WM9713 datasheet(51/111 Pages) WOLFSON

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Preliminary Technical Data

WM9713L

PTD, March 2004, Rev 2.2

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

MUL

1 (Mute)

Mute HPL

1: Mute (OFF)

0: No Mute (ON)

ZCL

Left zero cross enable

0: Change gain immediately

1: Change gain only on zero crossings,

or after time-out

13:8

HPLVOL

000000

(0dB)

HPL Volume

000000: 0dB (maximum)

000001: -1.5dB

… (1.5dB steps)

011111: -46.5dB

1xxxxx: -46.5dB

MUR

1 (Mute)

Mute HPR

1: Mute (OFF)

0: No Mute (ON)

ZCR

Right zero cross enable

0: Change gain immediately

1: Change gain only on zero crossings,

or after time-out

04h

Headphone

Volume

5:0

HPRVOL

00000

(0dB)

HPR Volume

Similar to HPLVOL

Table 32 HPL / HPR PGA Control

MONO OUTPUT

The MONO output (pin 31) is designed to drive a 16

Ω headphone load and can also be used as a

line outputs. The available input sources are MONOMIX, INV1 and Vmid (see Table 33)

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

1Ch

Output PGA

Mux Select

15:14

MONO

00 (Vmid)

MONO input source select

00: Vmid

01: no i/p (ZH if buffer disabled)

10: MONOMIX

11: INV1

Table 33 MONO PGA Input Source

The signal volume on MONO can be independently adjusted under software control by writing to

When not in use MONO can be powered down using the Powerdown register bit MONO (register

3Eh, bit 13). To minimise pops and clicks when the PGA is powered down / up it is recommended

that the Vmid input is selected during the power down / up cycle. This ensures the same DC level is

maintained on the output pin throughout.

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