUB ADDRESS = 02
SUB ADDRESS = 03
HMP8156
17
DESCRIPTION
DESCRIPTION
H
H
RESET
STATE
RESET
STATE
00000
000
11
0
0
0
1
0
1
B
B
B
B
B
B
B
B
B