HMP8156 Просмотр технического описания (PDF) - Intersil
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HMP8156 Datasheet PDF : 33 Pages
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HMP8156
BIT
NUMBER
FUNCTION
7
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 14. TIMING I/O REGISTER #1
SUB ADDRESS = 04H
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
0B
0B
0B
0B
0B
0 = Active low (low during horizontal sync)
0B
1 = Active high (high during horizontal sync)
0 = Active low (low during vertical sync)
0B
1 = Active high (high during vertical sync)
0 = Active low (low during odd fields)
0B
1 = Active high (high during odd fields)
TABLE 15. TIMING I/O REGISTER #2
BIT
NUMBER
FUNCTION
SUB ADDRESS = 05H
DESCRIPTION
7-5
Reserved
4
CLK Output Control 0 = CLK is an input
1 = CLK is an output
3
Aspect Ratio Mode This bit must be set to “0” during BT.656 input mode.
0 = Rectangular (BT.601) pixels
1 = Square pixels
2-0
Reserved
RESET
STATE
000B
0B
0B
00B
TABLE 16. AUXILIARY DATA ENABLE REGISTER
BIT
NUMBER
FUNCTION
SUB ADDRESS = 06H
DESCRIPTION
7-6
Closed Captioning 00 = Closed caption disabled
Enable
01 = Closed caption enabled for odd fields: line 21 for NTSC, line 18 for (M) PAL, or line
22 for (B, D, G, H, I, N, CN) PAL
10 = Closed caption enabled for even fields: line 284 for NTSC, line 281 for (M) PAL, or
line 335 for (B, D, G, H, I, N, CN) PAL
11 = Closed caption enabled for both odd and even fields
5-0
Reserved
RESET
STATE
00B
000000B
18
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