The STM32F101xC, STM32F101xD and STM32F101xE access line family incorporates the high-performance ARM Cortex -M3 32-bit RISC core operating at a 36 MHz frequency, high-speed embedded memories (Flash memory up to 512 Kbytes and SRAM up to 48 Kbytes), and an extensive range of enhanced I/Os and peripherals connected to two APB buses. All devices offer one 12-bit ADC, four general-purpose 16-bit timers, as well as standard and advanced communication interfaces: up to two I²Cs, three SPIs and five USARTs.The STM32F101xx high-density access line family operates in the –40 to +85 °C temperature range, from a 2.0 to 3.6 V power supply. A comprehensive set of power-saving mode allows the design of low-power applications.These features make the STM32F101xx high-density access line microcontroller family suitable for a wide range of applications such as medical and handheld equipment, PC peripherals and gaming, GPS platforms, industrial applications, PLC, printers, scanners alarm systems and video intercom.Core: ARM® 32-bit Cortex® -M3 CPU36 MHz maximum frequency,1.25 DMIPS/MHz (Dhrystone 2.1) performanceSingle-cycle multiplication and hardware divisionMemories256 to 512 Kbytes of Flash memoryup to 48 Kbytes of SRAMFlexible static memory controller with 4 Chip Select. Supports Compact Flash, SRAM, PSRAM, NOR and NAND memoriesLCD parallel interface, 8080/6800 modesClock, reset and supply management2.0 to 3.6 V application supply and I/OsPOR, PDR, and programmable voltage detector (PVD)4-to-16 MHz crystal oscillatorInternal 8 MHz factory-trimmed RCInternal 40 kHz RC with calibration capability32 kHz oscillator for RTC with calibrationLow powerSleep, Stop and Standby modesVBATsupply for RTC and backup registers1 x 12-bit, 1 µs A/D converters (up to 16 channels)Conversion range: 0 to 3.6 VTem