lm49370rl National Semiconductor Corporation, lm49370rl Datasheet - Page 34

• Manufacturer Part Number: lm49370rl
• Description: Audio Sub-system With An Ultra Low Emi, Spread Spectrum, Class D Loudspeaker Amplifier, A Dual-mode Stereo Headphone Amplifier, And A Dedicated Pcm Interface For Bluetooth Transceivers
• Manufacturer: National Semiconductor Corporation

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Bits
4:0
7:5
12.14 AGC_3 CONFIGURATION REGISTER
This register is used to control the LM49370's Automatic Gain Control. (Note 19)
Note 19: See the AGC overview.
AGC_HOLDTIME This programs the amount of delay before the AGC algorithm begins to adjust the gain of the microphone
AGC_ATTACK
Field
preamplifier.
This programs the speed at which the AGC will reduce gains if it detects the input level is too large.
AGC_HOLDTIME
00100
AGC_ATTACK
00000
00001
00010
00011
11101
11110
11111
2
000
001
010
011
100
101
110
111
TABLE 16. AGC_3 (0x0Ah)
to 11100
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
34
Description
No. of speech segments
Step Time (ms)
4 to 28
1024
2048
4096
128
256
512
29
30
31
32
64
0
1
2
3