akira CT-14XA9A, Service Manual

Page: 28 / 76

28
Model No: CT-14XA9A
Version 1.0
•
Horizontal synchronization with two control loops and alignment-free horizontal
oscillator
•
Vertical count-down circuit
•
Vertical driver optimized for DC-coupled vertical output stages
•
Horizontal and vertical geometry processing
•
Horizontal and vertical zoom function for 16 : 9 applications
•
Horizontal parallelogram and bow correction for large screen picture tubes
•
Low-power start-up of the horizontal drive circuit
TV signal processor-Teletext decoder with embedded M-Controller,
TDA935X/6X/8X PS/N2 series
M-Controller
•
80C51 Ix-controller core standard instruction set and timing
•
1 mui-s machine cycle
•
16 - 128KxS-bit late programmed ROM
•
3 - 12Kx8-bit DATA RAM (shared between Display, Acquisition and Auxiliary Ram)
•
Interrupt controller for individual enable/disable with two level priority.
•
Two 16-bit Timer/Counter registers
•
One 16 bit Timer with 8-bit Pre-scaler
•
WatchDog timer
•
Auxiliary RAM page pointer
•
16-bit Data pointer
•
Stand-by, Idle and Power Down (PD) mode
•
14 bits PWM for Voltage Synthesis Tuning
•
8-bit A/D converter
•
4 pins which can be programmed as general I/O pin, ADC input or PWM (6-bit) output
Data Capture
•
Text memory for 0, 1 or 10 pages
•
In the 10 page versions inventory of transmitted Teletext pages stored in .the Transmitted
Page Table (TPT) and Subtitle Page Table (SPT)
•
Data Capture for US Closed Caption
•
Data Capture for 525/625 line WST, VPS (PDC system A) and Wide Screen Signalling
(WSS) bit decoding.
•
Automatic selection between 525 WST/625 WST.
•
Automatic selection between 625 WST/VPS on line 16 of VBI.
•
Real-time capture and decoding for WST Teletext in Hardware, to enable optimized miu-
processor throughput
•
Automatic detection of FASTEXT transmission
•
Real-time packet 26 engine .in Hardware for processing accented, G2 and G3 characters
•
Signal quality detector for video and WST/VPS data types
•
Comprehensive teletext language coverage
•
Full Field and Vertical Blanking Interval (VBI) data capture of WST data Display
•
Teletext and Enhanced OSD modes.