EFM32WG Datasheet, PDF (494/834 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
• Supports baud rates from 300 baud/s to 9600 baud/s
• Can use a high frequency clock source for even higher baud rates
• Configurable number of data bits: 8 or 9 (plus parity bit, if enabled)
• Configurable parity: off, even or odd
• HW parity bit generation and check
• Configurable number of stop bits, 1 or 2
• Capable of sleep-mode wake-up on received frame
• Either wake-up on any received byte or
• Wake up only on specified start and signal frames
• Supports transmission and reception in EM0, EM1 and EM2 with
• Full DMA support
• Specified start-byte can start reception automatically
• IrDA modulator (pulse generator, pulse extender)
• Multi-processor mode
• Loopback mode
• Half duplex communication
• Communication debugging
• PRS RX input
19.3 Functional Description
An overview of the LEUART module is shown in Figure 19.1 (p. 494) .
Figure 19.1. LEUART Overview
Peripheral Bus
LEUn _TX
TX Buffer
Pu l se
gen
TX Shift Regist er
UART Cont rol
and status
RX Buffer
St art fram e
(STARTFRAME)
=
! RXBLOCK
St art fram e int errupt
Signal fram e int errupt
Signal fram e
(SIGFRAME)
=
RX Shift Regist er
TX Baud rat e
generator
RX Wakeup
RX Baud rat e
generator
LEUn _RX
PRS Input
SYNC
Pu l se
extend
19.3.1 Frame Format
The frame format used by the LEUART consists of a set of data bits in addition to bits for synchronization
and optionally a parity bit for error checking. A frame starts with one start-bit (S), where the line is driven
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
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