EFM32WG Datasheet, PDF(116/834 Page) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

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EFM32WG Datasheet, PDF (116/834 Pages) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

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10.4 Register Map

...the world's most energy friendly microcontrollers

The offset register address is relative to the registers base address.

Offset

0x000

0x008

0x024

0x02C

0x030

0x034

0x038

0x03C

0x040

0x044

0x048

0x04C

0x050

0x054

0x058

0x05C

Name

EMU_CTRL

EMU_LOCK

EMU_AUXCTRL

EMU_EM4CONF

EMU_BUCTRL

EMU_PWRCONF

EMU_BUINACT

EMU_BUACT

EMU_STATUS

EMU_ROUTE

EMU_IF

EMU_IFS

EMU_IFC

EMU_IEN

EMU_BUBODBUVINCAL

EMU_BUBODUNREGCAL

Type

RW

RW

RW

RW

RW

RW

RW

RW

R

RW

R

W1

W1

RW

RW

RW

Description

Control Register

Configuration Lock Register

Auxiliary Control Register

Energy mode 4 configuration register

Backup Power configuration register

Power connection configuration register

Backup mode inactive configuration register

Backup mode active configuration register

Status register

I/O Routing Register

Interrupt Flag Register

Interrupt Flag Set Register

Interrupt Flag Clear Register

Interrupt Enable Register

BU_VIN Backup BOD calibration

Unregulated power Backup BOD calibration

10.5 Register Description

10.5.1 EMU_CTRL - Control Register

Offset

0x000

Reset

Access

Bit Position

Name

Bit

31:4

3:2

1

0

Name

Reset

Access Description

Reserved

To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)

EM4CTRL

0x0

RW

Energy Mode 4 Control

This register is used to enter Energy Mode 4, in which the device only wakes up from an external pin reset, from a power cycle,

Backup RTC interrupt, or EM4 wakeup reset request. Energy Mode 4 is entered when the EM4 sequence is written to this bitfield.

EM2BLOCK

0

RW

Energy Mode 2 Block

This bit is used to prevent the MCU to enter Energy Mode 2 or lower.

EMVREG

0

RW

Energy Mode Voltage Regulator Control

Control the voltage regulator in low energy modes 2 and 3.

Value

0

1

Mode

REDUCED

FULL

Description

Reduced voltage regulator drive strength in EM2 and EM3.

Full voltage regulator drive strength in EM2 and EM3.

2013-05-08 - Wonder Gecko Family - d0233_Rev0.50

116

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