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LM4930 bảng dữ liệu(PDF) 7 Page - Texas Instruments

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LM4930
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SNAS212B – MAY 2004 – REVISED SEPTEMBER 2004
Table 5. GAIN CONFIG REGISTERS(1)
GAINCONFIG (XX10010).
(Set = logic 1, Clear = logic 0)
BIT
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RESET
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Address
Register
Description
4:0
LOUDSPKR_GAIN
Programs the gain of the loudspeaker amplifier. Gain is set as follows:
4:0
Loudspeaker Gain
4:0
Loudspeaker Gain
00000
-34.5dB
10000
-10.5dB
00001
-33dB
10001
-9dB
00010
-31.5dB
10010
-7.5dB
00011
-30dB
10011
-6dB
00100
-28.5dB
10100
-4.5dB
00101
-27dB
10101
-3dB
00110
-25.5dB
10110
-1.5dB
00111
-24dB
10111
0dB
01000
-22.5dB
11000
1.5dB
01001
-21dB
11001
3dB
01010
-19.5dB
11010
4.5dB
01011
-18dB
11011
6dB
01100
-16.5dB
11100
7.5dB
01101
-15dB
11101
9dB
01110
-13.5dB
11110
10.5dB
01111
-12dB
11111
12dB
9:5
HP_GAIN
Programs the gain of the headphone amplifier. Gain is set as follows:
9:5
Headphone Gain
9:5
Headphone Gain
00000
-46dB
10000
-22.5dB
00001
-45dB
10001
-21dB
00010
-43.5dB
10010
-19.5dB
00011
-42db
10011
-18dB
00100
-40.5dB
10100
-16.5dB
00101
-39dB
10101
-15dB
00110
-37.5dB
10110
-13.5dB
00111
-36dB
10111
-12dB
01000
-34.5dB
11000
-10.5dB
01001
-33dB
11001
-9dB
01010
-31.5dB
11010
-7.5dB
01011
-30dB
11011
-6dB
01100
-28.5dB
11100
-4.5dB
01101
-27dB
11101
-3dB
01110
-25.5dB
11110
-1.5dB
01111
-24dB
11111
0dB
13:10
MIC_GAIN
Programs the gain of the microphone amplifier. Gain is set as follows:
(1)
This register is used to control the gain of the headphone amplifier, the loudspeaker amplifier, and the microphone preamplifier. The 7
bit address for the GAINCONFIG register is XX10010.
(X = 0 if ADDR is set to logic 0)
(X = 1 if ADDR is set to logic 1)
Copyright © 2004, Texas Instruments Incorporated
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