EFM32WG Datasheet, PDF (3/834 Pages) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

...the world's most energy friendly microcontrollers
2 About This Document
This document contains reference material for the EFM32WG series of microcontrollers. All modules
and peripherals in the EFM32WG series devices are described in general terms. Not all modules are
present in all devices, and the feature set for each device might vary. Such differences, including pin-
out, are covered in the device-specific datasheets.
2.1 Conventions
Register Names
Register names are given as a module name prefix followed by the short register name:
TIMERn_CTRL - Control Register
The "n" denotes the numeric instance for modules that might have more than one instance.
Some registers are grouped which leads to a group name following the module prefix:
GPIO_Px_DOUT - Port Data Out Register,
where x denotes the port instance (A,B,...).
Bit Fields
Registers contain one or more bit fields which can be 1 to 32 bits wide. Multi-bit fields are denoted with
(x:y), where x is the start bit and y is the end bit.
Address
The address for each register can be found by adding the base address of the module (found in the
Memory Map), and the offset address for the register (found in module Register Map).
Access Type
The register access types used in the register descriptions are explained in Table 2.1 (p. 3) .
Table 2.1. Register Access Types
Access Type
R
RW
RW1
W1
W
RWH
Description
Read only. Writes are ignored.
Readable and writable.
Readable and writable. Only writes to 1 have effect.
Read value undefined. Only writes to 1 have effect.
Write only. Read value undefined.
Readable, writable and updated by hardware.
Number format
0x prefix is used for hexadecimal numbers.
0b prefix is used for binary numbers.
Numbers without prefix are in decimal representation.
Reserved
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
3
www.energymicro.com