Table of Contents
Advertisement
Pin Descriptions
Supply Pins
VSUP1.8DIG − Supply Voltage 1.8 V
This pin is main and standby supply for the digital core
logic of controller, video, display and deflection pro-
cessing.
VSUP1.8FE − Supply Voltage 1.8 V
This pin is main supply for the analog video front-end.
VSUP3.3FE − Supply Voltage 3.3 V
This pin is main supply for the analog video front-end.
VSUP3.3IO − Supply Voltage 3.3 V
This pin is main and standby supply for the digital I/O-
ports.
VSUP3.3DIG − Supply Voltage 3.3 V
This pin is main supply for the digital core logic of IF
and audio processing and digital video back-end.
VSUP3.3BE − Supply Voltage 3.3 V
This pin is main supply for the analog video back-end.
VSUP5.0BE − Supply Voltage 5.0 V
This pin is main supply for the analog video back-end.
VSUP8.0AU − Supply Voltage 8.0 V
This pin is main supply for the analog audio process-
ing.
GND − Ground Platform
This pin is main ground for all above supplies.
VSUP3.3DAC − Supply Voltage 3.3 V
This pin is main supply for the video DACs.
GNDDAC − Ground for 3.3 V Video DAC Supply
VSUP5.0IF − Supply Voltage 5.0 V
This pin is main supply for the analog IF front-end.
GNDIF − Ground for 5.0 V IF Supply
VSUP3.3EIO − Supply Voltage 3.3 V
This pin is main and standby supply for the extended
digital I/O-ports available in QFP package only. It is
internally connected to VSUP3.3IO.
GNDEIO − Ground for 3.3 V Extended I/O Supply
It is internally connected to GND.
Application Note:
All GND pins must be connected to a low-resistive
ground plane underneath the IC. All supply pins must
be connected separately with short and low-resistive
lines to the power supply. Decoupling capacitors from
VSUPxx to GND have to be placed as closely as pos-
sible to these pins. It is recommended to use more
CIRCUIT DESCRIPTIONS
CIRCUIT DESCRIPTIONS
CIRCUIT DESCRIPTIONS
CIRCUIT DESCRIPTIONS
CIRCUIT DESCRIPTIONS
than one capacitor. By choosing different values, the
frequency range of active decoupling can be extended.
IF Pins
VREFIF − Reference Voltage for Analog IF (Fig. 4–9)
This pin must be connected to GNDIF via a circuitry
according to the application circuit. Low inductance
caps are necessary.
IFIN+, IFIN- − Balanced IF Input (Fig. 4–6)
These pins must be connected to the SAW filter out-
put. The SAW filter has to be placed as close as possi-
ble. The layout of the IF input should be symmetrical
with respect to GNDIF .
SIF − 2nd Sound IF Output (Fig. 4–8)
Output level is set via I
processor (e.g. MSP) can be connected to this pin.
This pin is also configurable as audio input (see
Fig. 4–10).
TAGC − Tuner AGC Output (Fig. 4–7)
This pin controls the delayed tuner AGC. As it is a
noise-shaped-I-DAC output, it has to be connected
according to the application circuit.
Audio Pins
VREFAU – Reference Voltage for Analog Audio (Fig.
4–14)
This pin serves as the internal ground connection for
the analog audio circuitry. It must be connected to the
GND pin with a 3.3 µF and a 100 nF capacitor in paral-
lel. This pins shows a DC level of typically 3.77 V.
AIN1 L – Audio 1 Inputs (Fig. 4–10)
The analog input signal for audio 1 is fed to this pin.
Analog input connection must be AC coupled.
AIN1 R – Audio 1 Inputs (Fig. 4–10)
The analog input signal for audio 1 is fed to this pin.
Analog input connection must be AC coupled. This pin
is also configurable as sound IF output (see Fig. 4–8).
AIN2 R/L – Audio 2 Inputs (Fig. 4–10)
The analog input signal for audio 2 is fed to this pin.
Analog input connection must be AC coupled.
AIN3 R/L – Audio 3 Inputs (Fig. 4–10)
The analog input signal for audio 3 is fed to this pin.
Analog input connection must be AC coupled.
2
C-Bus. An appropriate sound
Advertisement
Table of Contents
