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Datasheet |
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P87C51RA2/RB2/RC2/RD2; 80C51 8-bit microcontroller family Datasheet |
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A summary of the datasheet is shown below. Get the full datasheet as a PDF. 
The devices are Single-Chip 8-Bit Microcontrollers manufactured in an advanced CMOS process and are derivatives of the 80C51 microcontroller family. The instruction set is 100% compatible with the 80C51 instruction set.
The devices support 6-clock/12-clock mode selection by programming an OTP bit (OX2) using parallel programming. In addition, an SFR bit (X2) in the clock control register (CKCON) also selects between 6-clock/12-clock mode.
The devices also have four 8-bit I/O ports, three 16-bit timer/event counters, a multi-source, four-priority-level, nested interrupt structure, an enhanced UART and on-chip oscillator and timing circuits.
The added features of the P87C51RA2/RB2/RC2/RD2 make it a powerful microcontroller for applications that require pulse width modulation, high-speed I/O and up/down counting capabilities such as motor control.
Features
-80C51 Central Processing Unit
-8 kbytes OTP (87C51RA2)
-16 kbytes OTP (87C51RB2)
-32 kbytes OTP (87C51RC2)
-64 kbytes OTP (87C51RD2)
-512 byte RAM (87C51RA2/RB2/RC2)
-1 kbyte RAM (87C51RD2)
-Boolean processor
-Fully static operation
-Low voltage (2.7 V to 5.5 V at 16 MHz) operation
-12-clock operation with selectable 6-clock operation (via software or via parallel programmer)
-Memory addressing capability
-Up to 64 kbytes ROM and 64 kbytes RAM
-Power control modes:
-Clock can be stopped and resumed
-Idle mode
-Power-down mode
-CMOS and TTL compatible
-Two speed ranges at V CC = 5 V
-0 to 30 MHz with 6-clock operation
-0 to 33 MHz with 12-clock operation
-Parallel programming with 87C51 compatible hardware interface to programmer
-RAM expandable externally to 64 kbytes
-Programmable Counter Array (PCA)
-PWM
-Capture/compare
-PLCC, LQFP, or DIP package
-Extended temperature ranges
-Dual Data Pointers
-Security bits (3 bits)
-Encryption array - 64 bytes
-Seven interrupt sources
-4 interrupt priority levels
-Four 8-bit I/O ports
-Full-duplex enhanced UART
-Framing error detection
-Automatic address recognition
-Three 16-bit timers/counters T0, T1 (standard 80C51) and additional T2 (capture and compare)
-Programmable clock-out pin
-Asynchronous port reset
-Low EMI (inhibit ALE, slew rate controlled outputs, and 6-clock mode)
-Wake-up from Power Down by an external interrupt
See the full datasheet as a PDF
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