NEC DTE-29U1TH Service Manual page 14

-Controller
80C51 -controller core standard instruction set and timing
1 s machine cycle
32 - 128Kx8-bit late programmed ROM
3 - 12Kx8-bit Auxiliary RAM (shared with Display and Acquisition)
Interrupt controller for individual enable/disable with two level priority
Two 16-bit Timer/Counter registers
WatchDog timer
Auxiliary RAM page pointer
16-bit Data pointer
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/0 pin, ADC input or PWM (6-bit) output
Data Capture
Text memory 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 optimised -
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 lnterval (VBI) data capture of WST data
Display
Teletext and Enhanced OSD modes
Features of lever 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, 12xl3,
12x16 (VxH)]
Fringing (Shadow) selectable from N-S-E-W direction
Fringe colour selectable
Meshing of defined area
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Service Manual CP-785F