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參數資料
| 型號： | HMP8191 |
| 廠商： | Intersil Corporation |
| 英文描述： | NTSC/PAL Video Encoder |
| 中文描述： | NTSC / PAL視頻編碼器 |
| 文件頁數： | 15/32頁 |
| 文件大小： | 227K |
| 代理商： | HMP8191 |
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15
TABLE 16. TIMING I/O REGISTER #1
SUB ADDRESS = 04
H
BIT
NUMBER
FUNCTION
DESCRIPTION
RESET
STATE
7
BLANK
Timing Select
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 ne-
gates BLANK.
0
B
6
Reserved
0
B
5
BLANK Output Con-
trol
0 = BLANK is an input
1 = BLANK is an output
0
B
4
BLANK
Polarity
0 = Active low (low during blanking)
1 = Active high (high during blanking)
0
B
3
HSYNC and
VSYNC Output
Control
0 = HSYNC and VSYNC are inputs
1 = HSYNC and VSYNC are outputs
0
B
2
HSYNC
Polarity
0 = Active low (low during horizontal sync)
1 = Active high (high during horizontal sync)
0
B
1
VSYNC
Polarity
0 = Active low (low during vertical sync)
1 = Active high (high during vertical sync)
0
B
0
FIELD
Polarity
0 = Active low (low during odd fields)
1 = Active high (high during odd fields)
0
B
TABLE 17. TIMING I/O REGISTER #2
SUB ADDRESS = 05
H
BIT
NUMBER
FUNCTION
DESCRIPTION
RESET
STATE
7-6
Reserved
00
B
5
CLK Polarity Control
0 = Inputs are sampled when CLK is low (see Table 2).
1 = Inputs are sampled when CLK is high.
0
B
4
CLK Output Control
0 = CLK is an input
1 = CLK is an output
0
B
3
Aspect Ratio Mode
This bit must be set to “0” during BT.656 input mode.
0 = Rectangular (BT.601) pixels
1 = Square pixels
0
B
2
Reserved
0
B
1-0
Subcarrier PHINC
Select
Selects the source of the color subcarrier NCO phase increment value.
00 = Internal (fixed) data.
01 = Reserved
10 = BT.656 RTCI ancillary data
11 = I
2
C interface PHINC register
00
B
HMP8190, HMP8191
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