ARCHITECTURAL OVERVIEW
The Z86230 is a stand-alone integrated circuit, capable of processing Extended  Data Services (XDS) in Field 2 of the Vertical Blanking Interval (VBI) of a video  frame. This device conforms to the transmission format defined in the Television  Decoder Circuits Act of 1990, in accordance with the Electronics Industry Association specification EIA-608A and EIA-744A.
   
In addition, the Z86230 is ideally suited to monitor Picture-In-Picture (PiP) window video for violence blocking and other XDS data services. Highlights of the Z86230 include:
1. A stand-alone Line 21 Decoder for Extended Data Services (XDS).
2. Extractable XDS data from the input video.
3. Full output of a selectable V-Chip Program Blocking signal (PB).
4. Selectable XDS filter parameters from a list of preprogrammed values.
5. Minimal communications and control overhead that provides simple
    implementation of Violence Blocking and Auto Clock Set Features.
6. Full output of the recovered XDS data through the I2C serial communication
    port.
7. Two different slave addresses that are selectable in the I2C serial
    communication port.
8. Selectable NTSC or PAL operation