z86230 ZiLOG Semiconductor, z86230 Datasheet - Page 9

• Manufacturer Part Number: z86230
• Description: Advanced Violence Blocking And Ntsc Line 21 Xds
• Manufacturer: ZiLOG Semiconductor

1.
1.1 B
PS000400-TVC0499
ARCHITECTURAL OVERVIEW
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D
IAGRAM AND
B
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 Associ-
ation specification EIA-608A and EIA-744A.
The XDS data is processed to provide either a Program Blocking signal (PB) or a
recovered XDS data packet. The PB matches the contents of the recovered Con-
tent Advisory packet to the user selections input on the decoder. On-chip XDS fil-
ters in the Z86230 are fully-programmable, enabling recovery of only those XDS
data packets selected for use in TVs, VCRs, and Set-Top boxes.
In addition, the Z86230 is ideally suited to monitor Picture-In-Picture (PiP) win-
dow 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
6. Full output of the recovered XDS data through the I
7. Two different slave addresses that are selectable in the I
8. Selectable
The Z86230 is designed to process XDS data of the television VBI. The device
requires both a Composite Video and a horizontal timing signal (
Several passive components are required for proper operation. Commands are
input to enable the decoder to process and control the V-Chip response to the XDS
Content Advisory packet. The Z86230 can also be configured to operate with
video signals. In
Line 22. The encoded data must conform to the waveform and command structure
defined for
Figure 1 illustrates the Functional Block Diagram of the Z86230.
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implementation of Violence Blocking and Auto Clock Set Features.
port.
communication port.
D
O
IAGRAM AND
PERATIONAL
NTSC
NTSC
Z86230—PRELIMINARY
PAL
Line 21 operation.
O
PERATIONAL
or
mode, the device decodes information encoded into VBI
O
PAL
VERVIEW
operation.
O
VERVIEW
A
2
RCHITECTURAL
C serial communication
HIN/XIN
O
2
C serial
VERVIEW
input).
PAL
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