Table 10. Legend/Abbreviations Used In The Pinout Table; Table 11. Pin Definitions - STMicroelectronics STM32F031F4 Manual

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Name
Pin name
Pin type
I/O structure
Notes
Pin
functions
Pin number
1 - - -
2 - - -
3 - - -
4 - - -
5 2 2 2 A5
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Table 10. 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
FTf
TTa
TC
B
RST
Unless otherwise specified by a note, all I/Os are set as floating inputs during
and after reset
Alternate
Functions selected through GPIOx_AFR registers
functions
Additional
Functions directly selected/enabled through peripheral registers
functions

Table 11. Pin definitions

Pin name
(function after
reset)
- - VBAT
- - PC13
PC14-OSC32_IN
- -
(PC14)
PC15-
OSC32_OUT
- -
(PC15)
PF0-OSC_IN
2
(PF0)
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Input / output pin
5 V tolerant I/O
5 V tolerant I/O, FM+ capable
3.3 V tolerant I/O directly connected to ADC
Standard 3.3V I/O
Dedicated BOOT0 pin
Bidirectional reset pin with embedded weak pull-up resistor
Notes
Alternate functions
S - -
(1)(2)
I/O TC
(1)(2)
I/O TC
(1)(2)
I/O TC
I/O FT -
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Pinouts and pin description
Definition
Supply pin
Input only pin
Pin functions
Additional
functions
Backup power supply
RTC_TAMP1,
RTC_TS,
-
RTC_OUT,
- OSC32_IN
- OSC32_OUT
- OSC_IN
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