Beko D5, Service Manual

Page: 15 / 38

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µ
-Controller
•
80C51
µ
-controller core standard instruction
set andtiming
•
1
µ
s machine cycle
•
64 - 96Kx8-bit late programmed ROM
•
12Kx8-bit DataRAM (shared between
Display,Acquisition and Auxiliary RAM)
•
Interrupt controller for individual
enable/disable with twolevel 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 modes
•
14 bits PWM for Voltage Synthesis Tuning
•
8-bit A/D converter with 4 multiplexed inputs
•
5 PWM (6-bits) outputs for control of TV
analogue signals
•
18 general I/O ports
Data Capture
•
Text memory for 10 pages
•
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
µ
-
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)
datacapture of WST data
Display
•
Teletext and Enhanced OSD modes
•
Features of level 1.5 WST and US Close
Caption
•
Serial and Parallel Display Attributes
•
Single/Double/Quadruple Width and Height
for characters
•
Scrolling of display region
•
Variable flash rate controlled by software
•
Enhanced display features including
overlining, underlining and italics
•
Soft colours using CLUT with 4096 colour
palette
•
Globally selectable scan lines per row
(9/10/13/16) and character matrix [12x10,
12x13, 12x16 (VxH)]
•
Fringing (Shadow) selectable from N-S-E-W
direction
•
Fringe colour selectable
•
Meshing of defined area
•
Contrast reduction of defined area
•
Cursor
•
Special Graphics Characters with two planes,
allowing four colours per character
•
32 software redefinable On-Screen display
characters
•
4 WST Character sets (G0/G2) in single
device (e.g. Latin, Cyrillic, Greek, Arabic)
•
G1 Mosaic graphics, Limited G3 Line drawing
characters
•
WST Character sets and Closed Caption
Character set in single device