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(yè)數(shù)： 13/48頁(yè)
文件大小： 233K
代理商： TMC2376
TMC2376
PRODUCT SPECIFICATION
13
P
Input Vertical Count Low (C)
7
IVC7
Input Vertical Count High (D)
7
0
Range:
{0:[1022]}.
Vertical Scaling Coefficient (E)
7
0
Vertical Scaling Coefficient (F)
7
0
6
5
4
3
2
1
0
IVC6
IVC5
IVC4
IVC3
IVC2
IVC1
IVC0
6
0
5
0
4
0
3
0
2
0
1
0
IVC9
IVC8
Reg
D, C
Bit#
1-0, 7-0
Bit Name
IVC9-0
Description
Input vertical line count bits [9:0] (read only).
Terminal
count of the number of incoming lines per frame. IVC is
used to determine the incoming vertical refresh frequency
for auto selection of the incoming video format.
6
0
5
4
3
2
1
0
VSC5
VSC4
VSC3
VSC2
VSC1
VSC0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
Reg
E
Bit#
5-0
Bit Name
VSC5-0
Description
Vertical scaling coefficient bits [5:0], m.
The number of
lines that must be removed modulo 64 to down-sample the
incoming frame to the number of active lines in the
outgoing TV frame. Vertical scaling factor = (1 - m/64).
Load .
Writing to register F activates register E data.
F
-
-
Range:
{0:[{(1 - (2 * Input Lines Stored(Offset 0x6,0x7) /(Input
Vertical Count(Offset 0xC,0xD) - Input Vertical Blank))) *
64:[32]}]}.
In the above range, the vertical scaling coefficient, n is lim-
ited by the constraint that the scaling factor cannot reduce the
number of input lines below the number of lines programmed
to be stored. For example, 500 input lines cannot be scaled by
1/2 if the number of stored lines programmed is 300. How-
ever, if the number of stored lines, ILS is lowered to 200,
then 200 of the 250 lines will be stored although the last 50
will be discarded.
Example:
480 line VGA image mapped to 400 line image.
VSC = (1-(400/480))*64 = 10.6667
Use 11 for the Coefficient value.
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