參數(shù)資料
型號(hào)： MSP3425G
廠商： Electronic Theatre Controls, Inc.
英文描述： MSP 34x5G Multistandard Sound Processor Family
中文描述： 中型34x5G多標(biāo)準(zhǔn)聲音處理器系列
文件頁數(shù)： 83/98頁
文件大?。?/td> 1541K
代理商： MSP3425G
PRELIMINARY DATA SHEET
MSP 34x5G
Micronas
83
6.3.5. Register MODE_REG
Note:
The use of this register is no longer recom-
mended. It should be used only in cases where soft-
ware compatibility to the MSP 34x5D is required.
Using the STANDARD SELECTION register together
with the MODUS register provides a more economic
way to program the MSP 34x5G.
As soon as this register is applied, the MSP 34x5G
works in the
MSP 34x5D Manual/Compatibility
Mode
. In this mode,
BTSC, EIA-J, and FM-Radio are
disabled
. Only MSP 34x5D features are available; the
use of MODUS and STATUS register is not allowed.
The MSP 34x5G is reset to the normal mode by first
programming the MODUS register, followed by trans-
mitting a valid standard code to the STANDARD
SELECTION register.
The register
‘
MODE_REG
’
contains the control bits
determining the operation mode of the MSP 34x5G in
the MSP 34x5D Manual/Compatibility Mode; Table 6
–
12
explains all bit positions.
Table 6
–
11:
AD_CV parameters for constant input gain (AD_CV[7]=0)
Step
AD_CV [6:1]
Constant Gain
Gain
Input Level at pin ANA_IN1+ and ANA_IN2+
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
000000
000001
000010
000011
000100
000101
000110
000111
001000
001001
001010
001011
001100
001101
001110
001111
010000
010001
010010
010011
010100
3.00 dB
3.85 dB
4.70 dB
5.55 dB
6.40 dB
7.25 dB
8.10 dB
8.95 dB
9.80 dB
10.65 dB
11.50 dB
12.35 dB
13.20 dB
14.05 dB
14.90 dB
15.75 dB
16.60 dB
17.45 dB
18.30 dB
19.15 dB
20.00 dB
maximum input level: 3 V
pp
(FM) or 1 V
pp
(NICAM)
1)
maximum input level: 0.14 V
pp
1)
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.
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