WM9712L datasheet(20/77 Pages) WOLFSON

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WM9712L

Production Data

PD Rev 4.5 August 2006

RECORD SELECTOR

The record selector determines which input signals are routed into the audio ADC. The left and right

channels can be selected independently. This is useful for recording a phone call: one channel can

be used for the RX signal and the other for the TX signal, so that both sides of the conversation are

digitized.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

BOOST

20dB Boost

1: Boost ADC input signal by 20dB

0 :No boost

13:12

R2P

Record to phone path enable

00: Left ADC and Right ADC to phone

mixer

01 : Left ADC to phone mixer

10: Right ADC to phone imixer

11 : Muted

R2PBOOST

20dB Boost for ADC to phone signal

1: Boost signal by 20dB

0 :No boost

10:8

RECSL

000

Left ADC signal source

000: MIC* (pre-PGA)

001-010: Reserved (do not use this setting)

011: Speaker mix

100: LINEINL (pre-PGA)

101: Headphone Mix (left)

110: Phone Mix

111: PHONE (pre-PGA)

1Ah

Record

Select

2:0

RECSR

000

Right ADC signal source

000: MIC* (pre-PGA)

001-010: Reserved (do not use this setting)

011: Speaker mix

100: LINEINR (pre-PGA)

101: Headphone Mix (right)

110: Phone Mix

111: PHONE (pre-PGA)

Table 7 Audio Record Selector

Note:

*In stereo mic mode, MIC1 is routed to the left ADC and MIC2 to the right ADC. In all mono

mic modes, the same signal (MIC1, MIC2 or MIC1-MIC2) is routed to both the left and right

ADCs. See “Microphone Input” section for details.

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