Z86129 Datasheet, PDF (18/50 Pages) Zilog, Inc. – NTSC LINE 21 DECIDER

Z86129/130/131
NTSC Line 21 Decoder
PRELIMINARY
Z86129/130/131 FEATURE SET (Continued)
When SEN is brought High the part will be synchronized
and waiting for a Command. If SEN is tied High, the part
can also be synchronized by a command string. During
SPI mode operation the VIN/INTRO signal (pin 13), can be
configured to generate interrupt requests to the master
device on selected events. (See Note paragraph below.)
CAUTION: When the SEN and SMS pins are made Low
simultaneously, the part will be reset.
Interrupt Generation. The VIN/INTRO signal (pin 13) can
be configured to provide an interrupt output on selected
events. The configuration of VIN/INTRO (pin 13) is user
programmable to be either of two states:
1. An INPUT pin for acceptance of an external VSYNC
timing signal
2. An OUTPUT pin for interrupt generation on a selected
events
Note: Configuring VIN/INTRO as an output for interrupt
generation is particularly useful when implementing the
V-Chip feature in TVs and VCRs. In this configuration, Pin
13 is used to interrupt the host processor when the XDS
Program Rating data packet is found. As a result the host
processor is not burdened with monitoring or filtering the
line 21 data stream. The Z86129/130/131 filters the Line
21 data stream for the host processor, and generates an
interrupt only when the desired packet is found.
Setup and Operational Control
The Z86129/130/131 is extremely flexible and fully
programmable through its serial communication port. The
following tables provide a partial list of User-
Programmable Features, User Selectable Display Modes,
and Default Conditions upon Reset.
Z86129/130/131 Programmable Features
– Decoder ON/OFF
– TV scan lines per OSD row (13 or 15)
– EIA-608 extended attributes ON/OFF
– OSD drop shadow ON/OFF
– Color/Monochrome
– OSD Horizontal start position
– Text box size (# of rows)
– Text box starting row position
– NTSC or PAL
– Vertical Lock Source: Video or External VIN
– XDS Data Output, Raw or Filtered
– H Lock Source: Video or External HIN
In addition to the programmable features just listed, the
Z86129 offers a choice of eleven display modes for user
selection.
Table 3. Z86129 Display Modes
Display
Mode
CC1
CC2
CC3
CC4
T1
T2
T3
T4
XDSF
XDSG
OSD
Display Data
L21 Closed
Captions
L21 Closed
Captions
L21 Closed
Captions
L21 Closed
Captions
L21 TEXT
L21 TEXT
L21 TEXT
L21 TEXT
XDS
XDS
User Defined via
Serial Port
NTSC
Field
1 (odd)
1
2 (even)
2
1
1
2
2
2
2
Language
I
II
I
II
I
II
I
II
N/A
N/A
The Z86129/130/131 is initialized on RESET to the
following default conditions:
Table 4. RESET Default Conditions
Parameter
Display Channel
Decoder
TEXT Size
Lines/Row
Background
EIA-608 Extended Attributes
Data Outputs
Video Standard
Data Outputs
VCO Lock
BOX Timing
Vertical Lock
VIN/INTRO
Horizontal Lock
Color/Mono
OSD Display
Reset Condition
CC1
OFF
15 rows
13
BOX
ON
OFF
NTSC
OFF
Video
13.5usec
Video
INTRO & Disabled
Video
Color
Drop Shadow 15
lines/row
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DS96TEL0200