Features

• • Embedded 32-bit RISC CPU core
    

  - 1.28 DMIPS/MHz (Dhrystone 2.1) performance
  

  - Normal operating mode: 24.576 MHz, 24 MHz, 18.432 MHz, and 12 MHz
  

  - Instruction execution time: Min. = 40ns @25 MHz (non-USB applications)
  

  • Memory:
    

  - Flash memory: 64K bytes (16K * 32)
  

  - RAM: 8K bytes (2K * 32)
  

  - Boot ROM: 8K bytes (2K * 32), for USB online upgrade
  

  • CPU clock sources
    

  - Internal RC oscillator 12 MHz/24 MHz (generated by 48 MHz oscillator)
  

  - External crystal oscillator 6 MHz ~25 MHz
  

  - Internal PLLs (generated by external crystal oscillator)
  

  • Internal RC 128 kHz for WDT
    
  • DMA: ADC, I2C (*4), UART (*4), TIMER (*3), I2S (*2), USB (*2), SPI (*4)
    
  • Communication interfaces
    

  - 2 master/slave I2C bus up to 400 kHz
  

  - 2 master/slave SPI up to 12 MHz@main frequency 24 MHz (main frequency/ 2)
  

  - 2 UARTs (UART0, UART1) up to 1.5 MHz@main frequency 24 MHz (main frequency/ 16)
  

  - 1 master/slave I2S up to 48 kHz sampling rate, with 3 data input and 3 data output pins
  

  - 1 USB device controller supports isochronous transfer, which supports ten endpoints including:
  

       *Endpoint 0: Control transfer endpoint
  

       *Endpoint 1~6: Interrupt/Bulk transfer endpoint     

       *Endpoint 7~8: Isochronous transfer endpoint (supports DMA)
  

       *Endpoint 9: Interrupt/Bulk transfer endpoint
  

  • Three 16-bit Timers (Timer0 ~ Timer2) with IC/OC/OCN/PWM
    
  • Eight 12-bit PWM pins (PWM0 ~PWM7) output with adjustable frequency
    
  • One G.726 single channel CODEC
    
  • Power on reset, 1-level low VDD reset (LVR), and 8-level low VDD detector (LVD)
    
  • 16-channel 12-bit A/D converter (ADC0 ~ ADC15) with 16 selectable inputs
    
  • Two built-in PLL circuits can use external crystal oscillator to produce a variety of frequencies for MCU and USB
    
  • Internal RC oscillator 12 MHz/24 MHz/48 MHz (factory calibrated within ±3%)
    
  • Support 2-wire JTAG for ISP & ICE modes
    
  • 47 programmable bi-directional I/O pins
    
  • Read Out Protection
    
  • Built-in 5V to 3.3V LDO with 80mA capacity
    
  • Emulated E2PROM
    
  • Operating voltage range: 2.4V to 3.6V
    
  • Operating temperature: -40℃ to +85℃
    
  • ESD protection HBM > 4KV, MM > 200V
    
  • Dice & Package (Green Package): LQFP64, LQFP48, QFN32