REV. 0

AD1981BL

–16–

LPBK

Loopback Control. ADC/DAC Digital Loopback Mode.

0 = No Loopback (Default).

1 = Loopback PCM Digital Data from ADC Output to DAC.

MS

MIC Select. Selects mono MIC input.

0 = Select MIC1.

1 = Select MIC2.

See 2CMIC bit in Register 76h to enable stereo microphone recording.

MIX

Mono Output Select. Selects mono output audio source.

0 = Mixer mono output (reset default).

1 = MIC1 channel.

General-Purpose Register (Index 20h)

Reg

No.

Name

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Default

20h

General-Purpose

X

X

X

X

X

X

MIX

MS

LPBK

X

X

X

X

X

X

X

0000h

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.