WM8993 datasheet(105/229 Pages) WOLFSON

105 / 229 page

Production Data

WM8993

PD, November 2010, Rev 4.0

105

The temperature sensor must be enabled by setting the TSHUT_ENA register bit. When the

TSHUT_OPDIS is also set, then a device over-temperature condition will cause the speaker outputs

(SPKOUTL and SPKOUTR) of the WM8993 to be disabled.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R2 (02h)

Power

Management

(2)

TSHUT_EN

Thermal sensor enable

0 = disabled

1 = enabled

TSHUT_OP

DIS

Thermal shutdown control

(Causes audio outputs to be disabled if an

overtemperature occurs. The thermal sensor

must also be enabled.)

0 = disabled

1 = enabled

R18 (12h)

GPIO CTRL

TEMPOK_EI

Temp OK interrupt

0 = interrupt not set

1 = interrupt is set

Cleared when a ‘1’ is written

R20 (14h)

IRQ_DEBOU

NCE

TEMPOK_D

Temp OK de-bounce

0 = disabled

1 = enabled

R22 (16h)

GPIOCTRL2

IM_TEMPO

K_EINT

Temp OK interrupt mask

0 = do not mask interrupt

1 = mask interrupt

R23 (17h)

GPIO_POL

TEMPOK_P

Temp OK interrupt polarity

0 = active high (interrupt is triggered when

temperature is normal)

1 = active low (interrupt is triggered when

over-temperature)

Table 69 Temperature Sensor Enable and Interrupt Control

The Temperature Sensor output is asserted when the device is within normal operating limits. When

configured to generate an interrupt event, the default value of TEMPOK_POL will cause an interrupt

event when an overtemperature condition has been reached.

When GPIO1_SEL = 0101, the Temperature Sensor status is output on the GPIO1 pin. A logic 0

indicates that an overtemperature condition has been reached. Note that the polarity is not

programmable for GPIO output; the GPIO1_POL and TEMPOK_POL fields affect the Interrupt

behaviour only.

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