ADAU1777 Datasheet, PDF (78/108 Pages) Analog Devices – Four-ADC, Two-DAC, Low Power Codec with Audio Processor

ADAU1777
PGA CONTROL 1 REGISTER
Address: 0x24, Reset: 0x40, Name: PGA_CONTROL_1
This register controls the PGA connected to AIN1.
Data Sheet
Table 73. Bit Descriptions for PGA_CONTROL_1
Bits Bit Name Settings Description
7
PGA_EN1
Select line or microphone input. Note that the PGA inverts the signal going
through it.
0 AIN1 used as a single-ended line input. PGA powered down.
1 AIN1 used as a single-ended microphone input. PGA powered up with slewing.
6
PGA_MUTE1
Enable PGA1 mute. When PGA is muted, PGA_GAIN1 is ignored.
0 Unmuted.
1 Muted.
[5:0] PGA_GAIN1
Set the gain of PGA1.
000000 −12 dB.
000001 −11.25 dB.
010000 0 dB.
111110 +34.5 dB.
111111 +35.25 dB.
Reset Access
0x0 R/W
0x1 R/W
0x0 R/W
PGA CONTROL 2 REGISTER
Address: 0x25, Reset: 0x40, Name: PGA_CONTROL_2
This register controls the PGA connected to AIN2.
Table 74. Bit Descriptions for PGA_CONTROL_2
Bits Bit Name Settings Description
7
PGA_EN2
Select line or microphone input. Note that the PGA inverts the signal going
through it.
0 AIN2 used as a single-ended line input. PGA powered down.
1 AIN2 used as a single-ended microphone input. PGA powered up with slewing.
Reset Access
0x0 R/W
Rev. 0 | Page 78 of 108