STM32L443RCI3 - STMicroelectronics

STM32L443RCI3 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be achieved with the internal oscillator?
  The maximum clock frequency that can be achieved with the internal oscillator is 32 MHz. However, it's recommended to use the internal oscillator in conjunction with the PLL to achieve higher frequencies up to 80 MHz.
• How do I configure the ADC to achieve the highest accuracy?
  To achieve the highest accuracy with the ADC, it's recommended to use the internal voltage reference (VREFINT), calibrate the ADC, and use the ADC in the 'scan mode' with a sampling rate of 1.5 cycles per conversion. Additionally, ensure that the analog input pins are not shared with digital signals and that the ADC clock frequency is set to 2.4 MHz or lower.
• What is the maximum current that can be sourced or sunk by the GPIO pins?
  The maximum current that can be sourced or sunk by the GPIO pins is 20 mA. However, it's recommended to limit the current to 10 mA or less to ensure reliable operation and to prevent overheating.
• How do I implement a low-power mode with the STM32L443RCI3?
  To implement a low-power mode, use the STOP mode, which reduces the power consumption to approximately 1.5 μA. In this mode, the CPU is stopped, and the peripherals are disabled. You can also use the STANDBY mode, which reduces the power consumption to approximately 0.5 μA. In this mode, the CPU is stopped, and the peripherals are disabled, but the SRAM and registers are retained.
• What is the maximum amount of flash memory that can be written in a single operation?
  The maximum amount of flash memory that can be written in a single operation is 256 bytes. This is due to the architecture of the flash memory, which is divided into 256-byte pages.