STM32F102RBT6

The maximum frequency of the ARM 32-bit Cortex-M3 CPU in the STM32F102x8 MCU is 48 MHz.

The STM32F102x8 MCU has DMA channels that are not explicitly mentioned in the provided search results. Sorry, I couldn't find the answer in the PDF.

The STM32F102x8 MCU has the following communication interfaces available: 1. Universal synchronous/asynchronous receiver transmitter (USART) interfaces, which can communicate at up to 2.25 Mbit/s and support various features such as hardware management of CTS and RTS signals, IrDA SIR ENDEC, ISO 7816 compliance, and LIN Master/Slave capability. The USART interfaces can also be served by the DMA controller. 2. Serial peripheral interface (SPI), with two SPIs capable of communicating up to 12 Mbit/s in slave and master modes in full-duplex and simplex communication modes. The SPIs have a 3-bit prescaler for 8 master mode frequencies, configurable frame sizes of 8 or 16 bits, and hardware CRC generation/verification supporting basic SD Card/MMC modes. Both SPIs can be served by the DMA controller. 3. Inter-Integrated Circuit (I2C) interface, which meets the requirements of the standard I2C communication protocol. However, there are restrictions on the I/O pins SDA and SCL, as they are not "true" open-drain when configured as open-drain. 4. Universal serial bus (USB) device peripheral, compatible with USB Full-speed 12 Mbs, with software configurable endpoint settings and suspend/resume support. The dedicated 48 MHz clock is generated from the internal main PLL.