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參數(shù)資料
| 型號(hào)： | TDA938X |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | TV signal processor-Teletext decoder with embedded m-Controller |
| 中文描述： | 電視信號(hào)處理器與嵌入式米圖文電視解碼器控制器 |
| 文件頁(yè)數(shù)： | 53/140頁(yè) |
| 文件大?。?/td> | 570K |
| 代理商： | TDA938X |
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Philips Semiconductors
Preliminary specification
1999 Sep 28
53
TV signal processor-Teletext decoder with
embedded
μ
-Controller
TDA 935X/6X/8X series
The newsflash (C5), subtitle (C6), suppress header (C7), inhibit display (C10) and language control (C12 to 14)
bits are dealt with automatically by the display section, described below.
The update (C8) bit has no effect on the hardware. The remaining 32 bytes of the page header are parity
checked and written into columns 8 to 39 of row 0. Bytes which pass the parity check have the MSB set to logic
0 and are written into the page memory. Bytes with parity errors are not written into the memory.
Mag = Magazine
PT = Page Tens
PU = Page Units
HT = Hours Tens
HU = Hours Units
MT = Minutes Tens
C4 = Erase page
C5 = Newsflash
C6 = Subtitle
C7 = Suppress Header
C8 = Update
MU = Minutes Units
C9 = Interrupted Sequence
C10 = Inhibit Display
C11 = Magazine Serial
C12-14 = Language Selection
I
NVENTORY
P
AGE
If the TXT0.INV on bit is 1, memory block 8 is used as an inventory page. The inventory page consists of two
tables, - the Transmitted Page Table (TPT) and the subtitle page table (SPT).
In each table, every possible combination of the page tens and units digit, 00 to FFh, is represented by a byte.
Each bit of these bytes corresponds to a magazine number so each page number, from 100 to 8FF, is
represented by a bit in the table. The bit for a particular page in the TPT is set when a page header is received
for that page. The bit in the SPT is set when a page header for the page is received which has the ‘subtitle’ page
header control bit (C6) set.The bit for a particular page in the TPT is set when a page header is received for that
page. The bit in the SPT is set when a page header for the page is received which has the ‘subtitle’ page header
control bit (C6) set.
Col
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
0
1
2
3
4
5
6
7
8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Hamming error
Hamming error
Hamming error
Hamming error
Hamming error
Hamming error
Hamming error
Hamming error
FOUND
0
PU3
PT3
MU3
C4
HU3
C6
C10
C14
0
PU2
PT2
MU2
MT2
HU2
C5
C9
C13
Mag2
PU1
PT1
MU1
MT1
HU1
HT1
C8
C12
Mag1
PU0
PT0
MU0
MT0
HU0
HT0
C7
C11
Mag0
9
0
0
PBLF
0
0
0
0
10
:
23
UNUSED
Table 14 The data in row 25 of the basic memory
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