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參數(shù)資料
| 型號(hào)： | TMC2376 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | PC-to-TV Video Standards Converter(PC到TV視頻標(biāo)準(zhǔn)變換器) |
| 中文描述： | PC到電視視頻標(biāo)準(zhǔn)轉(zhuǎn)換器（電腦到電視視頻標(biāo)準(zhǔn)變換器） |
| 文件頁數(shù)： | 10/48頁 |
| 文件大小： | 233K |
| 代理商： | TMC2376 |
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TMC2376
PRODUCT SPECIFICATION
10
P
Control Registers Definitions
In the following definitions, range is defined as:
{min value:[max value]}.
Input Horizontal Offset Register Low (0)
7
IHO7
Input Horizontal Offset Register High (1)
7
0
Range:
{0 : [(Input Horizontal Samples(0x8,0x9) + 1) - Input Horizontal Active Width(0x4,0x5)]}.
6
5
4
3
2
1
0
IHO6
IHO5
IHO4
IHO3
IHO2
IHO1
IHO0
6
0
5
0
4
0
3
0
2
0
1
0
IHO9
IHO8
Reg
1, 0
Bit#
1-0, 7-0
Bit Name
IHO9-0
Description
Input horizontal offset bits [9-0].
Horizontal
displacement of the image in pixels from the leading edge
of horizontal sync. Programming a value greater than IHS
is illegal, preventing any pixels from being written into the
Frame Store.
Due to pipeline delays within the TMC2376, a bias of 42
must be added to the delay from the leading edge of sync to
the start of active video expressed in A/D clock sampling
ticks. For example, with a 40 MHz sampling clock and a
56.29 kHz line rate, there are 711 samples per line. Typical
blanking period is 20% from the leading edge of horizontal
sync to the start of active video, leading to a delay of 142
pixels. Adding 42 pixels, the correct OHO value is 184.
Input Vertical Offset Low (2)
7
IVO7
Input Vertical Offset High (3)
7
0
Range:
{0 : [Input Vertical Count (0xC,0xD) – Input Lines Stored (0x6,0x7)]}.
Constraining the upper limit of the range prevents IVO from forcing the last line of an image with height ILS beyond the range of
IVC.
Note:
1. Input Vertical Count (0xC,0xD) must be read to obtain the register value.
6
5
4
3
2
1
0
IVO6
IVO5
IVO4
IVO3
IVO2
IVO1
IVO0
6
0
5
0
4
0
3
0
2
0
1
0
IVO9
IVO8
Reg
3, 2
Bit#
1-0, 7-0
Bit Name
IVO9-0
Description
Input vertical offset bits [9:0].
Vertical displacement of
the image in lines from the leading edge of vertical sync
plus a one line bias.
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