Datasheet
DocID028800 Rev 1 53/200
STM32L431xx Pinouts and pin description
77
Figure 13. STM32L431Kx UFQFPN32 pinout
(1)
1. The above figure shows the package top view.
06Y9
8)4)31
9''
3&26&B,1
3&26&B287
1567
9''$95()
3$&.B,1
3$
3$
3$
3$
3$
966
3$
3$
3%
3%
3$
3$
3$
3$
3$
3$
3$
9''
966
3+%227
3%
3$
3%
3%
3%
3%
Table 13. Legend/abbreviations used in the pinout table
Name Abbreviation Definition
Pin name
Unless otherwise specified in brackets below the pin name, the pin function during and after
reset is the same as the actual pin name
Pin type
S Supply pin
I Input only pin
I/O Input / output pin
I/O structure
FT 5 V tolerant I/O
TT 3.6 V tolerant I/O
RST Bidirectional reset pin with embedded weak pull-up resistor
Option for TT or FT I/Os
_f
(1)
I/O, Fm+ capable
_a
(2)
I/O, with Analog switch function supplied by V
DDA
Notes Unless otherwise specified by a note, all I/Os are set as analog inputs during and after reset.
Pin
functions
Alternate
functions
Functions selected through GPIOx_AFR registers
Additional
functions
Functions directly selected/enabled through peripheral registers
1. The related I/O structures in Table 14 are: FT_f, FT_fa.
2. The related I/O structures in Table 14 are: FT_a, FT_fa, TT_a.
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