Product Features

• Compatible with MCS-51 1T instruction system

  The system clock frequency supports up to 48MHz

  The fastest machine cycle supports 1TSYS @ FSYS≤24MHz

  The fastest machine cycle supports 2TSYS @FSYS＝48MHz

• Memory

  program FLASH:32K×8Bit

  Data FLASH:1K×8Bit

  General RAM:256×8Bit

  General XRAM:2K×8Bit

  Support BOOT function area, 1K/2K/4K optional

  Program FLASH supports partition protection

• 4 Oscillation Modes

  HSI-Internal high-speed oscillator: 48MHz

  HSE-External high-speed oscillator: 8MHz/16MHz

  LSE-External low-speed oscillator: 32.768KHz

  LSI-Internal low-speed oscillator: 125KHz

• GPIO

  Up to 30 GPIO

  All support up/down resistance function

  All support edge (rising edge/ falling edge/ doubleedge) interrupt

  Support wake-up function

• Interrupt source

  Support all external port interrupts

  7 timer interrupts

  Other peripheral interrupts

• Timers

  WDT wake-up (watchdog timer)

  Timer0/1, Timer2, Timer3/4

  LSE_Timer (Support sleep wake function)

  WUT (wake-up wake-up)

  BRT (Serial port baud rate clock generator)

• Cyclic redundancy check

  CRC16 (CRC16-CCITT)

• Operating voltage range

  2.1V～5.5V

• Operating temperature range

  -40℃～105℃

• Low voltage reset function（LVR）

  1.8V/2.0V/2.5V/3.5V

• Low-voltage detection function（LVD）

  2.0V~4.3V 8 levels optional

• High-precision 12-bit ADC

  Up to 30 AD external channels

  Optional reference voltage(1.2V/2.0V/2.4V/3.0V/VDD)

  Can detect internal 1.2V reference voltage

  Support hardware trigger start conversionfunction

  Support a set of result digital comparisonfunction

• Buzzer driver

  50% duty cycle, frequency can be set freely

• PWM

  6 channels PWM

  6 mutually independent cycle counters

  Support independent/complementary/synchronous/groupmode

  Support edge alignment

  Support complementary mode dead zone delayfunction

• Communication module

  1 x SPI (communication rate up to 6Mb/s)

  1 x I2C (communication rate up to 400Kb/s)

  2 x UART (baud rate up to 1Mb/s)

  UART1 can be mapped to any GPIO

• Low power mode

  Idle mode（IDLE）

  Sleep mode（STOP）

• Support 96-bit Unique ID Number (UID)

  Each chip has an independent ID number

• Support Two-wire Serial Programming and Debugging