WM8960CGEFL/2RV Ver la hoja de datos (PDF) - Wolfson Microelectronics plc

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WM8960CGEFL/2RV

Stereo CODEC with 1W Stereo Class D Speaker Drivers and Headphone Drivers for Portable Audio Applications

Wolfson Microelectronics plc 

WM8960

Production Data

REGISTER

ADDRESS

R2 (02h)

LOUT1

Volume

BIT

LABEL

8

OUT1VU

7

LO1ZC

6:0 LOUT1VOL

[6:0]

R3 (03h)

ROUT1

Volume

8

OUT1VU

7

RO1ZC

6:0 ROUT1VOL

[6:0]

Table 24 LOUT1/ROUT1 Volume Control

DEFAULT

DESCRIPTION

0

0

0000000

(MUTE)

0

0

0000000

(MUTE)

Headphone Volume Update

0 = Store LOUT1VOL in intermediate

latch (no gain change)

1 = Update left and right channel gains

(left = LOUT1VOL, right = intermediate

latch)

Left zero cross enable

0 = Change gain immediately

1 = Change gain on zero cross only

LOUT1 Volume

1111111 = +6dB

… 1dB steps down to

0110000 = -73dB

0101111 to 0000000 = Analogue

MUTE

Headphone Volume Update

0 = Store ROUT1VOL in intermediate

latch (no gain change)

1 = Update left and right channel gains

(left = intermediate latch, right =

ROUT1VOL)

Right zero cross enable

0 = Change gain immediately

1 = Change gain on zero cross only

ROUT1 Volume

Similar to LOUT1VOL

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 Speaker Output section). 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.

Figure 14 Speaker Boost Operation

w

PD, August 2013, Rev 4.2

38

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