P87C51RB2

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


Pinout




Specifications

PARAMETER	RATING	UNIT
Operating temperature under bias	0 to +70 or 40 to +85	°C
Storage temperature range	65 to +150	°C
Voltage on EA/VPP pin to VSS	0 to +13.0	V
Voltage on any other pin to VSS4	0.5 to +6.0	V
Maximum IOL per I/O pin	15	mA
Power dissipation (based on package heat transfer limitations, not device power consumption)	1.5	W

NOTES:
1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any conditions other than those described in the AC and DC Electrical Characteristics section of this specification is not implied.
2. This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive static charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maximum.
3. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless otherwise noted.
4. Transient voltage only.


Description

The P87C51RA2/RB2/RC2/RD2 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 P87C51RA2/RB2/RC2/RD2 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 P87C51RA2/RB2/RC2/RD2 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.