Datasheet

Pin descriptions STM32L010F4/K4
30/91 DS12323 Rev 2
Table 9. 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
TTa 3.3 V tolerant I/O directly connected to the ADC
TC Standard 3.3 V I/O
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
Table 10. Pin definitions
Pin
number
Pin name (function
after reset)
Pin
type
I/O
struct
ure
Not
es
Pin functions
TSSOP20
LQFP32
Alternate functions Additional functions
-1 VDD S -
(1)
--
2 2 PC14-OSC32_IN I/O FT - - OSC32_IN
3 3 PC15-OSC32_OUT I/O TC - - OSC32_OUT
44 NRST I/O RST
(2)
--
5 5 VDDA S -
(3)
--
66 PA0-CK_IN I/O TTa -
USART2_RX, LPTIM1_IN1,
TIM2_CH1, USART2_CTS,
TIM2_ETR, LPUART1_RX
ADC_IN0,
RTC_TAMP2/WKUP1/
CK_IN
77 PA1 I/O FT -
EVENTOUT, LPTIM1_IN2,
TIM2_CH2, I2C1_SMBA,
USART2_RTS, TIM21_ETR,
LPUART1_TX
ADC_IN1
88 PA2 I/O TTa -
TIM21_CH1, TIM2_CH3,
USART2_TX, LPUART1_TX
ADC_IN2,
RTC_TAMP3/RTC_TS/
RTC_OUT/WKUP3
99 PA3 I/O FT -
TIM21_CH2, TIM2_CH4,
USART2_RX, LPUART1_RX
ADC_IN3
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