DESCRIPTION
The 80CL51 is manufactured in an advanced CMOS technology. The instruction set of the 80CL51 is based on that of the 8051. The 80CL51 is a general purpose microcontroller especially suited for battery-powered applications.
   
FEATURES
• Full static 80C51 CPU
• 8-bit CPU, ROM, RAM, 1/0 in a single 40-lead DIL / mini-pack
• 4K x 8 ROM, expandable externally to 64K bytes
• 128 bytes RAM, expandable externally to 64K bytes
• Four 8-bit ports, 321/0 lines
• Two 16-bit timer / event counters
• External memory expandable up to 128K, external ROM up to 64K and / or RAM up to 64K
• On-chip oscillator suitable for RC, LC, quartz crystal or ceramic resonator
• Thirteen source, thirteen vector interrupt structure with two priority levels
• Full duplex serial port (UART)
• Enhanced architecture with:
    – non-page oriented instructions
    – direct addressing
    – four eight byte RAM register banks
    – stack depth up to 128 bytes
    – multiply, divide, subtract and compare instructions
• Power-Down and IDLE instructions
• Wake-up via external interrupts at Port 1
• Single supply voltage of 1.8V to 6.0V (5.0V ±10% for P80C51)
• Frequency range of 0 to 16MHz (3.5MHz to 16MHz for P80C51)
• Very low current consumption
• Operating temperature range: -40 to +85°C