STM32F105R8T6

The STM32F105xx and STM32F107xx microcontroller units have a total of five communication interfaces available. These include three universal synchronous/asynchronous receiver transmitters (USART1, USART2, and USART3) and two universal asynchronous receiver transmitters (UART4 and UART5) .

The clock, reset, and supply management features in the STM32F105xx and STM32F107xx MCUs include: - Application supply and I/Os ranging from 2.0 to 3.6 V . - Power-on reset (POR), power-down reset (PDR), and programmable voltage detector (PVD) . - Support for a 3-to-25 MHz crystal oscillator, internal 8 MHz factory-trimmed RC oscillator, and internal 40 kHz RC oscillator with calibration . - Inclusion of a 32 kHz oscillator for real-time clock (RTC) with calibration . - Low power modes such as Sleep, Stop, and Standby modes . - Provision for VBAT supply for RTC and backup registers . STM32F105xx, STM32F107xx. .

The maximum frequency of the ARM 32-bit Cortex-M3 CPU in the STM32F105xx and STM32F107xx MCUs is 72 MHz.