Datasheet
DocID028794 Rev 4 61/224
STM32L433xx Pinouts and pin description
88
Table 14. 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
_l
(2)
I/O, with LCD function supplied by V
LCD
_u
(3)
I/O, with USB function supplied by V
DDUSB
_a
(4)
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 15 are: FT_f, FT_fa, FT_fl, FT_fla.
2. The related I/O structures in Table 15 are: FT_l, FT_fl, FT_lu.
3. The related I/O structures in Table 15 are: FT_u, FT_lu.
4. The related I/O structures in Table 15 are: FT_a, FT_la, FT_fa, FT_fla, TT_a, TT_la.
Table 15. STM32L433xx pin definitions
Pin Number
Pin name
(function after
reset)
Pin type
I/O structure
Notes
Pin functions
LQFP48
UFQFPN48
WLCSP49
WLCSP64
LQFP64
LQFP64 SMPS
UFBGA64
LQFP100
UFBGA100
Alternate functions
Additional
functions
- - - - - - - 1 B2 PE2 I/O FT_l -
TRACECK,
TSC_G7_IO1,
LCD_SEG38,
SAI1_MCLK_A,
EVENTOUT
-
- - - - - - - 2 A1 PE3 I/O FT_l -
TRACED0,
TSC_G7_IO2,
LCD_SEG39,
SAI1_SD_B,
EVENTOUT
-
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