详细说明：

Features
■ Core: ARM 32-bit Cortex™-M3 CPU
– 48 MHz maximum frequency,
1.25 DMIPS/MHz (Dhrystone 2.1)
performance at 0 WS memory access
– Single-cycle multiplication and hardware
division
■ Memories
– 64 or 128 Kbytes of Flash memory
– 10 or 16 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
■ Debug mode
– Serial wire debug (SWD) and JTAG
interfaces
■ DMA
– 7-channel DMA controller
– Peripherals supported: timers, ADC, SPIs,
I2Cs and USARTs
■ 1 × 12-bit, 1.2 μs A/D converter (up to 16
channels)
– Conversion range: 0 to 3.6 V
– Temperature sensor
■ Up to 51 fast I/O ports
– 37/51 IOs all mappable on 16 external
interrupt vectors and almost all 5 V-tolerant

■ Up to 6 timers
– Three 16-bit timers, each with up to 4
IC/OC/PWM or pulse counter
– 2 watchdog timers (Independent and
Window)
– SysTick timer: 24-bit downcounter
■ Up to 8 communication interfaces
– Up to 2 x I2C interfaces (SMBus/PMBus)
– Up to 3 USARTs (ISO 7816 interface, LIN,
IrDA capability, modem control)
– Up to 2 SPIs (12 Mbit/s)
– USB 2.0 full speed interface
■ CRC calculation unit, 96-bit unique ID
■ ECOPACK® packages