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Wolfson WM832 Series, Руководство по установке

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Customer Information 

                                                                                                                                  

WAN_0264

  

 

w

 

 

 

September 2011, Rev 1.0 

 

Customer Information 

5

 

 

 

USING THE WM8325 AND WM8326 EVB 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WM8325 DC-DC2 and WM8326 DC-DC1&2 Converters maximum 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 Converters should be directly applied to the appropriate 
TPDCmVDD test points on the mini-boards, with their associated grounds 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J18

 

DC1VDD_SEL

 

J19

 

DC2VDD_SEL

 

J18

J19

Содержание WM832 Series

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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