WM8321 datasheet(195/253 Pages) WOLFSON

195 / 253 page

Production Data

WM8321

PD, February 2012, Rev 4.0

195

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R16479

(405Fh)

DC2 DVS

Control

12:11

DC2_DVS_SR

C [1:0]

DC-DC2 DVS Control Source

00 = Disabled

01 = Enabled

10 = Controlled by Hardware DVS1

11 = Controlled by Hardware DVS2

6:0

DC2_DVS_VS

EL [6:0]

000_0000 DC-DC2 DVS Voltage select

0.6V to 1.8V in 12.5mV steps

00h to 08h = 0.6V

09h = 0.6125V

…

48h = 1.4V (see note)

…

67h = 1.7875V

68h to 7Fh = 1.8V

Note - Maximum output voltage selection in 4MHz

switching mode is 48h (1.4V).

DC2 DVS Control

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R16480

(4060h) DC3

Control 1

DC3_PHASE

DC-DC3 Clock Phase Control

0 = Normal

1 = Inverted

DC3_FLT

DC-DC3 Output float

0 = DC-DC3 output discharged when disabled

1 = DC-DC3 output floating when disabled

5:4

DC3_SOFT_ST

ART [1:0]

DC-DC3 Soft-Start Control

(Duration in each of the 3 intermediate startup current

limiting steps.)

00 = Immediate start-up

01 = 512us steps

10 = 4.096ms steps

11 = 32.768ms steps

3:2

DC3_STNBY_L

IM [1:0]

DC-DC3 Current Limit

Sets the maximum DC output current in Hysteretic

Mode.

00 = 50mA

01 = 100mA

10 = 200mA

11 = 400mA

Protected by security key.

1:0

DC3_CAP [1:0]

DC-DC3 Output Capacitor

00 = 10uF to 20uF

01 = 10uF to 20uF

10 = 22uF to 45uF

11 = 47uF to 100uF

This field can only be written to by loading configuration

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

Read Only.

DC3 Control 1

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