EFM32TG108 Datasheet, PDF (6/48 Pages) Silicon Laboratories – Output state retention and wake-up from Shutoff Mode

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2.1.19 Voltage Comparator (VCMP)
The Voltage Supply Comparator is used to monitor the supply voltage from software. An interrupt can
be generated when the supply falls below or rises above a programmable threshold. Response time and
thereby also the current consumption can be configured by altering the current supply to the comparator.
2.1.20 Low Energy Sensor Interface (LESENSE)
The Low Energy Sensor Interface (LESENSE), is a highly configurable sensor interface with support for
up to 4 individually configurable sensors. By controlling the analog comparators, LESENSE is capable of
supporting a wide range of sensors and measurement schemes, and can for instance measure resistive
and capacitive sensors. LESENSE also includes a programmable FSM which enables simple processing
of measurement results without CPU intervention. LESENSE is available in energy mode EM2, in addi-
tion to EM0 and EM1, making it ideal for sensor monitoring in applications with a strict energy budget.
2.1.21 General Purpose Input/Output (GPIO)
In the EFM32TG108, there are 17 General Purpose Input/Output (GPIO) pins, which are divided into
ports with up to 16 pins each. These pins can individually be configured as either an output or input. More
advanced configurations like open-drain, filtering and drive strength can also be configured individually
for the pins. The GPIO pins can also be overridden by peripheral pin connections, like Timer PWM
outputs or USART communication, which can be routed to several locations on the device. The GPIO
supports up to 11 asynchronous external pin interrupts, which enables interrupts from any pin on the
device. Also, the input value of a pin can be routed through the Peripheral Reflex System to other
peripherals.
2.2 Configuration Summary
The features of the EFM32TG108 is a subset of the feature set described in the EFM32TG Reference
Manual. Table 2.1 (p. 6) describes device specific implementation of the features.
Table 2.1. Configuration Summary
Module
Cortex-M3
DBG
MSC
DMA
RMU
EMU
CMU
WDOG
PRS
I2C0
USART1
LEUART0
TIMER0
TIMER1
RTC
Configuration
Full configuration
Full configuration
Full configuration
Full configuration
Full configuration
Full configuration
Full configuration
Full configuration
Full configuration
Full configuration
Full configuration with I2S
Full configuration
Full configuration
Full configuration
Full configuration
Pin Connections
NA
DBG_SWCLK, DBG_SWDIO,
DBG_SWO
NA
NA
NA
NA
CMU_OUT0, CMU_OUT1
NA
NA
I2C0_SDA, I2C0_SCL
US1_TX, US1_RX, US1_CLK, US1_CS
LEU0_TX, LEU0_RX
TIM0_CC[2:0]
TIM1_CC[2:0]
NA
2015-03-06 - EFM32TG108FXX - d0032_Rev1.40
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