TLV320AIC3111 Datasheet, PDF (109/156 Pages) Texas Instruments – Low-Power Audio Codec With Embedded miniDSP and Stereo Class-D Speaker Amplifier

TLV320AIC3111
www.ti.com
SLAS644B – JULY 2009 – REVISED OCTOBER 2009
BIT
READ/
WRITE
D7
R/W
D6–D0 R/W
RESET
VALUE
1
000 0000
Page 1 / Register 47: MIC PGA
DESCRIPTION
0: MIC PGA is controlled by bits D6–D0.
1: MIC PGA is at 0 dB.
000 0000: PGA = 0 dB
000 0001: PGA = 0.5 dB
000 0010: PGA = 1 dB
...
111 0110: PGA = 59 dB
111 0111: PGA = 59.5 dB
111 1000–111 1111: Reserved. Do not write these sequences to these bits.
Page 1 / Register 48: Delta-Sigma Mono ADC Channel Fine-Gain Input Selection for P-Terminal
BIT
D7–D6
(1) (2)
READ/
WRITE
R/W
D5–D4 R/W
D3–D2 R/W
D1–D0 R/W
RESET
VALUE
00
00
00
00
DESCRIPTION
00: MIC1LP is not selected for the MIC PGA.
01: MIC1LP is selected for the MIC PGA with feed-forward resistance RIN = 10 kΩ.
10: MIC1LP is selected for the MIC PGA with feed-forward resistance RIN = 20 kΩ.
11: MIC1LP is selected for the MIC PGA with feed-forward resistance RIN = 40 kΩ.
00: MIC1RP is not selected for the MIC PGA.
01: MIC1RP is selected for the MIC PGA with feed-forward resistance RIN = 10 kΩ
10: MIC1RP is selected for the MIC PGA with feed-forward resistance RIN = 20 kΩ
11: MIC1RP is selected for the MIC PGA with feed-forward resistance RIN = 40 kΩ
00: MIC1LM is not selected for the MIC PGA.
01: MIC1LM is selected for the MIC PGA with feed-forward resistance RIN = 10 kΩ
10: MIC1LM is selected for the MIC PGA with feed-forward resistance RIN = 20 kΩ
11: MIC1LM is selected for the MIC PGA with feed-forward resistance RIN = 40 kΩ
Reserved. Write only zeros to these bits.
(1) Program D7–D6 of register 48 and register 49 with the same value.
(2) Input impedance selection affects the microphone PGA gain. See the Analog Front End section for details.
Page 1 / Register 49: ADC Input Selection for M-Terminal
BIT
D7–D6 ⁽
1) (2)
READ/
WRITE
R/W
D5–D4
D3–D0 R/W
RESET
VALUE
00
00
0000
DESCRIPTION
00: CM is not selected for the MIC PGA.
01: CM is selected for the MIC PGA with feed-forward resistance RIN = 10 kΩ.
10: CM is selected for the MIC PGA with feed-forward resistance RIN = 20 kΩ.
11: CM is selected for the MIC PGA with feed-forward resistance RIN = 40 kΩ.
00: MIC1LM is not selected for the MIC PGA.
01: MIC1LM is selected for the MIC PGA with feed-forward resistance RIN = 10 kΩ.
10: MIC1LM is selected for the MIC PGA with feed-forward resistance RIN = 20 kΩ.
11: MIC1LM is selected for the MIC PGA with feed-forward resistance RIN = 40 kΩ.
Reserved. Write only zeros to these bits.
(1) Program D7–D6 of register 48 and register 49 with the same value.
(2) Input impedance selection affects the microphone PGA gain. See the Analog Front End section for details.
BIT
READ/
WRITE
D7
R/W
D6
R/W
D5
R/W
D4–D1 R/W
D0
R
RESET
VALUE
0
0
0
0000
0
Page 1 / Register 50: Input CM Settings
DESCRIPTION
0: MIC1LP input is floating, if it is not used for the MIC PGA and analog bypass.
1: MIC1LP input is connected to CM internally, if it is not used for the MIC PGA and analog bypass.
0: MIC1RP input is floating, if it is not used for the MIC PGA and analog bypass.
1: MIC1RP input is connected to CM internally, if it is not used for the MIC PGA and analog bypass.
0: MIC1LM input is floating, if it is not used for the MIC PGA.
1: MIC1LM input is connected to CM internally, if it is not used for the MIC PGA.
Reserved. Write only zeros to these bits.
0: Not all programmed analog gains to the ADC have been applied yet.
1: All programmed analog gains to the ADC have been applied.
Copyright © 2009, Texas Instruments Incorporated
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REGISTER MAP 109