Table 7. Legend/Abbreviations Used In The Pinout Table - STMicroelectronics STM32L151CB Manual

STM32L151x6/8/B, STM32L152x6/8/B
Name
Pin name
Pin type
I/O structure
Notes
Alternate
functions
Pin
functions
Additional
functions

Table 7. Legend/abbreviations used in the pinout table

Abbreviation
Unless otherwise specified in brackets below the pin name, the pin function
during and after reset is the same as the actual pin name
S
I
I/O
FT
TC
B
RST Bidirectional reset pin with embedded weak pull-up resistor
Unless otherwise specified by a note, all I/Os are set as floating inputs during
and after reset
Functions selected through GPIOx_AFR registers
Functions directly selected/enabled through peripheral registers
DocID17659 Rev 10
Definition
Supply pin
Input only pin
Input / output pin
5 V tolerant I/O
Standard 3.3 V I/O
Dedicated BOOT0 pin
Pin descriptions
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