DocID025743 Rev 3
27/113
STM32F031x4 STM32F031x6
Pinouts and pin description
33
Table 10. 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
FTf
5 V tolerant I/O, FM+ capable
TTa
3.3 V tolerant I/O directly connected to ADC
TC
Standard 3.3V I/O
B
Dedicated BOOT0 pin
RST
Bidirectional reset pin with embedded weak pull-up resistor
Notes
Unless otherwise specified by a note, all I/Os are set as floating inputs during
and after reset
Pin
functions
Alternate
functions
Functions selected through GPIOx_AFR registers
Additional
functions
Functions directly selected/enabled through peripheral registers
Table 11. Pin definitions
Pin number
Pin name
(function after
reset)
Pin t
y
pe
I/
O stru
ct
ure
Notes
Pin functions
LQ
FP4
8
LQ
FP3
2
UFQFPN32
UFQFPN28
WL
CS
P25
TS
SOP20
Alternate functions
Additional
functions
1
-
-
-
-
-
VBAT
S
-
-
Backup power supply
2
-
-
-
-
-
PC13
I/O
TC
(1)(2)
-
RTC_TAMP1,
RTC_TS,
RTC_OUT,
WKUP2
3
-
-
-
-
-
PC14-OSC32_IN
(PC14)
I/O
TC
(1)(2)
-
OSC32_IN
4
-
-
-
-
-
PC15-
OSC32_OUT
(PC15)
I/O
TC
(1)(2)
-
OSC32_OUT
5
2
2
2
A5
2
PF0-OSC_IN
(PF0)
I/O
FT
-
-
OSC_IN
微可Vicor——值得信赖的元器件供应商
http://www.vicor.top/
021-31660491
微可Vicor——值得信赖的元器件供应商
http://www.vicor.top/
021-31660491