WM8960CGEFLSLASHV datasheet(41/94 Pages) CIRRUS

41 / 94 page

WM8960

Rev 4.4

See "Volume Updates" for more information on volume update bits, zero cross and timeout operation.

CLASS D SPEAKER OUTPUTS

The SPK_LP/SPK_LN and SPK_RP/SPK_RN output pins are class D speaker drivers. Each pair is

independently controlled and can drive an 8

 BTL speaker (see “Class D Speaker Outputs”). Output

mixer volume is relative to AVDD, while an additional boost stage is available to accommodate higher

SPKVDD1/SPKVDD2 supply voltages. This allows AVDD to be run at a lower voltage to save power,

while maximum output power can be delivered to the load, utilising the full range of

SPKVDD1/SPKVDD2. Note that the BTL speaker connection provides an additional +6dB gain at the

output.

SPK_LP/

SPK_RP

SPK_LN/

SPK_RN

SPKLVOL[6:0]

SPKRVOL[6:0]

LEFT OR RIGHT

OUTPUT MIXER

ACGAIN[2:0]

SPKGND1=SPKGND2

SPKVDD1=SPKVDD2

AGND

AVDD

DCGAIN[2:0] or ACGAIN[2:0]

000 = 1.00x

001 = 1.27x

010 = 1.40x

011 = 1.52x

100 = 1.67x

101 = 1.80x

VMID

AVDD

AGND

DCGAIN[2:0]

VMID x DCGAIN

SPKVDD1/SPKVDD2

Signal x ACGAIN

BTL Connection

provides an

additional 6dB gain

Figure 14 Speaker Boost Operation

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

WM8960CGEFL/V Datasheet(PDF) 41 Page - Cirrus Logic

WM8960CGEFL/V Datasheet(HTML) 41 Page - Cirrus Logic

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