STM32L412CBU6P - STMicroelectronics

STM32L412CBU6P Frequently Asked Questions (FAQs)

• What is the maximum clock frequency of the STM32L412CBU6P?
  The maximum clock frequency of the STM32L412CBU6P is 32 MHz, but it can be overclocked to 48 MHz using the internal PLL.
• How do I configure the internal voltage regulator (VREG) on the STM32L412CBU6P?
  The internal voltage regulator (VREG) on the STM32L412CBU6P can be configured using the PWR_VREG register. You need to set the VREG bit to 1 to enable the internal voltage regulator, and then set the VOS bit to select the desired voltage output (1.2V, 1.5V, or 1.8V).
• What is the purpose of the VBAT pin on the STM32L412CBU6P?
  The VBAT pin on the STM32L412CBU6P is used to connect a battery or a supercapacitor to power the real-time clock (RTC) and the backup registers when the main power supply is turned off. This allows the device to retain its RTC and backup register values even when the main power is off.
• How do I use the low-power modes on the STM32L412CBU6P?
  The STM32L412CBU6P has several low-power modes, including Sleep, Stop, and Standby modes. To use these modes, you need to configure the Power Control Register (PWR_CSR) to select the desired low-power mode, and then use the WFI (Wait For Interrupt) or WFE (Wait For Event) instruction to enter the low-power mode.
• What is the maximum current consumption of the STM32L412CBU6P?
  The maximum current consumption of the STM32L412CBU6P depends on the operating frequency, voltage, and peripherals used. According to the datasheet, the maximum current consumption is around 350 mA at 32 MHz and 3.3V, but this can be reduced to around 20 μA in low-power modes.