HMP8170 Datasheet, PDF (16/33 Pages) Intersil Corporation – NTSC/PAL Video Encoder

HMP8170, HMP8171, HMP8172, HMP8173
BIT
NUMBER
7-5
FUNCTION
Input Format
4 - 0 Reserved
BIT
NUMBER
7
6
5
4
FUNCTION
Luminance
Processing
Composite Video
Limiting
SCH Phase
Mode
RGB / YUV
Setup Select
3
RGB Output
Pins Select
2-0
Reserved
BIT
NUMBER
7
FUNCTION
BLANK
Timing Select
6
Reserved
5
BLANK Output
Control
4
BLANK
Polarity
3
HSYNC and
VSYNC Output
Control
2
HSYNC
Polarity
1
VSYNC
Polarity
0
FIELD
Polarity
TABLE 16. INPUT FORMAT REGISTER
SUB ADDRESS = 02_H
000 = 16-bit 4:2:2 YCbCr
001 = 8-bit 4:2:2 YCbCr
010 = 8-bit BT.656
011 = Reserved
100 = Reserved
101 = Reserved
110 = Reserved
111 = Reserved
DESCRIPTION
RESET
STATE
000_B
00000_B
TABLE 17. VIDEO PROCESSING REGISTER
SUB ADDRESS = 03_H
DESCRIPTION
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
This bits specifies the blanking pedestal on the analog RGB and YUV outputs during active
video. Typically, this bit should be a “1” during (M) NTSC and (M, N) PAL operation. Otherwise,
it should be a “0”. This bit does not affect the analog composite or Y/C outputs.
0 = 0 IRE
1 = 7.5 IRE
This bit configures on what pins the analog RGB video is output.
0 = HMP8156 compatible
1 = SCART compatible
RESET
STATE
1_B
0_B
1_B
0_B
0_B
000_B
TABLE 18. TIMING I/O REGISTER #1
SUB ADDRESS = 04_H
DESCRIPTION
This bit is ignored unless BLANK is configured to be an output.
0 = Data for the first active pixel of the scan line must arrive the CLK cycle after the encoder
negates BLANK.
1 = Data for the first active pixel of the scan line must arrive immediately after the encoder
negates BLANK.
0 = BLANK is an input
1 = BLANK is an output
0 = Active low (low during blanking)
1 = Active high (high during blanking)
0 = HSYNC and VSYNC are inputs
1 = HSYNC and VSYNC are outputs
RESET
STATE
0_B
0_B
0_B
0_B
0_B
0 = Active low (low during horizontal sync)
0_B
1 = Active high (high during horizontal sync)
0 = Active low (low during vertical sync)
0_B
1 = Active high (high during vertical sync)
0 = Active low (low during odd fields)
0_B
1 = Active high (high during odd fields)
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