Changhong Electric PT4216, Service Manual, Page: 21 / 62

21
91 XRV vertical reference I/O expansion-port:
In ten bit video output mode: this signal represents the video bit 0.
92 XRH horizontal reference I/O expansion-port:
In ten bit video output mode: this signal represents the video bit 1.
94 XCLK clock I/O expansion port
95 XDQ
data qualifier I/O expansion port
96 XRDY task flag or read signal from scaler, controlled by XRQT (subaddr. 83H)
97 TRSTN
Test Reset Not for Boundary Scan Test (with internal pull-up); for board design
without Boundary Scan connect TRSTN to ‘ground’
(1)
98 TCK
Test Clock for Boundary Scan Test (with internal pull-up)
(2)
99 TMS Test Mode Select for Boundary Scan Test or Scan Test (with internal pull-up)
(2)
2.9
．
Brief Introduction to UOC (
Ⅲ
TDA15063H)
：
The UOC
III
series combines the functions of a Video Signal Processor (VSP) together with a FLASH embedded
TEXT/Control/Graphics -Controller (TCG -Controller) and US Closed Caption decoder.
●
DVB/VSB IF circuit for preprocessing of digital TV signals;
●
Video switch with 3 external CVBS inputs and a CVBS output;
●
Automatic Y/C signal detector;
●
Adaptive digital (4H/2H) PAL/NTSC comb filter for optimum separation of the luminance and the chrominance signal
●
Picture improvement features with peaking (with switchable center frequency, depeaking, variable positive/negative peak
ratio, variable pre-/overshoot ratio and video dependent coring), dynamic skin tone control, gamma control and blue and black
stretching. All features are available for CVBS, Y/C and RGB/YP
B
P
R
signals.
The mono intercarrier sound circuit has a selective FM-PLL demodulator which can be switched to the different FM sound
frequencies (4.5/5.5/6.0/6.5 MHz). The quality of this system is such that the external band-pass filters can be omitted. In the
stereo versions of UOC
III
the use of this demodulator is optional for special applications.
Normally the FM demodulators of the stereo demodulator/decoder part are used (see below).
●
The FM-PLL demodulator can be set to centre frequencies of 4.72/5.74 MHz so that a second sound channel can be
demodulated. In such an application it is necessary that an external band-pass filter is inserted.
●
The vision IF and mono intercarrier sound circuit can be used for the demodulation of FM radio signals. With an external FM
tuner also signals with an IF frequency of 10.7MHz can be demodulated. For the QIP90 versions this is valid only for the
“stereo” versions
● Built-in adaptable brightness delay circuit
● switchable brightness signal transmission rate
Pin Description ：
Pin Name Description
1,2,12,18,28,40
68,81,89,92,95,101
121,125 VSS,GND ground
3,4,45,69,82,88,90,
91,93,94,96,100,
110,117,118,124 VDD Power supply
5 VREF_POS_LSL
6 VREF_HPL
7 VREF_HPR
8 VREF_HPR
9 VREF_POS_HPR SDAC input signal
10 XTALIN Crystal oscillator input
11 XTALOUT Crystal oscillator output
13 VGUARD/SWIO
V-guard input / I/O switch
14 DECDIG decoupling digital supply
15 VP1 decoupling digital supply