WM8994ECSSLASHR datasheet(151/363 Pages) CIRRUS

151 / 363 page

WM8994

Rev 4.6

151

GPIO FUNCTION SELECT

The available GPIO functions are described in Table 81. The function of each GPIO is set using the

GPn_FN register, where n identifies the GPIO pin (1 to 11). Note that the respective GPn_DIR must

also be set according to whether the function is an input or output.

Note that GPIO2 supports functions MCLK2 and Button Detect / Logic Level Input only.

GPn_FN

DESCRIPTION

COMMENTS

00h

GPIO1 - ADCLRCLK1

GPIO2 - MCLK2

GPIO3 - BCLK2

GPIO4 - LRCLK2

GPIO5 - DACDAT2

GPIO6 - ADCLRCLK2

GPIO7 - ADCDAT2

GPIO8 - DACDAT3

GPIO9 - ADCDAT3

GPIO10 - LRCLK3

GPIO11 - BCLK3

Alternate Audio Interface connections.

01h

Button detect input /

Logic level output

GPn_DIR = 0: GPIO pin logic level is set by GPn_LVL.

GPn_DIR = 1: Button detect or logic level input.

Note that GPIO2 can only be configured as an input.

02h

SDOUT

SPI Control Interface data output

03h

IRQ

Interrupt (IRQ) output

0 = IRQ not asserted

1 = IRQ asserted

04h

Temperature

(Shutdown) status

output

Indicates Temperature Shutdown Sensor status

0 = Temperature is below shutdown level

1 = Temperature is above shutdown level

05h

MICBIAS1 Current

Detect

Indicates MICBIAS1 Current Detection status

0 = Current Detect threshold not exceeded

1 = Current Detect threshold exceeded

06h

MICBIAS1 Short Circuit

Detect

Indicates MICBIAS1 Short Circuit Detection status

0 = Short Circuit threshold not exceeded

1 = Short Circuit threshold exceeded

07h

MICBIAS2 Current

Detect

Indicates MICBIAS2 Current Detection status

0 = Current Detect threshold not exceeded

1 = Current Detect threshold exceeded

08h

MICBIAS2 Short Circuit

Detect

Indicates MICBIAS2 Short Circuit Detection status

0 = Short Circuit threshold not exceeded

1 = Short Circuit threshold exceeded

09h

FLL1 Lock

Indicates FLL1 Lock status

0 = Not locked

1 = Locked

0Ah

FLL2 Lock

Indicates FLL2 Lock status

0 = Not locked

1 = Locked

0Bh

SRC1 Lock

Indicates SRC1 Lock status

0 = Not locked

1 = Locked

0Ch

SRC2 Lock

Indicates SRC2 Lock status

0 = Not locked

1 = Locked

WM8994ECS/R Datasheet(PDF) 151 Page - Cirrus Logic

WM8994ECS/R Datasheet(HTML) 151 Page - Cirrus Logic

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