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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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STM32L021D4 데이터시트(PDF) 36 Page - STMicroelectronics |
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STM32L021D4 데이터시트(HTML) 36 Page - STMicroelectronics |
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36 / 114 page  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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