WM8321 datasheet(169/253 Pages) WOLFSON

169 / 253 page

Production Data

WM8321

PD, February 2012, Rev 4.0

169

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

3:0

GP1_FN [3:0]

0000

GPIO1 Pin Function

Input functions:

0 = GPIO input (long de-bounce)

1 = GPIO input

2 = Power On/Off request

3 = Sleep/Wake request

4 = Sleep/Wake request (long de-bounce)

5 = Sleep request

6 = Power On request

7 = Watchdog Reset input

8 = DVS1 input

9 = DVS2 input

10 = HW Enable1 input

11 = HW Enable2 input

12 = HW Control1 input

13 = HW Control2 input

14 = HW Control1 input (long de-bounce)

15 = HW Control2 input (long de-bounce)

Output functions:

0 = GPIO output

1 = 32.768kHz oscillator output

2 = ON state

3 = SLEEP state

4 = Power State Change

5 = Reserved

6 = Reserved

7 = Reserved

8 = DC-DC1 DVS Done

9 = DC-DC2 DVS Done

10 = External Power Enable1

11 = External Power Enable2

12 = System Supply Good (SYSOK)

13 = Converter Power Good (PWR_GOOD)

14 = External Power Clock (2MHz)

15 = Auxiliary Reset

GPIO1 Control

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R16441

(4039h)

GPIO2

Control

GP2_DIR

GPIO2 pin direction

0 = Output

1 = Input

14:13

GP2_PULL

[1:0]

GPIO2 Pull-Up / Pull-Down configuration

00 = No pull resistor

01 = Pull-down enabled

10 = Pull-up enabled

11 = Reserved

GP2_INT_MOD

GPIO2 Interrupt Mode

0 = GPIO interrupt is rising edge triggered (if

GP2_POL=1) or falling edge triggered (if GP2_POL=0)

1 = GPIO interrupt is triggered on rising and falling

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