WM8994 datasheet(147/359 Pages) WOLFSON

147 / 359 page

Production Data

WM8994

PD, April 2012, Rev 4.4

147

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R1793

(0701h)

GPIO2

GP2_DIR

GPIO2 Pin Direction

0 = Reserved

1 = Input

GP2_PU

GPIO2 Pull-Up Enable

0 = Disabled

1 = Enabled

GP2_PD

GPIO2 Pull-Down Enable

0 = Disabled

1 = Enabled

GP2_POL

GPIO2 Polarity Select

0 = Non-inverted (Active High)

1 = Inverted (Active Low)

GP2_DB

GPIO2 Input De-bounce

0 = Disabled

1 = Enabled

GP2_LVL

GPIO2 level. Read from this bit to

read GPIO input level.

4:0

GP2_FN [4:0]

0001

GPIO2 Pin Function

(see Table 81 for details)

Table 79 GPIO2 Control

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R1794

(0701h)

GPIO3

R1802

(070Ah)

GPIO11

GPn_DIR

GPIOn Pin Direction

0 = Output

1 = Input

GPn_PU

GPIOn Pull-Up Enable

0 = Disabled

1 = Enabled

GPn_PD

GPIOn Pull-Down Enable

0 = Disabled

1 = Enabled

GPn_POL

GPIOn Polarity Select

0 = Non-inverted (Active High)

1 = Inverted (Active Low)

GPn_OP_CFG

GPIOn Output Configuration

0 = CMOS

1 = Open Drain

GPn_DB

GPIOn Input De-bounce

0 = Disabled

1 = Enabled

GPn_LVL

GPIOn level. Write to this bit to set

a GPIO output. Read from this bit to

read GPIO input level.

For output functions only, when

GPn_POL is set, the register

contains the opposite logic level to

the external pin.

4:0

GPn_FN [4:0]

0001

GPIOn Pin Function

(see Table 81 for details)

Note: n is a number between 3 and 11 that identifies the individual GPIO.

Table 80 GPIO3 to GPIO11 Control

WM8994 Datasheet(PDF) 147 Page - Wolfson Microelectronics plc

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