Z8623012SSG Datasheet, PDF (16/61 Pages) Zilog, Inc. – ADVANCED PROGRAM BLOCKING AND NTSC LINE 21 XDS DECODER

Z86230 FEATURE SET
VBI DATA PROCESSING
3. Z86230 FEATURE SET
The primary features of the Z86230 are briefly described below. More complete
descriptions can be found in later sections of this document.
3.1 VBI DATA PROCESSING
The Z86230 extracts the XDS data in Line 21 of the incoming video. Processing
includes:
1. Extracting XDS data from the input video.
2. Outputting the V-Chip Program Blocking signal (PB).
3. Outputting the XDS data through the serial port (raw or filtered).
4. Selecting the XDS filter parameters from a list of preprogrammed values.
5. Selecting either NTSC or PAL operation.
3.2 SERIAL COMMUNICATIONS INTERFACE
Communications and control of the Z86230 is possible through the I²C serial con-
trol interface, composed of:
1. A 2-wire I²C interface.
2. Two available slave addresses.
TABLE 2. Z86230 SERIAL CONTROL SIGNALS
Signal
Pin #
I/O
1^st I²C Address (28h(W)/29h(R))
2^nd I²C Address(2Ah(W)/2Bh(R))
I²C SEL
1
I
0
1
SCLK
15
I
CLK
CLK
SDA
14
I/O
Data
Data
16
Z86230—PRELIMINARY
PS000401-TVC0699