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GENERAL DESCRIPTION
The term P83CL78x is used throughout this data sheet to refer to both the P83CL781 and P83CL782; differences between the devices are highlighted in the text.
The P83CL78x is manufactured in an advanced CMOS technology. The P83CL78x has the same instruction set as the 80C51, consisting of over 100 instructions: 49 one-byte, 46 two-byte, and 16 three-byte. The device has low power consumption and a wide range of supply voltage; there are two software-selectable modes of reduced activity for further power reduction: Idle and Power-down. For emulation purposes, the P85CL781 (piggy-back version) with 256 bytes of RAM is recommended.FEATURES
• Full static 80C51 CPU
• 8-bit CPU, ROM, RAM, I/O in a 40-lead DIP or 44-lead QFP package
• 16 kbytes ROM, expandable externally to 64 kbytes
• 256 bytes RAM, expandable externally to 64 kbytes
• Four 8-bit ports, 32 I/O lines
• Three 16-bit timer/event counters
• External memory expandable up to 128 kbytes: RAM up to 64 kbytes and ROM up to 64 kbytes
• On-chip oscillator suitable for RC, LC, quartz crystal or ceramic resonator
• Fifteen source, fifteen vector interrupt structure with two priority levels
• Full duplex serial port (UART)
• I2C-bus interface for serial transfer on two lines
• Enhanced architecture with:
– non-page oriented instructions
– direct addressing
– four 8 byte RAM register banks
– stack depth limited only by available internal RAM (maximum 256 bytes)
– multiply, divide, subtract and compare instructions
• Reduced power consumption through Power-down and Idle modes
• Wake-up via external interrupts at Port 1
• Single supply voltage of 1.8 to 6.0 V
• Operating ambient temperature:
– 83CL781: −40 to +85 °C
– 83CL782: −25 to +55 °C.
• Frequency range of DC to 12 MHz
• Very low current consumption.APPLICATIONS
The P83CL78x is an 8-bit general purpose microcontroller especially suited for cordless telephone applications. The P83CL78x also functions as an arithmetic processor having facilities for both binary and BCD arithmetic plus bit- handling capabilities.
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