Features：

Includes ST state-of-the-art patented technology

• Arm® 32-bit Cortex®-M3 CPU core 

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

– Single-cycle multiplication and hardware division.

• Memories

– 64 or 128 Kbytes of Flash memory

– 20 Kbytes of SRAM

• Clock, reset and supply management

– 2.0 to 3.6 V application supply and I/Os 

– POR, PDR, and programmable voltage detector (PVD)

– 4 to 16 MHz crystal oscillator 

– Internal 8 MHz factory-trimmed RC

– Internal 40 kHz RC

– PLL for CPU clock

– 32 kHz oscillator for RTC with calibration

• Low-power

– Sleep, Stop and Standby modes

– VBAT supply for RTC and backup registers

• 2x 12-bit, 1 µs A/D converters (up to 16 channels)

– Conversion range: 0 to 3.6 V

– Dual-sample and hold capability

– Temperature sensor

• DMA

– 7-channel DMA controller 

– Peripherals supported: timers, ADC, SPIs, I²Cs and USARTs

• Up to 80 fast I/O ports

– 26/37/51/80 I/Os, all mappable on 16 external interrupt vectors and almost all 5 V-tolerant

• Debug mode: 

– Serial wire debug (SWD) and JTAG interfaces

• Seven timers

– Three 16-bit timers, each with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input.

– 16-bit, motor control PWM timer with dead-time generation and emergency stop

– Two watchdog timers (independent and window)

– SysTick timer 24-bit downcounter

• Up to nine communication interfaces

– Up to two I

2C interfaces (SMBus/PMBus®)

– Up to three USARTs (ISO 7816 interface, LIN, IrDA capability, modem control)

– Up to two SPIs (18 Mbit/s)

– CAN interface (2.0B Active)

– USB 2.0 full-speed interface

• CRC calculation unit, 96-bit unique ID

• Packages are ECOPACK®