� 24 �
8.3.2 Stereo Decorder (MSP3417G)8.3.3 Stereo Decorder (MSP3417G) Pin Assignment
The MSP3417G (IC 2401) is a single-chip NICAM and A2 Stereo Version
Sound Processors covers the sound processing of all analog TV standards
as well as the NICAM digital sound standards. The full TV sound processing,
starting with analog sound IF signal-in, down to processed analog AF-out,
is performed in a single chip.43210987654
44444333333
NRSPLCCCDSM
Traditionally, current ICs have to perform adjustment procedures in order to SIONNN NSL
N
O I GVTINVP
AFH
achieve good stereo separation but MSP3417G has optimum stereoN11EAA
A
OCCC
performance without any adjustments.1AVSUP 5VMVSSAHVSUP 8.0V3R3
2ANA IN1+NC32
The MSP3417G further simplifies controlling software. Standard selection
3ANA IN-1
2SC1 OUT L3
requires a single IC transmission only. The MSP3417G version has reduced
4TESTENSC1 OUT R0
control registers and less functional pins.3
5XTAL INVREF129
The MSP3417G has built-in automatic functions: The IC is able to detect8IC2401
6XTAL OUT*NC2
the actual sound standard automatically (Automatic Standard Detection).
7TPDACM L27
Furthermore, pilot levels and identification signals can be evaluated internally
28D CTR OUT1DACM R26
with subsequent switching between mono/ stereo/bilingual; no IC interaction
9D CTR OUT0VREF225
is necessary (Automatic Sound Selection).The MSP3417G can handle very
0ADR SEL4
high FM deviations even in conjunction with NICAM processing.1NC2
1STANDBYQ3
1NC2
XTAL_IN XTAL_OUT
O
C
56PPPPPP
Demodulator I2C CLI2C DATTTTTDVSUPDVSSTRESETQ
ANA_IN1+ FM1/AM .....
& 23456789012
11111111222
NICAM
FM2
(SIF) Decoder Audio PLL
2
NICAM A
NICAM B
IDENT
Figure 8.6 - Pin Assignment of MSP3417G
DACM_L
LOUDSPEAKER L27
D/A ( L-OUT)
LOUDSPEAKER RD/A ( R-OUT)
26 DACM_R
Figure 8.5 - Block Diagram of MSP3417G |
ACEC
