MSP3415G ETC, MSP3415G Datasheet - Page 46

• Manufacturer Part Number: MSP3415G
• Description: MSP 34x5G Multistandard Sound Processor Family
• Manufacturer: ETC

MSP 34x5G
Pin 46, 47, 48, 49, 50, 51 NC – Pins not connected.
Pin 52, ASG – Analog Shield Ground
Analog ground (AHVSS) should be connected to this
pin to reduce cross coupling between SCART inputs.
Pins 53, 54, SC2_IN_L/R – SCART2 Inputs
(Fig. 4–14)
The analog input signal for SCART2 is fed to this pin.
Analog input connection must be AC coupled.
Pin 55, ASG – Analog Shield Ground
Analog ground (AHVSS) should be connected to this
pin to reduce cross coupling between SCART inputs.
Pins 56, 57, SC1_IN_L/R – SCART1 Inputs
(Fig. 4–14)
The analog input signal for SCART1 is fed to this pin.
Analog input connection must be AC coupled.
Pin 58, VREFTOP – Reference Voltage IF AD Con-
verter (Fig. 4–15)
Via this pin, the reference voltage for the IF AD con-
verter is decoupled. It must be connected to AVSS
pins with a 10 F and a 100nF capacitor in parallel.
Traces must be kept short.
Pin 59, NC – Pin not connected
Pin 60, MONO_IN – Mono Input (Fig. 4–14)
The analog mono input signal is fed to this pin. Analog
input connection must be AC coupled.
Pins 61, 62, AVSS* – Ground for Analog Power Supply
Voltage
Ground connection for the analog IF input circuitry of
the MSP.
Pins 63, 64, NC – Pins not connected
Pins 65, 66, AVSUP* – Analog Power Supply Voltage
Power is supplied via this pin for the analog IF input cir-
cuitry of the MSP. This pin must be connected to the
+5 V supply.
Pin 67, ANA_IN1+ – IF Input 1 (Fig. 4–15)
The analog sound if signal is supplied to this pin.
Inputs must be AC coupled. This pin is designed as
symmetrical input: ANA_IN1+ is internally connected
to one input of a symmetrical op amp, ANA_IN to the
other.
Pin 68, ANA_IN – IF Common (Fig. 4–15)
This pin serves as a common reference for ANA_IN1/
2+ inputs.
Pin 69, NC – Pin not connected
Pin 70, TESTEN – Test Enable Pin (Fig. 4–12)
This pin enables factory test modes. For normal opera-
tion it must be connected to ground.
46
Pins71, 72, XTAL_IN, XTAL_OUT – Crystal Input and
Output Pins (Fig. 4–20)
These pins are connected to an 18.432 MHz crystal
oscillator which is digitally tuned by integrated shunt
capacitances. An external clock can be fed into
XTAL_IN. The audio clock output signal AUD_CL_OUT
is derived form the oscillator. External capacitors at
each crystal pin to ground (AVSS) are required. It
should be verified by layout, that no supply current for
the digital circuitry is flowing through the ground con-
nection point.
Pin 73, TP – Test pin
Pins 74, 75, 76, NC – Pins not connected
Pins 77, 78, D_CTR_I/O_1/0 – Digital Control Input/
Output Pins (Fig. 4–19)
General purpose input/output pins. Pin D_CTR_I/O_1
can be used as an interrupt request pin to the control-
ler.
Pin 79, ADR_SEL – I
(Fig. 4–16)
By means of this pin, one of 3 device addresses for the
MSP can be selected. The pin can be connected to
ground (I
(84/85
Pin 80, STANDBYQ – Standby
In normal operation, this pin must be high. If the
MSP 34x5G is switched off by first pulling STANDBYQ
low and then (after >1 s delay) switching off DVSUP
and AVSUP, but keeping AHVSUP (‘Standby’-mode),
the SCART switches maintain their position and func-
tion.
* Application Note:
All ground pins should be connected to one low-resis-
tive ground plane. All supply pins should be connected
separately with short and low-resistive lines to the
power supply. Decoupling capacitors from DVSUP to
DVSS, AVSUP to AVSS, and AHVSUP to AHVSS are
recommended as closely as possible to these pins.
Decoupling of DVSUP and DVSS is most important.
We recommend using more than one capacitor. By
choosing different values, the frequency range of
active decoupling can be extended. In our application
boards we use: 220 pF, 470 pF, 1.5 nF, and 10 F. The
capacitor with the lowest value should be placed near-
est to the DVSUP and DVSS pins.
The ASG pins should be connected as closely as pos-
sible to the MSP ground. If they are lead with the
SCART-inputs as shielding lines, they should not be
connected to ground at the SCART connector.
hex
2
) or left open (88/89
C device addresses 80/81
2
C Bus Address Select
PRELIMINARY DATA SHEET
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).
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), to +5V supply
Micronas