Datasheet

Pinouts and pin description STM32L452xx
60/210 DocID029968 Rev 3
Table 15. 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
_u
(2)
I/O, with USB function supplied by V
DDUSB
_a
(3)
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 16 are: FT_f, FT_fa.
2. The related I/O structures in Table 16 are: FT_u, FT_fu.
3. The related I/O structures in Table 16 are: FT_a, FT_fa, TT_a.
Table 16. STM32L452xx pin definitions
Pin Number
Pin name
(function
after
reset)
Pin type I/O structure Notes
Pin functions
UFQFPN48 WLCSP64 LQFP64 LQFP64 SMPS UFBGA64 LQFP100 UFBGA100
Alternate functions Additional functions
----- 1B2 PE2 I/O FT -
TRACECK, TIM3_ETR,
TSC_G7_IO1,
SAI1_MCLK_A,
EVENTOUT
-
----- 2A1 PE3 I/O FT -
TRACED0, TIM3_CH1,
TSC_G7_IO2,
SAI1_SD_B, EVENTOUT
-
----- 3B1 PE4 I/O FT -
TRACED1, TIM3_CH2,
DFSDM1_DATIN3,
TSC_G7_IO3,
SAI1_FS_A, EVENTOUT
-
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