WM8311 datasheet(84/302 Pages) WOLFSON

84 / 302 page

WM8311

Pre-Production

PP, May 2012, Rev 3.1

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

3:2

DC4_RANG

E[1:0]

Selects the voltage range for DC-DC4

00 = 20V < VOUT <= 30V

01 = 10V < VOUT <= 20V

10 = 6.5V < VOUT <= 10V

11 = Reserved

Protected by user key

DC4_FBSRC

DC-DC4 Voltage Feedback source

0 = ISINK1

1 = ISINK2

R16485 (4065h)

DC4 SLEEP

Control

DC4_SLPEN

DC-DC4 SLEEP Enable

0 = Disabled

1 = Controlled by DC4_ENA

Table 37 DC-DC (Boost) Converter Control

15.12.4 LDO REGULATOR CONTROL

The register controls for configuring the LDO Regulators 1-5 are defined in Table 38.

Note that the LDOn_ON_SLOT and LDOn_ON_VSEL fields may also be stored in the integrated OTP

memory. See Section 14 for details.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R16488 (4068h)

LDO1 Control

15:14

LDO1_ERR_

ACT [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

_SRC [1:0]

LDO1 Hardware Control Source

00 = Disabled

01 = Hardware Control 1

10 = Hardware Control 2

11 = Hardware Control 1 or 2

LDO1_HWC

_VSEL

LDO1 Hardware Control Voltage select

0 = Set by LDO1_ON_VSEL

1 = Set by LDO1_SLP_VSEL

9:8

LDO1_HWC

_MODE

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_M

ODE

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, or under HWC modes.

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