Features：

• Core: ARM^® Cortex^®-M0+ 

  - Frequency up to 48 MHz 

• Operating temperature: -40℃ to 85℃ ; 

• Operating voltage: 1.8V to 3.6V @ LDO mode ; 2V to 3.6V @ DCDC mode 

• Memories 

  - Maximum 64 Kbytes FLASH, data retention 25 years @85℃ 

  - Up to 8 Kbytes RAM, support parity 

  - 128 bytes OTP memory 

• Radio Frequency 

  - Communication band: 370MHz ~ 590MHz, 740MHz ~ 1180MHz 

  - Modulation method: ChirpIoT™ 

  - Transmission output power: -7dBm ~ 22dBm 

  - Maximum link budget: 162dB 

  - Receive sensitivity: -140dBm@62.5kHz 

  - Operating current 

     DeepSleep current: 400nA 

     Receive current: 12.5mA@DCDC mode 

     Transmit current: 135mA@22dBm, 83mA@18dBm, 25mA@0dBm 

  - Support bandwidth: 62.5kHz, 125kHz, 250kHz, 500kHz 

  - Support SF factor: 7 ~ 12, automatic spreading factor recognition supported 

  - Support code rate: 4/5, 4/6, 4/7, 4/8 

  - Support CAD function 

  - Low rate mode support: 0.08kbps ~ 20.4kbps 

  - Fully integrated frequency synthesizer 

• CRC calculation unit 

• Reset and power management 

  - Low power modes（Sleep，DeepSleep） 

  - Power-on/Power down reset（POR/BOR） 

  - Programmable low voltage detector（LVD）

• Clock management 

  - 32MHz crystal oscillator for RF subsystems 

  - 4 to 32 MHz crystal oscillator 

  - 32kHz low speed crystal oscillator 

  - Internal 48 MHz RC oscillator 

  - Internal 32 kHz RC oscillator 

  - Internal 10 kHz RC oscillator 

  - Internal 150 kHz RC oscillator 

  - Clock monitoring system 

  - Allow independent shutdown of each peripheral clock 

• Up to 33 I/O ports 

  - All I/Os support interrupt function 

  - All I/Os support interrupt input filtering 

• 4-channel DMA controller 

• Analog to digital converter 

  - 12-bit accuracy, ±1 LSB 

  - Up to 1M SPS conversion speed 

  - Internel voltage reference 

  - Analog watchdog function 

  - Internal temperature sensor 

• Dual voltage comparator 

• Real Time Clock and Calendar 

  - Support wakeup from Sleep/DeepSleep mode 

• Timers 

  - One 16-bit advanced-control timer for six-channel capture/compare and 3 pairs of complementary PWM output, dead time and flexible synchronization function 

  - Two groups of 16-bit general-purpose timers 

  - Three groups of 16-bit basic timers 

  - 16-bit automatic wake-up timer 

  - Window watchdog timer 

  - Independent watchdog timer 

• Communication interfaces 

  - Three low-power UARTs with fractional baud rate, support LIN communication interface 

  - One SPI interface (12Mbit/s) 

  - One I2C interface (1Mbit/s) 

  - IR modulator

• Serial wire debug (SWD) 

• 80-bit unique ID