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參數(shù)資料
| 型號： | SAA7105H |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 通用總線功能 |
| 英文描述： | Digital video encoder |
| 文件頁數(shù)： | 61/71頁 |
| 文件大?。?/td> | 354K |
| 代理商： | SAA7105H |
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2004 Mar 04
61
Philips Semiconductors
Product specification
Digital video encoder
SAA7104H; SAA7105H
11.1
Teletext timing
Time t
FD
is the time needed to interpolate input data TTX
and insert it into the CVBS and VBS output signal, such
that it appears at t
TTX
= 9.78
μ
s (PAL) or t
TTX
= 10.5
μ
s
(NTSC) after the leading edge of the horizontal
synchronization pulse.
Time t
PD
is the pipeline delay time introduced by the
source that is gated by TTXRQ_XCLKO2 in order to
deliver TTX data. This delay is programmable by register
TTXHD. For every active HIGH state at output pin
TTXRQ_XCLKO2, a new teletext bit must be provided by
the source.
Since the beginning of the pulses representing the TTXRQ
signal and the delay between the rising edge of TTXRQ
and valid teletext input data are fully programmable
(TTXHS and TTXHD), the TTX data is always inserted at
the correct position after the leading edge of the outgoing
horizontal synchronization pulse.
Time t
i(TTXW)
is the internally used insertion window for
TTX data; it has a constant length that allows insertion of
360 teletextbitsatatextdatarateof6.9375 Mbits/s(PAL),
296 teletext bits at a text data rate of 5.7272 Mbits/s (world
standard TTX) or 288 teletext bits at a text data rate of
5.7272 Mbits/s (NABTS). The insertion window is not
opened if the control bit TTXEN is zero.
Using appropriate programming, all suitable lines of the
odd field (TTXOVS and TTXOVE) plus all suitable lines of
the even field (TTXEVS and TTXEVE) can be used for
teletext insertion.
It is essential to note that the two pins used for teletext
insertion must be configured for this purpose by the
correct I
2
C-bus register settings
.
handbook, full pagewidth
ti(TTXW)
tTTX
tPD
tFD
CVBS/Y
TTX_SRES
TTXRQ_XCLKO2
text bit #:
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18 19 20
21
22
23
24
MHB891
Fig.15 Teletext timing.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA7105H | Digital video encoder |
| SAA7108 | PC-CODEC |
| SAA7109 | PC-CODEC |
| SAA7108E | PC-CODEC |
| SAA7109E | PC-CODEC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA7105H/V1,518 | 功能描述:視頻 IC PC DENC WO MACROVISION LICENSE RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| SAA7105H/V1,557 | 功能描述:視頻 IC PC GRAPHICS 85MHZ RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| SAA7105HBG | 功能描述:視頻 IC PC GRAPHICS 85MHZ ENCODER RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| SAA7108 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:PC-CODEC |
| SAA7108AE | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:HD-CODEC |
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