WM8960CGEFLSLASHV datasheet(39/91 Pages) WOLFSON

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Production Data

WM8960

PD, October 2011, Rev 4.1

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R40 (28h)

Left Speaker

Volume

6:0

SPKLVOL

[6:0]

0000000

(MUTE)

SPK_LP/SPK_LN Volume

1111111 = +6dB

… 1dB steps down to

0110000 = -73dB

0101111 to 0000000 = Analogue MUTE

SPKLZC

Left Speaker Zero Cross Enable

1 = Change gain on zero cross only

0 = Change gain immediately

SPKVU

Speaker Volume Update

0 = Store SPKLVOL in intermediate latch

(no gain change)

1 = Update left and right channel gains

(left = SPKLVOL, right = intermediate

latch)

R41 (29h)

Right Speaker

Volume

6:0

SPKRVOL

[6:0]

0000000

(MUTE)

SPK_RP/SPK_RN Volume

1111111 = +6dB

… 1dB steps down to

0110000 = -73dB

0101111 to 0000000 = Analogue MUTE

SPKRZC

Right Speaker Zero Cross Enable

1 = Change gain on zero cross only

0 = Change gain immediately

SPKVU

Speaker Volume Update

0 = Store SPKRVOL in intermediate

latch (no gain change)

1 = Update left and right channel gains

(left = intermediate latch, right =

SPKRVOL)

R51 (33h)

Class D

Control (3)

5:3

DCGAIN

[2:0]

000

(1.0x)

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

2:0

ACGAIN

[2:0]

000

(1.0x)

AC Speaker Boost (Boosts speaker AC

output signal 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

Table 25 SPK_L/SPK_R Volume and Speaker Boost Control

To prevent pop noise, DCGAIN and ACGAIN should not be modified while the speaker outputs are

enabled.

To avoid clipping at speaker ground, ACGAIN should not be greater than DCGAIN.

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