AD1981BL Analog Devices, AD1981BL Datasheet - Page 16

• Manufacturer Part Number: AD1981BL
• Description: Low Voltage AC'97 Soundmax Codec
• Manufacturer: Analog Devices

AD1981BL
This register should be read before writing to generate a mask for only the bit(s) that need to be changed. All registers not shown and bits containing an X are assumed
to be reserved.
LPBK
MS
MIX
Reg
No. Name
20h
General-Purpose
Loopback Control. ADC/DAC Digital Loopback Mode.
0 = No Loopback (Default).
1 = Loopback PCM Digital Data from ADC Output to DAC.
MIC Select. Selects mono MIC input.
0 = Select MIC1.
1 = Select MIC2.
See 2CMIC bit in Register 76h to enable stereo microphone recording.
Mono Output Select. Selects mono output audio source.
0 = Mixer mono output (reset default).
1 = MIC1 channel.
X
D15
X
D14
D13
X
X
D12
General-Purpose Register (Index 20h)
D11
X
D10
X
MIX
D9
–16–
D8
MS
D7
LPBK
D6
X
X
D5
D4
X
D3
X
D2
X
D1
X
D0
X
Default
0000h
REV. 0