FAB2210 Datasheet, PDF (25/35 Pages) Fairchild Semiconductor – Audio Subsystem with Class-G Headphone and 3.3W Mono Class-D Speaker with Dynamic Range Compression

SP_NG_RAT [2:0]
Sets the speaker noise gate threshold. Detection is at the output of the speaker volume block. To avoid extraneous
noise, do not change this setting while the speaker amplifier is on.
SP_NG_RAT[2:0]
111
110
101
100
011
010
001
000
Threshold (mV_pk)
Reserved
Reserved
29
24
14
9
6
Noise Gate Disabled
SP_NG_ATT[1:0]
Sets the speaker noise gate attenuation level.
SP_NG_ATT[1:0]
11
10
01
00
ADDR
B7
0x84
Default
0
VA[3:0], VB[3:0]
Sets pre-amplifier gain.
VA[3:0] or VB[3:0]
1111
1110
1101
1100
1011
1010
1001
1000
B6
B5
VA[3:0]
0
1
Gain (dB)
Reserved
Reserved
Reserved
18.0
15.0
12.0
10.5
9.0
Attenuation Level (dB)
Mute
-10
-20
-40
B4
B3
B2
B1
B0
VB[3:0]
0
0
0
1
0
VA[3:0] or VB[3:0]
0111
0110
0101
0100
0011
0010
0001
0000
Gain (dB)
7.5
6.0
4.5
3.0
1.5
0.0
-1.5
-3.0
© 2011 Fairchild Semiconductor Corporation
FAB2210 • Rev. 1.1.1
25
www.fairchildsemi.com