MSP3435G ETC [List of Unclassifed Manufacturers], MSP3435G Datasheet - Page 82

• Manufacturer Part Number: MSP3435G
• Description: MSP 34x5G Multistandard Sound Processor Family
• Manufacturer: ETC [List of Unclassifed Manufacturers]

MSP 34x5G
6.3.4. Register AD_CV
The use of this register is no longer recommended.
Use it only in cases where compatibility to the
MSP 34x5D is required. Using the STANDARD
SELECTION register together with the MODUS regis-
ter provides a more economic way to program the
MSP 34x5G
Table 6–9: AD_CV Register; reset status: all bits are “0”
Note: This register is initialized during STANDARD SELECTION and is automatically updated when Automatic
Sound Select (MODUS[0]=1) is on.
Table 6–10: Reference values for active AGC (AD_CV[7] = 1)
82
Bit
[0]
[1 6]
[7]
[8]
[9]
[10 15]
X: not affected while choosing the TV sound standard by means of the STANDARD SELECT Register
Application
Terrestrial TV
SAT
ADR
1)
Dual Carrier FM
NICAM/FM
NICAM/AM
NICAM only
For signals above 1.4 Vpp, the minimum gain of 3 dB is switched, and overflow of the A/D converter may result. Due to the
robustness of the internal processing, the IC works up to and even more than 3 Vpp, if norm conditions of FM/NICAM or
FM1/FM2 ratio are supposed. In this overflow case, a loss of FM-S/N-ratio of about 10 dB may appear.
Function
not used
Reference level in case of Automatic Gain
Control = on (see Table 6–10). Constant gain
factor when Automatic Gain Control = off
(see Table 6–11).
Determination of Automatic Gain or
Constant Gain
Selection of Sound IF source
(identical to MODUS[8])
MSP-Carrier-Mute Feature
not used
Input Signal Contains
2 FM Carriers
1 FM and 1 NICAM Carrier
1 AM and 1 NICAM Carrier
1 NICAM Carrier only
1 or more FM Carriers
FM and ADR carriers
(00 BB
AD_CV
hex
)
AD_CV [6:1]
Ref. Value
101000
101000
100011
010100
see DRP 3510A data sheet
100011
Settings
must be set to 0
0 = constant gain
1 = automatic gain
0 = ANA_IN1+
0 = off: no mute
1 = on: mute as de-
scribed in Section 2.2.2.
must be set to 0
AD_CV [6:1]
in decimal
40
40
35
20
35
Automatic setting by
STANDARD SELECT Register
2-8, 0A-51
0
101000
1
X
1
0
Range of Input Signal
at pin ANA_IN1+
0.10
0.10
0.10
(recommended: 0.10
0.05
0.10
PRELIMINARY DATA SHEET
3 V
3 V
1.4 V
1.0 V
3 V
pp
pp
pp
hex
pp
pp
1)
1)
1)
9
0
100011
1
1
0
X
0.8 V
Micronas
pp
)