參數(shù)資料
型號(hào)： TVP5150AM1ZQCR
廠商： TEXAS INSTRUMENTS INC
元件分類： 顏色信號(hào)轉(zhuǎn)換
英文描述： COLOR SIGNAL DECODER, PBGA48
封裝： GREEN, PLASTIC, BGA-48
文件頁(yè)數(shù)： 60/88頁(yè)
文件大?。?/td> 997K
代理商： TVP5150AM1ZQCR
www.ti.com
SLES209D – NOVEMBER 2007 – REVISED SEPTEMBER 2010
3.21.59 Teletext Filter and Mask Registers
Address
B1h–BAh
Default
00h
Address
7
6
5
4
3
2
1
0
B1h
Filter 1 mask 1
Filter 1 pattern 1
B2h
Filter 1 mask 2
Filter 1 pattern 2
B3h
Filter 1 mask 3
Filter 1 pattern 3
B4h
Filter 1 mask 4
Filter 1 pattern 4
B5h
Filter 1 mask 5
Filter 1 pattern 5
B6h
Filter 2 mask 1
Filter 2 pattern 1
B7h
Filter 2 mask 2
Filter 2 pattern 2
B8h
Filter 2 mask 3
Filter 2 pattern 3
B9h
Filter 2 mask 4
Filter 2 pattern 4
BAh
Filter 2 mask 5
Filter 2 pattern 5
For an NABTS system, the packet prefix consists of five bytes. Each byte contains four data bits (D[3:0])
interlaced with four Hamming protection bits (H[3:0]):
7
6
5
4
3
2
1
0
D[3]
H[3]
D[2]
H[2]
D[1]
H[1]
D[0]
H[0]
Only the data portion D[3:0] from each byte is applied to a teletext filter function with the corresponding
pattern bits P[3:0] and mask bits M[3:0]. Hamming protection bits are ignored by the filter.
For a WST system (PAL or NTSC), the packet prefix consists of two bytes so that two patterns are used.
Patterns 3, 4, and 5 are ignored.
The mask bits enable filtering using the corresponding bit in the pattern register. For example, a 1 in the
LSB of mask 1 means that the filter module must compare the LSB of nibble 1 in the pattern register to
the first data bit on the transaction. If these match, a true result is returned. A 0 in a bit of mask 1 means
that the filter module must ignore that data bit of the transaction. If all zeros are programmed in the mask
bits, the filter matches all patterns returning a true result (default 00h).
Pattern and mask for each byte and filter are referred as <1,2><P,M><1,2,3,4,5>, where:
<1,2> identifies the filter 1 or 2
<P,M> identifies the pattern or mask
<1,2,3,4,5> identifies the byte number
Copyright 2007–2010, Texas Instruments Incorporated
Functional Description
63
Product Folder Link(s): TVP5150AM1
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