P87CL881H

Features:

` Full static 80C51 CPU; enhanced 8-bit architecture with:
  Minimum 6 cycles per instruction (twice as fast as a standard 80C51 core)
  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.
` Very low current consumption
` Single supply voltage of 2.7 to 3.6 V
` Frequency: 1 to 10 MHz
` Operating temperature: -25 to +70 °C
` 44-pin LQFP package
` Four 8-bit ports (32 I/O lines)
` 63-kbyte One-Time Programmable (OTP) program memory; programmable in parallel mode or in-system via I2C-bus interface.
` 256-byte internal RAM
` 1792-byte internal AUX-RAM
` External address range: 64 kbytes of ROM and 64 kbytes of RAM
` Amplitude Controlled Oscillator (ACO) suitable for use with a quartz crystal or ceramic resonator
` Improved Power-on/Power-off reset circuitry (POR)
` Low Voltage Detection (LVD) with 11 software programmable levels
` 8 interrupts on Port 1, edge or level sensitive triggering selectable via software power-saving use for keyboard control
` Twenty source, twenty vector interrupt structure with two priority levels
` Wake-up from Power-down mode via LVD or external interrupts at Port 1
` Two 16-bit timer/event counters
` Additional 16-bit timer/event counters, with capture, compare and PWM function
` Watchdog Timer
` Full duplex enhanced UART with double buffering
` I2C-bus interface for serial transfer on two lines, maximum operating frequency 400 kHz.



Pinout




Description

The P87CL881 is an 8-bit microcontroller especially suited for pager applications.

The P87CL881 is manufactured in an advanced CMOS technology and is based on single chip technology. The device is optimized for low power consumption and has two software selectable features of P87CL881 for power reduction: Idle and Power-down modes. In addition, all derivative blocks switch off their clock if they are inactive.

The instruction set of the P87CL881 is based on that of the 80C51. The P87CL881 also functions as an arithmetic processor having facilities for both binary and BCD arithmetic plus bit-handling capabilities. The instruction set consists of over 100 instructions: 49 one-byte, 46 two-byte, and 16 three-byte.

This data sheet details the specific properties of the P87CL881; for details of the P87CL881 core and the derivative functions see the "TELX family" data sheet and "8051-Based 8-bit Microcontrollers; Data Handbook IC20".