Philips TE3.1E CA, Руководство по обслуживанию, Страница: 30 / 43

Circuit Description and Abbreviation List EN 30 TE3.1E CA 9.
9. Circuit Description and Abbreviation List
Index of this chapter:
9.1 BASIC HARDWARE DESCRIPTIONS
9.2 FUNCTIONAL DESCRIPTION
9.3 List of Abbreviations
9.4 IC Data Sheets
9.1 BASIC HARDWARE DESCRIPTIONS
9.1.1 ST92195C/D Microcontroller
General Features :
• Register File based 8/16 bit Core Architecture with RUN,
WFI, SLOW, HALT modes
• 00 to +700C operating temperature range
• Up to 24MHz. operation @ 5V r 10%
• Min. Instruction cycle time: 165ns @ 24MHz.
• 48, 56, 64, 84 or 96 Kbytes ROM
• 256 bytes RAM of Register file (accumulators or index
registers )
• 256 to 512 bytes of on-chip static RAM
• 2 or 8 Kbytes of TDSRAM (Teletext and Display Storage
RAM )
• 28 fully programmable I/O pins
• Serial Peripheral Interface
• Flexible Clock controller for OSD, Data Slicer and Core
Clocks running from a single low frequency external
crystal.
• Enhanced display controller with 26 rows of 40/80
characters
–
2 sets of 512 characters, 10x10 dot matrix, definable
by user
– Serial and Parallel attributes
– 4/3 and 4/3 Expand supported in 50/60Hz mode
– Rounding, fringe, double width, double height,
scrolling, cursor, full background colour, half intensity
colour, translucency and half-tone modes
• Teletext unit, including DataSlicer, Acquisition unit and up
to 8Kbytes RAM for data storage
• VPS and Wide Screen Signalling slicer
• Integrated Sync Extractor and Sync Controller
• 14-bit Voltage Synthesis for tuning reference voltage
• Up to 6 external interrupts plus one Non - Maskable
Interrupt
• 8 x 8-bit programmable PWM outputs with 5V open-drain
or push-pull capability
• 16-bit watchdog timer with 8-bit prescaler
• 1 or 2 16-bit standard timer(s) with 8-bit prescaler
• I2C Master/Slave (on some devices )
• 4-channel A/D converter; 5-bit guaranteed
• Rich instruction set and 14 addressing modes
• Versatile development tools, including Assembler, Linker,
C-compiler,Archiver, Source Level Debugger and
hardware emulators with Real-Time Operating System
available from third parties
• Pin-compatible EPROM and OTP devices available
I/O Ports
Up to 28 I/O lines are dedicated to digital input/output. These
lines are grouped into up to 5 I/O Ports and can be configured
on a bit basis under sw control to provide timing, status signals,
timer and output, analog inputs, external interrupts and serial or
parallel I/O.
TV Peripherals
A set of on-chip peripherals form a complete system for TV set
and VCR applications:
•
Voltage Synthesis
• VPS / WSS Slicer
• Teletext Slicer
• Teletext Display RAM
• OSD
On Screen Display
The human interface is provided by the On Screen Display
module, this can produce up to 26 lines of up to 80 characters
from a ROM defined 512 character set. The character
resolution is 10X10 dot. Four character sizes are supported.
Serial attributes allow the user to select foreground and
background. Parallel attributes can be used to select additional
foreground and background colours and underline on a
character-by-character basis.
Teletext and Display Storage RAM
The Internal Teletext and Display storage RAM can be used to
store Teletext pages as well as Display parameters.
Teletext VPS and WSS Data Slicers
The three on-board data slicers using a single external crystal
are used to extract the teletext, VPS and WSS information from
the video signal. Hardware hamming decoding is provided.
Voltage Synthesis Tuning Control
14-bit Voltage Synthesis using the PWM /BRM technique can
be used to generate tuning voltages for TV set applications.
The tuning voltage is output on one of two separate output pins.
PWM Output
Control of TV settings can be made with up to eight 8-bit PWM
outputs, with a maximum frequency of 23.437Hz at 8-bit
resolution (INTCLK = 12MHz). Low resolutions with higher
frequency operation can be programmed.
Serial Peripheral Interface (SPI)
The SPI bus is used to communicate with external devices via
the SPI, or I2C bus communication standards. The SPI uses a
single data line for data input and output. A second line is used
for a synchronous clock signal.
Standard Timer
The ST92195C has one Standard Timer (STIMO) that includes
a programmable 16-bit down counter an associated 8-bit
prescaler with Single and Continuous counting modes.
Analog/Digital Converter
In addition there is a 4-channel analog to Digital Converter with
integral sample and hold, fast5.7ms conversion time and 6-bit
guaranteed resolution.
9.1.2 ST24C16 EEPROM
• 1 Million erase / write cycles with 40 years data retention
• Single Supply Voltage :3V to 5.5V
• Programmable write protection
• Two wire serial interface, fully I2C bus compatible
• Byte and multibyte write (up to 8 byte)
• Page write (up to 16 byte)
• Byte, random and sequential read modes
• Self timed programming cycle
• Automatic address incrementing
• Enhanced esd/latch up performances