WM8321 datasheet(200/253 Pages) WOLFSON

200 / 253 page

WM8321

Production Data

PD, February 2012, Rev 4.0

200

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

111 = SLEEP voltage / operating mode transition in

Timeslot 1

If DC-DC4 is assigned to a Hardware Enable Input,

then codes 001-101 select in which timeslot the

converter enters its SLEEP condition.

9:8

DC4_SLP_MO

DE [1:0]

DC-DC4 SLEEP Operating Mode

00 = Forced Continuous Conduction Mode

01 = Continuous / Discontinuous Conduction with

Pulse-Skipping

10 = LDO Mode

11 = Hysteretic Mode

6:0

DC4_SLP_VSE

L [6:0]

000_0000 DC-DC4 SLEEP Voltage select

0.85V to 3.4V in 25mV steps

00h = 0.85V

01h = 0.875V

…

65h = 3.375V

66h to 7Fh = 3.4V

DC4 SLEEP Control

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R16488

(4068h)

LDO1

Control

15:14

LDO1_ERR_A

CT [1:0]

LDO1 Error Action (Undervoltage)

00 = Ignore

01 = Shut down regulator

10 = Shut down system (Device Reset)

11 = Reserved

Note that an Interrupt is always raised.

12:11

LDO1_HWC_S

RC [1:0]

LDO1 Hardware Control Source

00 = Disabled

01 = Hardware Control 1

10 = Hardware Control 2

11 = Hardware Control 1 or 2

LDO1_HWC_V

SEL

LDO1 Hardware Control Voltage select

0 = Set by LDO1_ON_VSEL

1 = Set by LDO1_SLP_VSEL

9:8

LDO1_HWC_M

ODE [1:0]

LDO1 Hardware Control Operating Mode

00 = Low Power mode

01 = Turn converter off

10 = Low Power mode

11 = Set by LDO1_ON_MODE

LDO1_FLT

LDO1 Output float

0 = LDO1 output discharged when disabled

1 = LDO1 output floating when disabled

LDO1_SWI

LDO1 Switch Mode

0 = LDO mode

1 = Switch mode

LDO1_LP_MO

LDO1 Low Power Mode Select

0 = 50mA (reduced quiescent current)

1 = 20mA (minimum quiescent current)

Selects which Low Power mode is used in ON, SLEEP,

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