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STM32U073RCT3TR Datasheet(PDF) 36 Page - STMicroelectronics |
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STM32U073RCT3TR Datasheet(HTML) 36 Page - STMicroelectronics |
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36 / 146 page  Pin Number Pin name (function after reset) Note Alternate functions Additional functions 28 A6 41 41 57 C4 75 A4 PB5 I/O FT_l LPTIM1_IN1, TIM3_CH2, SPI1_MOSI, SPI3_MOSI, USART1_CK, LPUART3_CTS, TSC_G2_IO2, LCD_SEG9, COMP2_OUT, TIM16_BKIN, EVENTOUT - - - - - - - - F4 VSS S - - 29 B7 42 42 58 D3 76 B4 PB6 I/O FT_fa LPTIM1_ETR, I2C4_SCL, I2C1_SCL, I2C2_SCL, LPUART3_TX, USART1_TX, TSC_G2_IO3, LPUART2_TX, TIM16_CH1N, EVENTOUT COMP2_INP2 30 A8 43 43 59 C3 77 B3 PB7 I/O FT_fla LPTIM1_IN2, I2C4_SDA, I2C1_SDA, I2C2_SDA, LPUART3_RX, USART1_RX, USART4_CTS, TSC_G2_IO4, LPUART2_RX, LCD_SEG21, EVENTOUT COMP2_INM1, PVD_IN 31 C8 44 44 60 B4 78 A2 PF3-BOOT0 (BOOT0) I/O FT EVENTOUT - - A10 45 45 61 B3 79 A1 PB8 I/O FT_fl LPTIM1_IN2, LPTIM3_IN2, I2C2_SCL, I2C1_SCL, USART3_TX, LCD_SEG16, TIM16_CH1, EVENTOUT - - - 46 46 62 A3 80 B2 PB9 I/O FT_fl IR_OUT, LPTIM3_CH4, I2C2_SDA, I2C1_SDA, SPI2_NSS, USART3_RX, LCD_COM3, LPTIM1_CH4, EVENTOUT - 32 A12 47 47 63 D4 1 F6 VSS S - - - 1 B11 48 48 64 E4 2 G7 VDD S - - - 1. PC13, PC14 and PC15 are supplied through the power switch. Since the switch only sinks a limited amount of current (3 mA), the use of GPIOs PC13 to PC15 in output mode is limited: • The speed should not exceed 2 MHz with a maximum load of 30 pF • These GPIOs must not be used as current sources (for example to drive a LED). 2. After an RTC domain power-up, PC13, PC14 and PC15 operate as GPIOs. Their function then depends on the content of the RTC registers. The RTC registers are not reset upon system reset. For details on how to manage these GPIOs, refer to the RTC domain and RTC register descriptions in the RM0503 reference manual. 3. Pins PA9/PA10 can be remapped in place of pins PA11/PA12 (default mapping), using SYSCFG_CFGR1 register. 4. Upon reset, these pins are configured as SW debug alternate functions, and the internal pull-up on PA13 pin and the internal pull-down on PA14 pin are activated. 4.3 Alternate functions Table 13. Port A alternate functions Port AF0 AF1 AF2 AF3 AF4 AF5 AF6 AF7 AF8 AF9 AF10 AF11 AF12 AF13 AF14 AF15 SYS_AF LPTIM1/ SYS_AF/ TIM1/2 I2C4/ LPTIM1/3/ TIM1/2/3 I2C2/4/ SYS_AF/ USART2 I2C1/2/3/4/ LPTIM3 I2C2/SPI1/2 COMP1/ LPUART3/ SPI2/3 USART1/2/3 LPUART1/2/3/ USART4 TSC CRS/ LPUART2/U SB LCD COMP1/2/LC D - LPTIM1/2/3/ TIM2/15/16 EVENTOUT Port A PA0 - TIM2_CH1 - - - - - USART2_CTS USART4_TX - - LCD_SEG42 COMP1_OUT - TIM2_ETR EVENTOUT |
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