Wolfson WM832 Series Setup Manual Download Page 1

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WAN_0264

WM832x Customer Evaluation System Set-up Guide 

 

WOLFSON MICROELECTRONICS plc

 

 

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September 2011, Rev 1.0

Copyright 

2011 Wolfson Microelectronics plc

 

INTRODUCTION 

This document is designed to help users setting up the WM832x customer evaluation system. 

This document relates to the WM8321, WM8325 and WM8326 Power Management ICs. 

 

MAIN BOARD FEATURES 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bench

 

Power

 

Supply

 

for

 

DBVDD

 

power

 

+1.62V

 

to

 

+3.6V

 

DC-DC1, 2, 3&4 Outputs 
& Source Selection 

ICE

 ‐

InstantConfig™

EEPROM

 

circuit

 

External

 

PC

 

USB

 

Interface

GPIO

 

Interface

 

LDO7

 

to

 

LDO13:

 

Outputs

 

&

 

Source

 

Selection

 

On

 

Button

 

PVDD:

 

Main

 

Power

 

Input

 

+2.7V

 

to

 

+5.5V

 

LDO4,

 

5&6:

 

Output

 

&

 

Source

 

Selection

  

Mini

 

board

 

WM832x

6246

FL81

M

REV1

 

Containing

 

WM832x

 

device

 

and

 

associated

 

external

 

GPIO

 

interface

 

LDO1,

 

2&3:

  

Outputs

 

&

 

Source

 

Selection

 

DBVDD

 

Source

 

Selection

 

Backup

 

Battery

 

Supply

+1.5V

 

to

 

+3.6V

 

PVDD

 

Selection:

 

USB

 

or

 

Bench

 

Summary of Contents for WM832 Series

Page 1: ...M8321 WM8325 and WM8326 Power Management ICs MAIN BOARD FEATURES Bench Power Supply for DBVDD power 1 62V to 3 6V DC DC1 2 3 4 Outputs Source Selection ICE InstantConfig EEPROM circuit External PC USB...

Page 2: ...DC converters is 2 5A therefore extra care should be taken when evaluating those DC DC converters at full load The 2 5A DC DC converter power sources and respective loads should be connected directly...

Page 3: ...es the ICE settings into the WM832x register map and applies them during the start up sequence The ICE can be programmed using WISCE TM See section How to program the ICE using WISCE TM ICE HARDWARE S...

Page 4: ...BLE ONLY EXAMPLE POWERING ONLY FROM A PC USB CABLE J12 Selects the supply for the auxiliary circuits PC USB or 5V from J9 The selection of the USB power is done by J80 If J80 1 2 PVDD 5V from PC USB I...

Page 5: ...aximum current capability is 2 5A Therefore it is recommended to remove jumpers J18 and or J19 to isolate the mini board DCmVDD from the mother board DCmVDD Power to the DC DC1 and or DC DC2 Converter...

Page 6: ...he OFF power state then the RESET pin is pulled low When RESET is de asserted for example when the WM832x moves to the ON power state then the RESET is pulled up to DBVDD The ON pin is pulled up to LD...

Page 7: ...ndicates the main device Power States via RESET assertion and de assertion LED1 can assist in a debug situation where the device is not set up to indicate the current status in any other way LED1 ON O...

Page 8: ...WAN_0264 Customer Information w September 2011 Rev 1 0 Customer Information 8 CONTROL INTERFACE CIF MODE Control Interface Mode selects between 2 wire I2C mode and 4 wire SPI mode CIFMODE CIF_MODE...

Page 9: ...et the EVB as shown in section 4 To start full communications with the device the DBVDD must power up when the ON key is pressed So DBVDD must come from one of the device on board regulators i e LDO7...

Page 10: ...ould be written to the Security register STATUS LED1 AND LED2 STATUS LED1 AND LED2 SET UP The WM832x provides two System Status LED drivers These are digital outputs intended for driving LEDs directly...

Page 11: ...lso be used to trigger Interrupts The function of each GPIO pin is selected individually Different voltage power domains are selectable on a pin by pin basis for GPIO 1 12 Input de bounce is automatic...

Page 12: ...te transition momentarily press and hold SW2 push button for 1 second default OFF Power state transition press and hold SW2 push button for 8 seconds default SLEEP Power state transition register writ...

Page 13: ...ge then select the appropriate register bit field LDO1_ON_VSEL R08h bits 0 4 Move the slider to the new voltage setting and then use the WRITE button to write the new value to that register if this is...

Page 14: ...bits 4 The DBE_VALID_DATA field R2Eh register should contain the value A596h for the ICE data to be deemed valid 5 Finally Write each register values to program the ICE After the desired register sett...

Page 15: ...formation 15 TECHNICAL SUPPORT If you require more information or require technical support please contact the nearest Wolfson Microelectronics regional office http www wolfsonmicro com contact or one...

Page 16: ...es nuclear systems or systems where malfunction can reasonably be expected to result in personal injury death or severe property or environmental damage Any use of products by the customer for such pu...

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