WM1811A datasheet(141/328 Pages) WOLFSON

141 / 328 page

Production Data

WM1811A

PD, November 2013, Rev 4.1

141

The register fields that control the GPIO pins are described inTable 79.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R1792

(0700h)

GPIO1

R1799

(0707h)

GPIO8

R1802

(070Ah)

GPIO11

GPn_DIR

GPIOn Pin Direction

0 = Output

1 = Input

GPn_PU

GPIOnPull-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]

GPIOn Pin Function

(see Table 80 for details)

GP1_FN default = 0000

GP8_FN default = 0001

GP9_FN default = 0001

GP10_FN default = 0001

GP11_FN default = 0001

Note:n is a number (1, 8, 9, 10, 11) that identifies the individual GPIO.

Table 79 GPIO1, GPIO8, GPIO9, GPIO10 to GPIO11 Control

GPIO FUNCTION SELECT

The available GPIO functions are described in Table 80. The function of each GPIO is set using the

GPn_FN register, where n identifies the GPIO pin (1, 8, 9, 10, 11). Note that the respective GPn_DIR

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

GPn_FN

DESCRIPTION

COMMENTS

00h

GPIO1 - ADCLRCLK1

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.

02h

Reserved

WM1811A Datasheet(PDF) 141 Page - Wolfson Microelectronics plc

WM1811A Datasheet(HTML) 141 Page - Wolfson Microelectronics plc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL