WM9713 datasheet(38/111 Pages) WOLFSON

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WM9713L

Preliminary Technical Data

PTD, March 2004, Rev 2.2

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

3Ch

Powerdown (1)

VXDAC

VXDAC powerdown bit

1: OFF, 0: ON

V2H

Mute VXDAC path to headphone

mixer

1: Mute, 0: No mute (ON)

14:12

V2HVOL

010

(0dB)

VXDAC to headphone mixer gain

000: +6dB

… (3dB steps)

111: -15dB

V2S

Mute VXDAC path to speaker mixer

1: Mute, 0: No mute (ON)

10:8

V2SVOL

010

(0dB)

VXDAC to speaker mixer gain

000: +6dB

… (3dB steps)

111: -15dB

V2M

Mute VXDAC path to mono mixer

1: Mute, 0: No mute (ON)

18h

VXDAC Output

Control

6:4

V2MVOL

010

(0dB)

VXDAC to mono mixer gain

000: +6dB

… (3dB steps)

111: -15dB

Table 18 VXDAC Control

AUXILIARY DAC

AUXDAC is a simple 12-bit mono DAC. It can be used to generate DC signals (with the numeric input

written into a control register), or AC signals such as telephone-quality ring tones or system beeps

(with the input signal supplied through an AC-Link slot). In AC mode (XSLE = 1), the input data is

binary offset coded; in DC mode (XSLE = 0), there is no offset.

The analogue output of AUXDAC is routed directly into the output mixers. The signal gain into each

mixer can be adjusted at the mixer inputs using control register 12h. In slot mode (XSLE = 1), the

AUXDAC also supports variable sample rates (See “Variable Rate Audio” section).

When not in use the auxillary DAC can be powered down using the Powerdown register bit AUXDAC

(register 3Ch, bit 11).

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