EFM32TG108F32-QFN24 datasheet(5/48 Pages) SILABS

Part #	EFM32TG108F32-QFN24

Description	Output state retention and wake-up from Shutoff Mode

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Manufacturer	SILABS [Silicon Laboratories]

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2015-03-06 - EFM32TG108FXX - d0032_Rev1.40

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2.1.11 Universal Synchronous/Asynchronous Receiver/Transmitter (US-

ART)

The Universal Synchronous Asynchronous serial Receiver and Transmitter (USART) is a very flexible

serial I/O module. It supports full duplex asynchronous UART communication as well as RS-485, SPI,

MicroWire and 3-wire. It can also interface with ISO7816 SmartCards, IrDA and I2S devices.

2.1.12 Pre-Programmed UART Bootloader

The bootloader presented in application note AN0003 is pre-programmed in the device at factory. Auto-

baud and destructive write are supported. The autobaud feature, interface and commands are described

further in the application note.

2.1.13 Low Energy Universal Asynchronous Receiver/Transmitter

(LEUART)

The unique LEUART

TM, the Low Energy UART, is a UART that allows two-way UART communication on

a strict power budget. Only a 32.768 kHz clock is needed to allow UART communication up to 9600 baud/

s. The LEUART includes all necessary hardware support to make asynchronous serial communication

possible with minimum of software intervention and energy consumption.

2.1.14 Timer/Counter (TIMER)

The 16-bit general purpose Timer has 3 compare/capture channels for input capture and compare/Pulse-

Width Modulation (PWM) output.

2.1.15 Real Time Counter (RTC)

The Real Time Counter (RTC) contains a 24-bit counter and is clocked either by a 32.768 kHz crystal

oscillator, or a 32.768 kHz RC oscillator. In addition to energy modes EM0 and EM1, the RTC is also

available in EM2. This makes it ideal for keeping track of time since the RTC is enabled in EM2 where

most of the device is powered down.

2.1.16 Low Energy Timer (LETIMER)

The unique LETIMER

TM, the Low Energy Timer, is a 16-bit timer that is available in energy mode EM2

in addition to EM1 and EM0. Because of this, it can be used for timing and output generation when most

of the device is powered down, allowing simple tasks to be performed while the power consumption of

the system is kept at an absolute minimum. The LETIMER can be used to output a variety of waveforms

with minimal software intervention. It is also connected to the Real Time Counter (RTC), and can be

configured to start counting on compare matches from the RTC.

2.1.17 Pulse Counter (PCNT)

The Pulse Counter (PCNT) can be used for counting pulses on a single input or to decode quadrature

encoded inputs. It runs off either the internal LFACLK or the PCNTn_S0IN pin as external clock source.

The module may operate in energy mode EM0 - EM3.

2.1.18 Analog Comparator (ACMP)

The Analog Comparator is used to compare the voltage of two analog inputs, with a digital output indi-

cating which input voltage is higher. Inputs can either be one of the selectable internal references or from

external pins. Response time and thereby also the current consumption can be configured by altering

the current supply to the comparator.

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EFM32TG108F32-QFN24 Datasheet(PDF) 5 Page - Silicon Laboratories

EFM32TG108F32-QFN24 Datasheet(HTML) 5 Page - Silicon Laboratories

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