EFM32WG Datasheet, PDF (751/834 Pages) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

MODEn Input
0b0011
0b0100
0b0101
0b0110
0b0111
0b1000
0b1001
0b1010
0b1011
0b1100
0b1101
0b1110
0b1111
...the world's most energy friendly microcontrollers
Output
DOUT Pull-
down
0
On
Pull-
up
Alt.
Input
strength Filter
On
1
On
On
Push-pull x
x
On
Open
x
Source
(Wired-OR) ^x
On
Open Drain x
(Wired-
AND)
x
x
On
On
x
On
On
x
On
x
On
On
x
On On
x
On On
On
Description
Input enabled with pull-down and
filter
Input enabled with pull-up and filter
Push-pull
Push-pull with alt. drive strength
Open-source
Open-source with pull-down
Open-drain
Open-drain with filter
Open-drain with pull-up
Open-drain with pull-up and filter
Open-drain with alt. drive strength
Open-drain with alt. drive strength
and filter
Open-drain with alt. drive strength
and pull-up
Open-drain with alt. drive strength,
pull-up and filter
MODEn determines which mode the pin is in at a given time. Setting MODEn to 0b0000 disables the
pin, reducing power consumption to a minimum. When the output driver is disabled, the pin can be used
as a connection for an analog module (e.g. ADC, LCD...). Input is enabled by setting MODEn to any
value other than 0b0000. The pull-up, pull-down and filter function can optionally be applied to the input,
see Figure 32.2 (p. 751) .
The internal pull-up resistance, R_PU, and pull-down resistance, R_PD, are defined in the device datasheet.
When the filter is enabled it suppresses glitches with pulse widths as defined by the parameter t_IOGLITCH
in the device datasheet.
Figure 32.2. Tristated Output with Optional Pull-up or Pull-down
DIN
Analog connection
V_DD
Filt er enable
Input enable
Glit ch
suppression
filter
Opt ional
pull-up
Opt ional
pull-down
V_SS
When MODEn=0b0100 or MODEn=0b0101, the pin operates in push-pull mode. In this mode, the pin
is driven either high or low, dependent on the value of GPIO_Px_DOUT. The push-pull configuration is
shown in Figure 32.3 (p. 752) .
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
751
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