Z86129/130/131 1 Ntsc Line 21 Decoder

1 Z86129/130/131 1 NTSC LINE 21 DECODER FEATURES Speed Pin Count/ Standard On-Screen Display Automatic Data Extraction Devices (MHz) Package Types Temp. Range & Closed Captioning V-Chip Time of Day Z86129 12 18-Pin DIP, SOIC 0° to +70°C Yes Yes Yes Z86130 12 18-Pin DIP, SOIC 0° to +70°C No Yes Yes Z86131 12 18-Pin DIP, SOIC 0° to +70°CNoNoYes ■ Complete Stand-Alone Line 21 Decoder for Closed- ■ Minimal Communications and Control Overhead Captions and Extended Data Services (XDS). Provides Simple Implementation of Violence Block, Closed Caption, and Auto Clock Set Features. ■ Preprogrammed to Provide Full Compliance with EIA- 608 Specifications for Extended Data Services. ■ Programmable, Full Screen On-Screen Display (OSD) for Creating OSD or Captions inside a Picture-in-Picture ■ Automatic Extraction and Serial Output of Special XDS (PiP) Window (Z86129 only). Packets such as Time of Day, Local Time Zone, and Program Rating (V-Chip). ■ I2C Serial Data and Control Communication ■ Cost-Effective Solution for NTSC Violence Blocking ■ User-Programmable Horizontal Display Position for inside Picture-in-Picture (PiP) Windows. easy OSD Centering and Adjustment (Z86129 only). GENERAL DESCRIPTION The Z86129/130/131 is a stand-alone integrated circuit, bility, but are ideally suited for Line 21 data slicer capable of processing Vertical Blanking Interval (VBI) data applications. from both fields of the video frame in data conforming to the transmission format defined in the Television Decoder The Z86129/130/131 can recover and output to a host pro- 2 Circuits Act of 1990 and in accordance with the Electronics cessor via the I C serial bus any XDS data packet defined Industry Association specification 608 (EIA-608). in EIA-608. On-chip XDS filters are fully programmable, enabling recovery of only those XDS data packets selected The Line 21 data stream can consist of data from several by the user, making the Z86129/130 an ideal choice for im- data channels multiplexed together. Field 1 has four data plementing NTSC Violence Block. The Z86131 is designed channels, two Captions and two Text. Field 2 has five ad- especially for extracting XDS time information for Automat- ditional data channels, two Captions, two Text and Extend- ic Clock-Set features in TVs, VCRs, and Set-Top boxes. ed Data Services (XDS). XDS data structure is defined in EIA-608. The Z86129 can recover and display data trans- In addition, the Z86129/130 is ideally suited to monitor Line mitted on any of these nine data channels. The Z86130 21 of video displayed in a PiP window for violence blocking and Z86131 are derivatives of the Z86129 which can re- purposes. A block diagram of the Z86129/130/131 is cover XDS data and output the recovered data via the se- shown in Figure 1. rial port. The Z86130 and Z86131 do not have OSD capa- 217 GENERALDESCRIPTION 218 NTSC Line21Decoder Z86129/130/131 +5V VDD 13 6 4 15 14 16 12 Intro VIN/ SMS SCK Sliced Data Line SEN SDA SDO 7 Data Data CLK Serial Video Data Buffer Slicer Recovery Control Port Data Bus Lock Status Reg Row AW FEW Addr Bus Dual (Continued) Clamp SIG VW Digital Test Reg PG II Lock Command Processor SYNC Figure 1. Diagram Z86129Block 8 Slicer CSYNC Slice Level Row 4 Latch 10 Address DOT CLK MUX 6 CG Lines DOT CLK Display DIV RAM COMP SYNC V Lock CG CHAR CLK ADDR Logic Display 8 DEC CW MSYNC CHAR Latch 13 CIR FLD Character O/S OSC MSGR Generator ADDR 4 Decoder PH1 SS CTR FLD Output PH2 I Drive Control Logic & MUX LS Line & SFLD Field SLS Control FR V/I POR Line & Fld Ref CKT Decodes GREEN BOX BLUE RED 5 9 1 11 10 17 3 2 18 HIN LPF Vss Vss(A) RREF Z86129 only Loop Filter.

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