WM8310 datasheet(170/291 Pages) WOLFSON

170 / 291 page

WM8310

Pre-Production

PP, May 2012, Rev 3.1

170

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R16386

(4002h)

Thermal

Monitoring

THW_HYST

Thermal Warning hysteresis

0 = 8 degrees C

1 = 16 degrees C

1:0

THW_TEMP

[1:0]

Thermal Warning temperature

00 = 90 degrees C

01 = 100 degrees C

10 = 110 degrees C

11 = 120 degrees C

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R16387

(4003h)

Power State

CHIP_ON

Indicates whether the system is ON or OFF.

0 = OFF

1 = ON (or SLEEP)

OFF can be commanded by writing CHIP_ON = 0.

Note that writing CHIP_ON = 1 is not a valid ‘ON’ event,

and will not trigger an ON transition.

CHIP_SLP

Indicates whether the system is in the SLEEP state.

0 = Not in SLEEP

1 = SLEEP

WAKE can be commanded by writing CHIP_SLP = 0.

SLEEP can be commanded by writing CHIP_SLP = 1.

REF_LP

Low Power Voltage Reference Control

0 = Normal

1 = Low Power Reference Mode select

Note that Low Power Reference Mode is only supported

when the Auxiliary ADC is disabled.

11:10

PWRSTATE_D

LY [1:0]

Power State transition delay

00 = No delay

01 = No delay

10 = 1ms

11 = 10ms

SWRST_DLY

Software Reset Delay

0 = No delay

1 = Software Reset is delayed by PWRSTATE_DLY

following the Software Reset command

5:4

USB100MA_S

TARTUP [1:0]

Sets the device behaviour when starting up under USB

power, when USB_ILIM = 010b (100mA)

00 = Normal

01 = Soft-Start

10 = Only start if BATTVDD > 3.1V

11 = Only start if BATTVDD > 3.4V

In the 1X modes, if the battery voltage is less than the

selected threshold, then the device will enable trickle

charge mode instead of executing the start-up request.

The start-up request is delayed until the battery voltage

threshold has been met.

USB_CURR_S

Indicates if the USB current limit has been reached

0 = Normal

1 = USB current limit

WM8310 Datasheet(PDF) 170 Page - Wolfson Microelectronics plc

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