EFM32WG Datasheet, PDF (238/834 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
15 USB - Universal Serial Bus Controller
0123 4
What?
Quick Facts
The USB is a full-speed/low-speed USB 2.0
compliant USB Controller that can be used
in OTG Dual Role Device, Device and Host
configurations. The on-chip 3.3V regulator
delivers up to 50 mA and can also be used
to power external components, eliminating
the need for an external LDO. The on-chip
regulator allows the system to run from a
battery utilizing the full voltage range of the
EFM32 still being compliant with the 3.3V +/-
10% USB voltage range.
Why?
USB provides a robust, industry-standard
way to interface PCs and other portable
devices.
How?
The flexible and highly software-configurable
architecture of the USB Controller makes it
easy to implement both device- and host-
capable solutions. The on-chip OTG PHY
with software controllable pull-up and pull-
down resistors, VBUS comparators and
ID-line detection reduces the number of
external components to a minimum. Third-
party USB software stacks are also available,
reducing the development time substantially.
By utilizing the very low energy consumption
in EM2, the USB device will be able to wake
up and perform tasks several times a second
without violating the 2.5 mA maximum
average current during suspend.
15.1 Introduction
The USB is a full-speed/low-speed USB 2.0 compliant OTG host/device controller. The architecture is
very flexible and allows the USB to be used in On-the-go (OTG) Dual-Role Device, Device and Host-
only configurations. The USB supports HNP and SRP protocols and both OTG Revisions 1.3 and 2.0
are supported. The on-chip voltage regulator and PHY reduces the number of external components to
a minimum. A switchable external 5V supply or step-up regulator is needed for OTG Dual Role Device
and Host configurations.
15.2 Features
• Fully compliant with Universal Serial Bus Specification, Revision 2.0
• Supports full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s) host and device
• Dedicated Internal DMA Controller
• 12 software-configurable endpoints (6 IN, 6 OUT) in addition to endpoint 0
• 2 KB endpoint memory
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
238
www.energymicro.com