WM8960 datasheet(46/92 Pages) WOLFSON

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WM8960

Production Data

PD, August 2013, Rev 4.2

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R27 (1Bh)

Additional

Control (3)

OUT3CAP

Capless Mode Headphone Switch

Enable

0 = OUT3 unaffected by jack detect

events

1 = OUT3 enabled and disabled together

with HP_L and HP_R in response to jack

detect events

R48 (30h)

Additional

Control (4)

3:2

HPSEL[1:0]

Headphone Switch Input Select

0X = GPIO1 used for jack detect input

(Requires ADCLRC pin to be configured

as a GPIO)

10 = JD2 used for jack detect input

11 = JD3 used for jack detect input

R23 (17h)

Additional

Control (1)

TOEN

Slow Clock Enable (Must be enabled for

jack detect de-bounce)

0 = Slow Clock Disabled

1 = Slow Clock Enabled

TOCLKSEL

Slow Clock Selection (Used for volume

update timeouts and for jack detect

debounce)

0 = SYSCLK / 2

21 (Slower Response)

1 = SYSCLK / 2

19 (Faster Response)

Table 30 Headphone Jack Detect

Figure 20 Example Headset Detection Circuit Using Normally-Open Switch

Figure 21 Example Headset Detection Circuit Using Normally-Closed Switch

THERMAL SHUTDOWN

The speaker and headphone outputs can drive very large currents. To protect the WM8960 from

overheating a thermal shutdown circuit is included and is enabled by default. If the device

temperature reaches approximately 150

0C and the thermal shutdown circuit is enabled (TSDEN = 1;

TSENSEN = 1) the speaker and headphone amplifiers (HP_L, HP_R, SPK_LP, SPK_LN, SPK_RP,

SPK_RN and OUT3) will be disabled. This feature can be disabled to save power when the device is

in standby mode.

TSENSEN must be set to 1 to enable the temperature sensor when using the TSDEN thermal

shutdown function. The output of the temperature sensor can also be output to the GPIO1 pin.

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