WM8325 datasheet(254/254 Pages) WOLFSON

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WM8325

Production Data

PD, February 2012, Rev 4.0

254

33 REVISION HISTORY

DATE

REV

DESCRIPTION OF CHANGES

CHANGED

18/08/11

1.0

Initial Release

January 2011

1.1

SDOUT1 description amended to Open Drain, with external pull-up required.

Default value of PWRSTATE_DLY corrected.

Alternative 2.2uH recommended inductor quoted for DC-DC2.

Undervoltage margin specified for all DC-DC converters.

Overvoltage margin specified for DC-DC converters 1, 2.

Chip Temperature (AUX_DATA) equation updated.

01/03/11

1.2

Added notes that SLEEP > OFF is not a controlled transition; converters and

regulators are disabled immediately.

RESET pin description updated to note integrated pull-up.

IRQ description updated to note pull-up in Open Drain mode.

System Reset and Device Reset descriptions updated, consistent with the

Summary Table.

Recommended external pull-up resistances added in Pin Description.

Internal pull-up / pull-down resistances added in Electrical Characteristics.

Noted Active High (non-inverted) polarity for GPIO “Power On/Off request”

function is not fully supported in development mode.

24/06/11

3.0

Noted maximum limit on Software Resets. Also clarification of the maximum

number of Watchdog / Undervoltage Device Resets.

Correction to DBVDD test conditions (Section 7.7).

RTC_PINT_FREQ definition updated.

DC-DC output inductor saturation limit recommendations added.

DC-DC2 output current characteristics updated - 1250mA max in 4MHz mode.

SYSOK_THR register description updated.

Quiescent current characteristics updated for DC-DC 1-4.

15/09/11

4.0

Backup battery power updated; Charger control registers deleted.

LDO11 output amended for LDO11_VSEL_SRC=1 and DC-DC1 disabled.

OTP Register Map overview correction (GPn_TRI replaced with GPn_ENA).

LDO11 maximum output current increased (only for PVDD ≥ 3.1V).

01/02/12

4.0

Electrical Characteristics updated.

DC3_STNBY_LIM, DC4_STNBY_LIM descriptions updated.

SYSOK_THR description updated.

WM8325 Datasheet(PDF) 254 Page - Wolfson Microelectronics plc

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