Features
 Core — 32-bit ARM® Cortex
® -M0 — up to 48MHz
 Memories — 32KB program flash — 192B data flash — 4KB SRAM with parity check
 Clocks — 8MHz internal RC oscillator(HRC), ±1%@typ — 14MHz internal RC oscillator(HRC14), ±1%@typ — 40KHz internal RC oscillator(LRC), ±10%@typ — 4~32MHz external high speed crystal oscillator(HXT) — Internal x2,x3,..,x16 Phase-locked loop(PLL), up to 48MHz
 Operation environment — VDD power supply: 2.0 to 5.5V — VDDA power supply: 2.0 to 5.5V — Temperature range: -40 to 85℃ or -40 to 105℃
 BOOT mode — Support boot from program flash — Support boot from system memory — Support boot from SRAM
 Power management — Low-power modes: sleep, deepsleep1, deepsleep2, powerdown — Power-on/power-down reset (POR/PDR) — Low voltage detector (LVD)
 I/Os — 27 I/Os up to 48MHz — All I/Os can be mapped to external interrupt vectors
 ADC — One 12-bit ADC — Conversion time is up to 1uS — Up to 10 external input channels — Operation voltage range: 2.4 to 5.5V — Input signal range: 0~5.5V
 Timers — One advanced 16-bit timer for 6 channels PWM output — Fore general purpose 16-bit timers — One basic 16-bit timer — One free watchdog timer (FWDT): 8-bit prescaler and 12-bit downcounter — One window watchdog timer (WWDT): 7-bit downcounter
— One SysTick timer: 24-bit downcounter
 DMA — Five channels — Support peripherals: SPIx, I2Cx, USARTx, TIMx, ADC
 Inerrupt and events — Up to 32 maskable interrupt channels — Four priority levels — Sixteen external interrupt lines
 SPI — Onr SPI — 3-bit predivider suppport 8 kinds of frequency — Frame size can be configed to 4 to 16 bits
 USART — Two USARTs — Support: ISO7816, LIN, IrDA mode — Support auto baudrate detection — Can wakeup from deepsleep1 and deepsleep2
 I2C — One I2C with master or slave mode — Support: standard mode (up to 100k bit/s), Fast mode (up to 400k bit/s), — Support: 7-bit and 10-bit addressing modes
 CRC unit
 Serial wire debug (SWD)
 Packages — TSSOP20 — QFN28 — QFN32 — LQFP32