Z86130 ZILOG [Zilog, Inc.], Z86130 Datasheet - Page 17

• Manufacturer Part Number: Z86130
• Description: NTSC LINE 21 DECIDER
• Manufacturer: ZILOG [Zilog, Inc.]

General Purpose OSD Modes (Z86129 only)
In addition to displaying data extracted from Line 21 of the
incoming video, the Z86129 can display information
supplied through its serial port. This is referred to as On-
Screen Display (OSD) display mode. This mode provides:
Character Set
The Z86129 has a new character set with extended
features, such as:
Note: Contact the nearest Zilog Sales office for additional
information on how to define your own custom OSD
character set.
DS96TEL0200
Programmable Full Screen OSD: 15 display rows by
32 character columns
Graphics characters
Double high and double wide characters
Fully programmable display positioning; information
may be placed anywhere on the screen.
Accepts externally supplied, or internally generated
VSYNC to enable OSD even when no video is
present.
New font with descenders on lower case letters
Optional display mode using drop shadow font (in
other words, fringing appears on each character rather
than a solid, “black box” background).
EIA-608 Extended Characters
EIA-608 Background and Foreground attributes
Special framing and graphics characters for OSD
display.
Double High and Double Wide character display for
OSD.
Fifteen scan lines per character row for OSD and
TEXT.
P R E L I M I N A R Y
Serial Communications Interface
Communications and control of the Z86129/130/131 is
through a serial control interface. Two Serial Control
Modes are available with the Z86129/130/131 performing
as a slave device. These modes are:
1. A two wire, I
2. A three wire, serial peripheral interface (SPI).
3. A total of five device pins are dedicated to the serial
Signal
Pin #
I/O
I
SPI
Notes:
SMS = Serial Mode Select High = SPI and Low = I
SCK = Serial port clock for either Serial Mode.
SDA = Serial port data for I
SDO = Serial Data Out for SPI Mode. Not used in I
SEN = SPI Mode Enable signal. Must be High for I
I
acts as a slave device. I
the SMS pin Low and the SEN pin High. SEN must remain
High whenever I
brought Low, with SMS also Low, the part will be reset.
SDA and SCK are the data and clock lines of the I
respectively. During I
signal (pin 13), can be configured to generate interrupt
requests to the master device on selected events. (See
Note paragraph below.)
SPI Mode. SSPI Mode is selected by making the SMS pin
High. In SPI mode the Z86129/130/131 acts as a slave
device. All communications are clocked in and out as 8-bit
bytes. SCK is the serial clock (input), SDA is Data-In and
SDO is Data-Out. The SEN pin enables communication
when High, when Low High High High, the SDO pin is tri-
state.
2
2
C
C Mode. The I
Table 2. Z86129/130/131 Serial Control Signals
control port function. These pins are designated as:
SMS
6
0
1
I
2
C interface.
2
2
C port on the Z86129/130/131 always
C mode is desired. If the SEN pin is
SCK
CLK
CLK
15
I
2
C mode operation the VIN/INTRO
2
2
C Mode and Data In for SPI Mode.
C Mode is selected by bringing
Data In
Data
SDA
I/O
14
NTSC Line 21 Decoder
Data Out Enable
SDO
NA
16
O
Z86129/130/131
2
2
2
C
C Mode.
C Mode.
SEN
2
C port,
4
1
I
17
1