WM8321 datasheet(236/253 Pages) CIRRUS

236 / 253 page

WM8321

Production Data

PD, February 2012, Rev 4.0

236

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

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

XTAL_ENA

Crystal Oscillator Enable

0 = Disabled at all times

1 = Enabled in OFF, ON, SLEEP states

(Note that the BACKUP behaviour is determined by

XTAL_BKUPENA.)

This field can only be written to by loading configuration

settings from OTP/ICE. In all other cases, this field is

Read Only.

XTAL_INH

Crystal Start-Up Inhibit

0 = Disabled

1 = Enabled

When XTAL_INH=0, the internal RC oscillator will

provide CLKOUT until the crystal oscillator is valid.

When XTAL_INH=1, the ‘ON’ transition is inhibited until

the crystal oscillator is valid.

GPIO1 OTP Control

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R30747

(781Bh)

GPIO2 OTP

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

edges

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