EFM32HG308 Datasheet, PDF (6/54 Pages) Silicon Laboratories – Output state retention and wake-up from Shutoff Mode

Preliminary
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external pins. Response time and thereby also the current consumption can be configured by altering
the current supply to the comparator.
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 General Purpose Input/Output (GPIO)
In the EFM32HG308, there are 15 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 10 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 EFM32HG308 is a subset of the feature set described in the EFM32HG Reference
Manual. Table 2.1 (p. 6) describes device specific implementation of the features.
Table 2.1. Configuration Summary
Module
Cortex-M0+
DBG
MSC
DMA
RMU
EMU
CMU
WDOG
PRS
USB
I2C0
USART0
USART1
LEUART0
TIMER0
TIMER1
TIMER2
RTC
PCNT0
Configuration
Pin Connections
Full configuration
NA
Full configuration
DBG_SWCLK, DBG_SWDIO,
Full configuration
NA
Full configuration
NA
Full configuration
NA
Full configuration
NA
Full configuration
CMU_OUT0, CMU_OUT1
Full configuration
NA
Full configuration
NA
Full configuration
USB_VREGI, USB_VREGO, USB_DM,
USB_DMPU, USB_DP
Full configuration
I2C0_SDA, I2C0_SCL
Full configuration with IrDA and I2S
US0_TX, US0_RX. US0_CLK, US0_CS
Full configuration with I2S and IrDA
US1_TX, US1_RX, US1_CLK, US1_CS
Full configuration
LEU0_TX, LEU0_RX
Full configuration with DTI
TIM0_CC[2:0], TIM0_CDTI[2:0]
Full configuration
TIM1_CC[2:0]
Full configuration
TIM2_CC[2:0]
Full configuration
NA
Full configuration, 16-bit count register PCNT0_S[1:0]
2015-05-06 - EFM32HG308FXX - _Rev0.91
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