EFM32HG308 Datasheet, PDF (39/54 Pages) Silicon Laboratories – Output state retention and wake-up from Shutoff Mode

Preliminary
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4.2 Alternate Functionality Pinout
A wide selection of alternate functionality is available for multiplexing to various pins. This is shown in
Table 4.2 (p. 39) . The table shows the name of the alternate functionality in the first column, followed
by columns showing the possible LOCATION bitfield settings.
Note
Some functionality, such as analog interfaces, do not have alternate settings or a LOCA-
TION bitfield. In these cases, the pinout is shown in the column corresponding to LOCA-
TION 0.
Table 4.2. Alternate functionality overview
Alternate
Functionality
0
ACMP0_CH0
PC0
ACMP0_CH1
PC1
ACMP0_O
PE13
BOOT_RX
PF1
BOOT_TX
PF0
CMU_CLK0
CMU_CLK1
DBG_SWCLK
PF0
DBG_SWDIO
PF1
GPIO_EM4WU0
GPIO_EM4WU3
GPIO_EM4WU4
GPIO_EM4WU5
PA0
PF1
PF2
PE13
HFXTAL_N
PB14
HFXTAL_P
I2C0_SCL
I2C0_SDA
LEU0_RX
PB13
PA0
LEU0_TX
LFXTAL_N
LFXTAL_P
PCNT0_S0IN
PCNT0_S1IN
PRS_CH0
PRS_CH1
PRS_CH2
PRS_CH3
PB8
PB7
PC14
PA0
PC0
PC1
1
PB14
PB13
LOCATION
2
3
4
PB11
PF2
PE12 PB11
PC1
PC0
PF1 PA0
PF0 PF2
PC0
PA0
PC1
PB11
PC14 PF2
PC15 PE12
PE13
PA0
5
6
Description
Analog comparator ACMP0, channel 0.
Analog comparator ACMP0, channel 1.
Analog comparator ACMP0, digital output.
Bootloader RX.
Bootloader TX.
Clock Management Unit, clock output number 0.
Clock Management Unit, clock output number 1.
Debug-interface Serial Wire clock input.
Note that this function is enabled to pin out of reset, and
has a built-in pull down.
Debug-interface Serial Wire data input / output.
Note that this function is enabled to pin out of reset, and
has a built-in pull up.
Pin can be used to wake the system up from EM4
Pin can be used to wake the system up from EM4
Pin can be used to wake the system up from EM4
Pin can be used to wake the system up from EM4
High Frequency Crystal negative pin. Also used as exter-
nal optional clock input pin.
High Frequency Crystal positive pin.
PF1 PE13 I2C0 Serial Clock Line input / output.
PF0 PE12 I2C0 Serial Data input / output.
PC15
LEUART0 Receive input.
PC14
LEUART0 Transmit output. Also used as receive input in
half duplex communication.
Low Frequency Crystal (typically 32.768 kHz) negative
pin. Also used as an optional external clock input pin.
Low Frequency Crystal (typically 32.768 kHz) positive pin.
Pulse Counter PCNT0 input number 0.
Pulse Counter PCNT0 input number 1.
Peripheral Reflex System PRS, channel 0.
Peripheral Reflex System PRS, channel 1.
Peripheral Reflex System PRS, channel 2.
Peripheral Reflex System PRS, channel 3.
2015-05-06 - EFM32HG308FXX - _Rev0.91
39
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