MSP3421G MICRONAS [Micronas], MSP3421G Datasheet - Page 54

• Manufacturer Part Number: MSP3421G
• Description: Multistandard Sound Processor Family with Virtual Dolby Surround
• Manufacturer: MICRONAS [Micronas]

MSP 34x1G
Pin 38, CAPL_A – Volume Capacitor Headphone
(Fig. 4–24)
A 10- F capacitor to AHVSUP must be connected to
this pin. It serves as a smoothing filter for headphone
volume changes in order to suppress audible plops.
The value of the capacitor can be lowered to 1- F if
faster response is required. The area encircled by the
trace lines should be minimized; keep traces as short
as possible. This input is sensitive for magnetic induc-
tion.
Pin 39, AHVSUP* – Analog Power Supply High Volt-
age
Power is supplied via this pin for the analog circuitry of
the MSP (except IF input). This pin must be connected
to the 8 V supply.
Pin 40, CAPL_M – Volume Capacitor Loudspeaker
(Fig. 4–24)
A 10- F capacitor to AHVSUP must be connected to
this pin. It serves as a smoothing filter for loudspeaker
volume changes in order to suppress audible plops.
The value of the capacitor can be lowered to 1 F if
faster response is required. The area encircled by the
trace lines should be minimized; keep traces as short
as possible. This input is sensitive for magnetic induc-
tion.
Pins 41, 42, NC – Pins not connected.
Pins 43, 44, AHVSS* – Ground for Analog Power Sup-
ply High Voltage
Ground connection for the analog circuitry of the MSP
(except IF input).
Pin 45, AGNDC – Internal Analog Reference Voltage
This pin serves as the internal ground connection for
the analog circuitry (except IF input). It must be con-
nected to the VREF pins with a 3.3- F and a 100-nF
capacitor in parallel. This pins shows a DC level of typ-
ically 3.73 V.
Pin 46, NC – Pin not connected.
Pins 47, 48, SC4_IN_L/R – SCART4 Inputs
(Fig. 4–14)
The analog input signal for SCART4 is fed to this pin.
Analog input connection must be AC-coupled.
Pin 49, ASG – Analog Shield Ground
Analog ground (AHVSS) should be connected to this
pin to reduce cross-coupling between SCART inputs.
Pins 50, 51, SC3_IN_L/R – SCART3 Inputs
(Fig. 4–14)
The analog input signal for SCART3 is fed to this pin.
Analog input connection must be AC-coupled.
Pin 52, ASG – Analog Shield Ground
Analog ground (AHVSS) should be connected to this
pin to reduce cross-coupling between SCART inputs.
54
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 A/D Con-
verter (Fig. 4–16)
Via this pin, the reference voltage for the IF A/D con-
verter is decoupled. It must be connected to AVSS
pins with a 10- F and a 100-nF 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* – 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* – Ground for Analog Power Sup-
ply Voltage
Power is supplied via this pin for the analog IF input cir-
cuitry of the MSP. This pin must be connected to the
Pin 67, ANA_IN1 – IF Input 1 (Fig. 4–16)
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. 4–16)
This pins serves as a common reference for ANA_IN1/
2 inputs.
Pin 69, ANA_IN2 – IF Input 2 (Fig. 4–16)
The analog sound if signal is supplied to this pin.
Inputs must be AC-coupled. This pin is designed as
symmetrical input: ANA_IN2 is internally connected
to one input of a symmetrical op amp, ANA_IN to the
other.
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.
5 V supply.
PRELIMINARY DATA SHEET
Micronas