參數(shù)資料
型號： TVP5160PNPG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 顏色信號轉(zhuǎn)換
英文描述： COLOR SIGNAL DECODER, PQFP128
封裝： PLASTIC, HTQFP-128
文件頁數(shù)： 104/119頁
文件大小： 1347K
代理商： TVP5160PNPG4
Internal Control Registers
75
February 2005 Revised April 2006
SLES135A
4.1.104 VDP TTX Filter and Mask
Subaddress
B1h
B2h
B3h
B4h
B5h
B6h
B7h
B8h
B9h
BAh
Default
00h
Subaddress
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 4 data bits (D[3:0])
interlaced with 4 Hamming protection bits (H[3:0]):
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 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 corresponding pattern
bits P[3:0] and mask bits M[3:0]. The filter ignores hamming protection bits.
For a WST system (PAL or NTSC), the packet prefix consists of two bytes. The two bytes contain three bits
of magazine number (M[2:0]) and five bits of row address (R[4:0]), interlaced with eight Hamming protection
bits H[7:0]:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R[0]
H[3]
M[2]
H[2]
M[1]
H[1]
M[0]
H[0]
R[4]
H[7]
R[3]
H[6]
R[2]
H[5]
R[1]
H[4]
The mask bits enable filtering using the corresponding bit in the pattern register. For example, a 1b in the LSB
of mask 1 means that the filter module should compare the LSB of nibble 1 in the pattern register to the first
data bit on the transaction. If these match, then a true result is returned. A 0b in a mask bit means that the
filter module should ignore that data bit of the transaction. If all 0s are programmed in the mask bits, the filter
matches all patterns returning a true result (default 00h).
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