SAA7129AH NXP Semiconductors, SAA7129AH Datasheet - Page 47
![no-image](/images/manufacturer_photos/0/4/487/nxp_semiconductors_sml.jpg)
SAA7129AH
Manufacturer Part Number
SAA7129AH
Description
Manufacturer
NXP Semiconductors
Datasheet
1.SAA7129AH.pdf
(55 pages)
Specifications of SAA7129AH
Adc/dac Resolution
10b
Screening Level
Commercial
Package Type
PQFP
Pin Count
44
Lead Free Status / RoHS Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SAA7129AH
Manufacturer:
PHILIPS/飞利浦
Quantity:
20 000
Company:
Part Number:
SAA7129AH/V1,518
Manufacturer:
Sigma Designs Inc
Quantity:
10 000
Part Number:
SAA7129AH/V1,518
Manufacturer:
NXP/恩智浦
Quantity:
20 000
Company:
Part Number:
SAA7129AH/V1,557
Manufacturer:
Sigma Designs Inc
Quantity:
10 000
Philips Semiconductors
9.2
Time t
and insert it into the CVBS and VBS output signal, such
that it appears at t
(NTSC) after the leading edge of the horizontal
synchronization pulse.
Time t
source that is gated by TTXRQ in order to deliver TTX
data. This delay is programmable by register TTXHD.
For every active HIGH state at output pin TTXRQ, a new
teletext bit must be provided by the source (new protocol)
or a window of TTXRQ going HIGH is provided and the
number of teletext bits, depending on the chosen teletext
standard, is requested at input pin TTX (old protocol).
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 outgoing
horizontal synchronization pulse.
2003 Dec 09
handbook, full pagewidth
Digital video encoder
CVBS/Y
TTX
TTXRQ (new)
TTXRQ (old)
FD
PD
Teletext timing
is the time needed to interpolate input data TTX
is the pipeline delay time introduced by the
TTX
text bit #:
= 9.78 s (PAL) or t
t PD
t TTX
1
2
t FD
3
4
TTX
5
= 10.5 s
6
Fig.23 Teletext timing.
7
8
9 10 11 12 13 14
47
Time t
TTX data; it has a constant length that allows insertion of
360 teletext bits at a text data rate of 6.9375 Mbits/s (PAL),
296 teletext bits at a text data rate of 5.7272 Mbits/s (WST)
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 logic 0.
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.
i(TTXW)
t i(TTXW)
is the internally used insertion window for
SAA7128AH; SAA7129AH
15
16 17 18 19 20 21 22 23
Product specification
MHB504
24