Texas Instruments EUROTEXT CF70200 Manual
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Texas Instruments EUROTEXT CF70200 Manual

Universal teletext systems
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Consumer Products Family
UNIVERSAL TELETEXT SYSTEMS
Teletext Decoder EUROTEXT
CF70200
Draft 1
4Q / 95
Application Specific Integrated Circuits

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Summary of Contents for Texas Instruments EUROTEXT CF70200

  • Page 1 Consumer Products Family UNIVERSAL TELETEXT SYSTEMS Teletext Decoder EUROTEXT CF70200 Draft 1 4Q / 95 Application Specific Integrated Circuits...

  • Page 2: Table Of Contents

    CONTENTS 1.0 DESCRIPTION 1.1 Eurotext Family of Devices. 2.0 PAGE CAPTURE MODES 2.1 Normal Mode 2.2 FLOF Mode 2.3 Favourite Page Mode 2.5 Sub-Page Mode 2.6 Menu Page Mode 3.0 CONTROL INTERFACE 4.0 DISPLAY 5.0 RGB OUTPUTS 6.0 LANGUAGES 7.0 SYSTEM TIMING 8.0 I C INTERFACE 9.0 PIN DESCRIPTION...

  • Page 3: Description

    625 line TV transmissions having teletext in the Vertical Blanking CLKIN Interval (VBI). When used with an Analogue Interface DGND GREEN device (Texas Instruments’ CF72306 or CF72416), it AVCC TEST1 provides a flexible teletext solution incorporating BLUE TEST4...

  • Page 4: Eurotext Family Of Devices

    UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 1.0 Description (Continued) The pin out and software commands have been designed to use either UNITEXT or EUROTEXT chips without any modification to the hardware or software, allowing a single, four or an eight page decoder to share the same PCB and controlling software.

  • Page 5: Page Capture Modes

    UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 2.0 PAGE CAPTURE MODES The EUROTEXT decoder can operate in four main modes of operation depending upon the transmitted teletext signal and the controlling microprocessor. These modes are: Normal FLOF Favourite Page In EUROTEXT, the on-chip processor will automatically select the pages to be stored in memory in all modes of operation except Favourite Page mode.
  • Page 6 UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 2.0 PAGE CAPTURE Normal Mode Packet 27/0 Received for Display page? Basic TOP Table received? Set to TOP Mode Packet 27/0 Received for Display page? FLOF (Fast-text) Mode. Store Normal FLOF Favourite Page Number Display Page Display Page...

  • Page 7: Normal Mode

    UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 2.1 Normal Mode EUROTEXT defaults to Normal Mode on power up and channel change so that this mode is entered for teletext services that do not transmit TOP or FLOF. Row 24 will be generated internally and will display coloured links to the stored pages.

  • Page 8: Flof Mode

    UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 2.2 FLOF Mode The FLOF mode can either be selected manually or may be selected automatically by EUROTEXT if it is set to AUTO mode. In AUTO mode, the decoder will select FLOF mode if it has received a valid packet 27 for the display page.
  • Page 9 UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 2.4 TOP Mode The TOP Mode can either be selected manually or may be selected automatically by EUROTEXT if it is set to AUTO mode. In AUTO mode, the decoder will select TOP mode if it has received a valid basic TOP table but has not received a valid packet 27 for the display page.

  • Page 10: Sub

    UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 Last Page TOP1 TOP2 TOP3 TOP4 Depends on Selected Via Current Page Digit entry, RED Next Block, Next Block or Next Block Page Key or TOP Group or Normal Group Page If a block page initialisation Page then last block...

  • Page 11: Menu

    UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 Store Number Normal FLOF Favourite Page Display Page Display Page Display Page Display Page Basic TOP Basic TOP Basic TOP Table Table or Table or Inventory Page Inventory Page Green Favourite Page 1 Add.

  • Page 12: Control Interface

    The control interface for EUROTEXT has been designed to ensure that only a single byte command is required for all the basic user commands. The commands used have been selected to match the basic commands used by UNITEXT (Texas Instruments’ single page decoder) for all the basic teletext commands.
  • Page 13 UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 5.0 RGB OUTPUTS (continued) The value of the voltage generated across RL is fixed by: 1. The reference circuit 2. The adjustable current source 3. The resistors R and RL. (RGBSET) Minimum and maximum output voltages can be calculated using the following equations: ...
  • Page 14 UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 5.0 RGB OUTPUTS - (continued) Inside Eurotext Outside Eurotext 5K (Typical) Reference Circuit RGBSET Control RGBSET 3ohms ˜ 3ohms ˜ 3ohms ˜ RGB Output Circuit Diagram. DRAFT 11 15-Feb-96 1Q96...

  • Page 15: Languages

    All system timing functions, including the 11.5625 MHz display pixel clock, are produced in the digital PLL & TV sync timing block using the oscillator output from the Texas Instruments CF72306 or CF72416 data slicer. The display sync signals generated are flexible and can be software controlled to provide interlaced or non-interlaced text displays with locked of unlocked field sync.
  • Page 16 UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 Data Transfer from EUROTEXT The decoder status, received teletext data, and other data, is transmitted by EUROTEXT when the bus master places a ‘start condition’ on the bus and sends the bus address with the R/W bit set to 1 (hex 23).

