WM8311 datasheet(241/302 Pages) WOLFSON

241 / 302 page

Pre-Production

WM8311

PP, May 2012, Rev 3.1

241

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

LDO2_UV_ST

LDO2 Undervoltage Status

0 = Normal

1 = Undervoltage

LDO1_UV_ST

LDO1 Undervoltage Status

0 = Normal

1 = Undervoltage

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R16470

(4056h) DC1

Control 1

15:14

DC1_RATE

[1:0]

DC-DC1 Voltage Ramp rate

00 = 1 step every 32us

01 = 1 step every 16us

10 = 1 step every 8us

11 = Immediate voltage change

DC1_PHASE

DC-DC1 Clock Phase Control

0 = Normal

1 = Inverted

9:8

DC1_FREQ

[1:0]

DC-DC1 Switching Frequency

00 = Reserved

01 = 2.0MHz

10 = Reserved

11 = 4.0MHz

DC1_FLT

DC-DC1 Output float

0 = DC-DC1 output discharged when disabled

1 = DC-DC1 output floating when disabled

5:4

DC1_SOFT_ST

ART [1:0]

DC-DC1 Soft-Start Control

(Duration in each of the 8 startup current limiting steps.)

00 = 32us steps

01 = 64us steps

10 = 128us steps

11 = 256us steps

1:0

DC1_CAP [1:0]

DC-DC1 Output Capacitor

00 = 4.7uF to 20uF

01 = Reserved

10 = 22uF to 47uF

11 = Reserved

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R16471

(4057h) DC1

Control 2

15:14

DC1_ERR_AC

T [1:0]

DC-DC1 Error Action (Undervoltage)

00 = Ignore

01 = Shut down converter

10 = Shut down system (Device Reset)

11 = Reserved

Note that an Interrupt is always raised.

WM8311 Datasheet(PDF) 241 Page - Wolfson Microelectronics plc

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