WM8986GECOSLASHV datasheet(59/87 Pages) WOLFSON

59 / 87 page

Pre-Production

WM8986

PP, Rev 3.1, February 2007

GENERAL PURPOSE INPUT/OUTPUT

The WM8986 has one dual purpose input/output pin, CSB/GPIO1.

The GPIO1 function is provided for use as jack detection input or general purpose output.

The default configuration for the CSB/GPIO1 is to be an input.

When setup as an input, the CSB/GPIO1 pin can either be used as CSB or for jack detection,

depending on how the MODE pin is set.

Table 34 illustrates the functionality of the GPIO1 pin when used as a general purpose output.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

2:0

GPIO1SEL

000

CSB/GPIO1 pin function select:

000 = input (CSB / Jack detection:

depending on MODE setting)

001 = reserved

010 = Temp ok

011 = Amute active

100 = PLL clk output

101 = PLL lock

110 = logic 0

111 = logic 1

GPIO1POL

GPIO1 Polarity invert

0 = Non inverted

1 = Inverted

5:4

OPCLKDIV

PLL Output clock division ratio

00 = divide by 1

01 = divide by 2

10 = divide by 3

11 = divide by 4

GPIO1GPD

GPIO1 Internal pull-down enable:

0 = Internal pull-down disabled

1 = Internal pull-down enabled

GPIO1GPU

GPIO1 Internal pull-up enable:

0 = Internal pull-up disabled

1 = Internal pull-up enabled

R8 (08h)

GPIO

Control

GPIO1GP

GPIO1 Open drain enable

0 = Open drain disabled

1 = Open drain enabled

Table 34 CSB/GPIO Control

Note:

If MODE is set to 3 wire mode, CSB/GPIO1 is used as CSB input irrespective of the

GPIO1SEL[2:0] bits.

WM8986GECO/V Datasheet(PDF) 59 Page - Wolfson Microelectronics plc

WM8986GECO/V Datasheet(HTML) 59 Page - Wolfson Microelectronics plc

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