ST STM32G4 Series Reference Manual page 304

Reset and clock control (RCC)
Bit 31 LPTIM1RST: Low Power Timer 1 reset
Bit 30 I2C3RST: I2C3 reset
Bit 29 Reserved, must be kept at reset value.
Bit 28 PWRRST: Power interface reset
Bits 27:26 Reserved, must be kept at reset value.
Bit 25 FDCANRST: FDCAN reset
Bit 24 Reserved, must be kept at reset value.
Bit 23 USBRST: USB device reset
Bit 22 I2C2RST: I2C2 reset
Bit 21 I2C1RST: I2C1 reset
Bit 20 UART5RST: UART5 reset
Bit 19 UART4RST: UART4 reset
Bit 18 USART3RST: USART3 reset
304/2126
Set and cleared by software.
0: No effect
1: Reset LPTIM1
Set and cleared by software.
0: No effect
1: Reset I2C3 interface
Set and cleared by software.
0: No effect
1: Reset PWR
Set and reset by software.
0: No effect
1: Reset the FDCAN
Set and reset by software.
0: No effect
1: Reset USB device
Set and cleared by software.
0: No effect
1: Reset I2C2
Set and cleared by software.
0: No effect
1: Reset I2C1
Set and cleared by software.
0: No effect
1: Reset UART5
Set and cleared by software.
0: No effect
1: Reset UART4
Set and cleared by software.
0: No effect
1: Reset USART3
RM0440 Rev 4
RM0440