Pin Description - Texas Instruments EUROTEXT CF70200 Manual

UNIVERSAL TELETEXT DECODERS
'EUROTEXT' CF70200
Data Input Pins
CSB
TCLK
TDATA
WIND
VIDEO
2
I C Interface
SDA
SCL
Display Pins
BLANK
R, G, B
RGBSET
REF
SYNC
DRAFT 11

9.0 PIN DESCRIPTION

Composite sync input. This pin should be connected to the SYNC output of
the data slicer.
Teletext clock signal. This pin should be connected to the TCLK pin of the
data slicer.
Teletext data. This pin should be connected to the TDATA pin of the data
slicer.
This output is high during the VBI lines of the video signal and is used as a
gating signal for the capture of teletext. This pin should be connected to the
WIND pin of the data slicer.
Video input to sync switch. The signal to this pin should be AC coupled.
2
I C data line. Open drain I/O pin.
2
I C clock line. Open drain I/O pin.
Blanking. This signal is high when teletext information is displayed on the
RGB lines.
Display data (75 ohm drive capacity).
Adjustment for the RGB output levels. The level of the RGB signals can be
adjusted from 0.5V to 1.5V by setting the current through this pin using an
external resistor.
Internal reference pin. A 10nF capacitor should be connected between this
pin and ground.
This pin is the output of an internal sync switch. It will either output the
composite sync. pulse from the internal sync generator in text mode or it will
be connected to the video input pin when any picture information is being
displayed.
'EUROTEXT'
15-Feb-96
CF70200
15
1Q96