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STM32L021D4 Datenblatt(PDF) 36 Page - STMicroelectronics

Teilenummer STM32L021D4
Bauteilbeschribung  Access line ultra-low-power 32-bit MCU Arm®-based Cortex®-M0, 16KB Flash, 2KB SRAM, 512B EEPROM, ADC, AES
PDF  114 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
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STM32L021D4 Datenblatt(HTML) 36 Page - STMicroelectronics

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Pin descriptions
STM32L021x4
36/114
DocID027982 Rev 5
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. Legend/abbreviations used in the pinout table (continued)
Name
Abbreviation
Definition
Table 12. Pin definitions
Pin number
Pin name
(function
after reset)
Notes
Pin functions
Alternate functions Additional functions
2122
22
PC14-
OSC32_IN
I/O
FT
-
-
OSC32_IN
3233
33
PC15-
OSC32_OUT
I/O
TC
-
-
OSC32_OUT
4344
44
NRST
I/O RST
(2)
--
10
455
55
VDDA
S
-
(3)(4)
--
5566
66
PA0-CK_IN
I/O
TTa
-
USART2_RX,
LPTIM1_IN1,
TIM2_CH1,
USART2_CTS,
TIM2_ETR,
LPUART1_RX,
COMP1_OUT
COMP1_INM,
ADC_IN0,
RTC_TAMP2/WKUP1
/CK_IN
6677
77
PA1
I/O
FT
-
EVENTOUT,
LPTIM1_IN2,
TIM2_CH2,
I2C1_SMBA,
USART2_RTS_DE,
TIM21_ETR,
LPUART1_TX
COMP1_INP,
ADC_IN1
--
8
8
8
8
PA2
I/O
TTa
-
TIM21_CH1,
TIM2_CH3,
USART2_TX,
LPUART1_TX,
COMP2_OUT
COMP2_INM,
ADC_IN2,
RTC_TAMP3/RTC_T
S/RTC_OUT/WKUP3



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