WM8956 datasheet(71/80 Pages) WOLFSON

71 / 80 page

Preliminary Technical Data

WM8956

PTD, July 2007, Rev 2.1

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

RMIC

Right Channel Input PGA Enable

0 = PGA disabled

1 = PGA enabled (if AINR = 1)

Input Signal

Path

LOMIX

Left Output Mixer Enable Control

0 = Disabled

1 = Enabled

Output Signal

Path

ROMIX

Right Output Mixer Enable Control

0 = Disabled

1 = Enabled

Output Signal

Path

1:0

Reserved

GPIOPOL

GPIO Polarity Invert

0 = Non inverted

1 = Inverted

General

Purpose Input /

Output

6:4

GPIOSEL[2:0]

000

GPIO1 GPIO Function Select:

000 = Jack detect input

001 = Reserved

010 = Temperature ok

011 = Debounced jack detect output

100 = SYSCLK output

101 = PLL lock

110 = Logic 0

111 = Logic 1

General

Purpose Input /

Output

3:2

HPSEL[1:0]

Headphone Switch Input Select

0X = GPIO1 used for jack detect input (Requires

pin to be configured as a GPIO using

ALRCGPIO)

10 = JD2 used for jack detect input

11 = JD3 used for jack detect input

Headphone

Jack Detect

TSENSEN

Temperature Sensor Enable

0 = Temperature sensor disabled

1 = Temperature sensor enabled

Thermal

Shutdown

R48 (30h)

Additional

Control (4)

MBSEL

Microphone Bias Voltage Control

0 = 0.9 * AVDD

1 = 0.65 * AVDD

Input Signal

Path

Reserved

7:6

SPK_OP_EN[1:0]

Enable Class D Speaker Outputs

00 = Off

01 = Left speaker only

10 = Right speaker only

11 = Left and right speakers enabled

Enabling the

Outputs

R49 (31h)

Class D

Control (1)

5:0

110111

Reserved

R50 (32h)

8:0

001001101

Reserved

8:6

010

Reserved

R51 (33h)

Class D

Control (2)

5:3

DCGAIN[2:0]

000

DC Speaker Boost (Boosts speaker DC output

level by up to 1.8 x on left and right channels)

000 = 1.00x boost (+0dB)

001 = 1.27x boost (+2.1dB)

010 = 1.40x boost (+2.9dB)

011 = 1.52x boost (+3.6dB)

100 = 1.67x boost (+4.5dB)

101 = 1.8x boost (+5.1dB)

110 to 111 = Reserved

Analogue

Outputs

WM8956 Datasheet(PDF) 71 Page - Wolfson Microelectronics plc

WM8956 Datasheet(HTML) 71 Page - Wolfson Microelectronics plc

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