AS3525-A/-B C22O22
Data Sheet, Confidential
7.4.8.6 Register Description
Table 122 Microphone Related Register
Name
Base
Offset
Description
Enable/disable driver stage
Interrupt settings for microphone detection
AudioSet_1
IRQ_ENRD_1
IRQ_ENRD_2
I2C audio master
I2C audio master
I2C audio master
0x14
0x26
0x27
Interrupt settings for remote button press detection
Table 123 MIC1_R & MIC2_R Register
Name
Base
Default
0x00
MIC1_R, MIC2_R
I2C audio master
Right Microphone Input Registers
Offset: 0x06, 0x08
This register is reset when the block is disabled in AudioSet1 register (0x14) or at a
DVDD-POR. The register cannot be written when the block is disabled.
Bit
Bit Name
Default
Access
Bit Description
0: automatic gain control enabled
7
Mic1_AGC_off
Mic2_AGC_off
Mic1_Gain
0
R/W
1: automatic gain control disabled
00: gain set to 28 dB
01: gain set to 34 dB
10: gain set to 40 dB
11: reserved, do not use.
volume settings for right microphone input,
adjustable in 32 steps @ 1.5dB
11111: 6 dB gain
6:5
4:0
00
R/W
R/W
Mic2_Gain
Mic1R_VOL
Mic2R_VOL
00000
11110: 4.5 dB gain
..
00001: -39 dB gain
00000: -40.5 dB gain
Table 124 MIC1_L & MIC2_L Register
Name
Base
Default
0x00
MIC1_L, MIC2_L
I2C audio master
Left Microphone Input Registers
Offset: 0x07, 0x09
This register is reset when the block is disabled in AudioSet1 register (0x14) or at a
DVDD-POR. The register cannot be written when the block is disabled.
Bit
Bit Name
Default
Access
Bit Description
0: microphone supply enabled
1: microphone supply disabled
0: microphone input set to mute
1: normal operation
7
Mic1_Sup_off
Mic2_Sup_off
Mic1_Mute_off
Mic2_Mute_off
0
0
0
R/W
6
R/W
5
n/a
4:0
Mic1L_VOL
Mic2L_VOL
00000
R/W
volume settings for left microphone input,
adjustable in 32 steps @ 1.5dB
11111: 6 dB gain
11110: 4.5 dB gain
..
00001: -39 dB gain
00000: -40.5 dB gain
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