  • Page 17: Pin Description

    UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 9.0 PIN DESCRIPTION Data Input Pins Composite sync input. This pin should be connected to the SYNC output of the data slicer. TCLK Teletext clock signal. This pin should be connected to the TCLK pin of the data slicer.
  • Page 18 UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 9.0 PIN DESCRIPTION (continued) System CLKIN System clock 13.875 MHz, driven from the CF72306 or CF72416 data slicer. RSTB System Reset active low. The EUROTEXT device has an internal reset circuit. It should be connected to ground via a 100nF capacitor. However, this pin can be used if a hardware system reset is required.

  • Page 19: Eurotext Character Sets

    UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 10.0 EUROTEXT CHARACTER SETS National National Option Option National Option National Option National National Option Option National National Option Option National National Option Option National National Option Option National Option DRAFT 11 15-Feb-96 1Q96...
  • Page 20 UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 10.0 EUROTEXT CHARACTER SETS (Continued) DRAFT 11 15-Feb-96 1Q96...
  • Page 21 UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 10.0 EUROTEXT CHARACTER SETS (Continued) ENGLISH SWEDISH GERMAN ITALIAN FRENCH DRAFT 11 15-Feb-96 1Q96...
  • Page 22 UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 10.0 EUROTEXT CHARACTER SETS (Continued) SPANISH TURKISH CZECH POLISH SERBO-CROAT ROMANIAN DRAFT 11 15-Feb-96 1Q96...

  • Page 23: Applications Circuits

    22F SYNC AGND 22nF CF72416 VIDEO FLAG2 INPUT TEST5 FLAG2 TSIG TXTSEL 22nF FLAG1 SYNC FLAG1 SSIG SYNC DVCC C12 10nF VIDEO CSIG DGND 220pF C4 13.875 RGBSET AGND1 WIND 100nF RSTB AGND OSC1 DVCC DGND 100nF 10nF 100nF 15pF CLKIN OSC2 OSCOUT...

  • Page 24: Circuit Using Cf70200 And Cf72306

    22F C5 10nF SYNC AGND CF72306 VIDEO FLAG2 INPUT TEST5 FLAG2 TSIG SCOUT FLAG1 SYNC FLAG1 SSIG SYNC DVCC C12 10nF VIDEO CSIG DGND 220pF C4 13.875 RGBSET AGND1 WIND 100nF RSTB AGND OSC1 DVCC DGND 100nF 10nF 100nF 15pF CLKIN OSC2 OSCOUT...

  • Page 25: Absolute Maximum Ratings

    UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 12.0 ABSOLUTE MAXIMUM RATINGS Supply Voltage, Vcc 6.5V Input Voltage Vcc + 0.5V 20mA Current Any signal pin Operating free air temperature range 0ºC to 70ºC Storage Temperature range -65ºC to 150ºC Latch up 250mA @ 25ºC Stresses beyond those listed under ‘Absolute Maximum Ratings’...
  • Page 26 UNIVERSAL TELETEXT DECODERS ‘EUROTEXT’ ‘EUROTEXT’ CF70200 CF70200 13.0 RECOMMENDED OPERATING CONDITIONS (Continued) Symbol Parameter Test Conditions unit Output Voltage 1.328 RGBSET A RGB Set Current -330 Output Current 1.49 2.48 R(RGBSET)=40K Output Current 4.95 8.85 R(RGBSET)=12K Output Current 14.9 24.8 R(RGBSET)=4K...

  • Page 27: Packaging

    28-Pin Plastic Dual-in-line Wide Body Package Dimensions in millimetres (inches) 2.8 (0.110) NOM 2.0 (0.080) NOM 2.4 (0.093) R NOM EITHER INDEX 36.6 (1.44) MAX 15.24 ±0.25 (0.600 ±0.010) 1.78 (0.070) 0.25 (0.010) NOM 1.14 (0.045) 0.51 (0.20) 5.08 (0.2) SEATING PLANE 105°...

  • Page 28: Pin Plcc Package

    FN PLASTIC CHIP CARRIER (20-terminal package used for illustration) DIMENSIONS IN MILLIMETRES (INCHES) 4.20 (0.165) min 17.40 (0.685) min 2.29 (0.090) 1.14 (0.045) R. Typ. 0.64 (0.025) 16.510 (0.650) min 1.22 (0.048) 1.35 (0.053) x 45º x 45º 1.07 (0.0042) 1.19 (0.047)) 14.99 (0.590) min (at Seating Plane)
  • Page 29 ‘EUROTEXT’ CF70200 CF70200 IMPORTANT NOTICE Texas Instruments (TI) reserves the right to make changes to or to discontinue any semiconductor product or service identified in this publication without notice. TI advises its customer to obtain the latest version of the relevant information to verify, before placing orders, that the information being relied on is current.

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