8-Bit 80C51 3 V Low-Power 16/32/64 KB Flash Microcontroller with 1 KB RAM


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  • 80C51 CPU
  • 3 V operating voltage from 0 MHz to 33 MHz
  • 16/32/64 kB of on-chip flash user code memory with ISP and IAP
  • Supports 12-clock (default) or 6-clock mode selection via software or ISP
  • SPI and enhanced UART
  • PCA with PWM and capture/compare functions
  • Four 8-bit I/O ports with three high-current port 1 pins (16 mA each)
  • Three 16-bit timers/counters
  • Programmable watchdog timer
  • Eight interrupt sources with four priority levels
  • Second DPTR register
  • Low EMI mode (ALE inhibit)
  • TTL- and CMOS-compatible logic levels
  • Brownout detection
  • Low power modes
  • Power-down mode with external interrupt wake-up
  • Idle mode
  • PLCC44 and TQFP44 packages


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