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The STM32F103xx medium-density performance line family incorporates the high performance ARM Cortex?-M3 32-bit RISC core operating at a 72 MHz frequency, high speed embedded memories (Flash memory up to 128 Kbytes and SRAM up to 20 Kbytes), and an extensive range of enhanced I/Os and peripherals connected to two APB buses. All devices offer two 12-bit ADCs, three general purpose 16-bit timers plus one PWM timer, as well as standard and advanced ommunication interfaces: up to two I2Cs and SPIs, three USARTs, an USB and a CAN.

Features

* ARM 32-bit Cortex?-M3 CPU Core

¨C 72 MHz maximum frequency, 1.25 DMIPS/MHz (Dhrystone 2.1) performance at 0 wait state memory access

¨C Single-cycle multiplication and hardware division

* Memories

¨C 64 or 128 Kbytes of Flash memory

¨C 20 Kbytes of SRAM

* Clock, reset and supply management

¨C 2.0 to 3.6 V application supply and I/Os

¨C POR, PDR, and programmable voltage detector (PVD)

¨C 4-to-16 MHz crystal oscillator

¨C Internal 8 MHz factory-trimmed RC

¨C Internal 40 kHz RC

¨C PLL for CPU clock

¨C 32 kHz oscillator for RTC with calibration