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9
AK - 53
CHASSIS
4. DIGITAL TV PROCESSOR (PNX300X (CALLED AS ADOC))
The DOC system serves the TV functionality for small signal processing of audio, video, VBI services, graphics and
control. This chip implements all TV functions in digital technology. PNX300X is the digital TV processor which consists
of:
•
control. This chip implements all TV functions in digital technology. PNX300X is the digital TV processor which consists
of:
•
TV video processor
•
TV deflection processor
•
TV audio processor
•
TV microcontroller
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As it is shown in the below block diagram ADOC gets the digital signal which is converted by MPIF and processed in its
own blocks and controls the overall system by I2C and the software programme is downloaded into a flash memory
which tells microcontroller within ADOC about the software management and the output of ADOC turns into RGB, Main/
Headphone audio right/left.
Then RGB output of ADOC is processed into a RGB preamplifier circuit to get enough gain for the video output amplifier
TDA6108JF (in CRT board)
own blocks and controls the overall system by I2C and the software programme is downloaded into a flash memory
which tells microcontroller within ADOC about the software management and the output of ADOC turns into RGB, Main/
Headphone audio right/left.
Then RGB output of ADOC is processed into a RGB preamplifier circuit to get enough gain for the video output amplifier
TDA6108JF (in CRT board)
Highlight points of ADOC:
(1)- Digital (I2D) data link is connected from MPIF to ADOC with a swing of about 300 mV. The data rate is 594Mbit/s.
(2)- Only one crystal is used in overall system which is 13.5MHZ
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