Philips Semiconductors
Product data
80C51 8-bit microcontroller family
8KB/16KB/32KB/64KB OTP
with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high
speed (30/33 MHz)
P87C51RA2/RB2/RC2/RD2
DESCRIPTION
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.
•
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
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
•
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)
•
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
•
Programmable clock-out pin
•
Asynchronous port reset
•
Low EMI (inhibit ALE, slew rate controlled outputs, and 6-clock
mode)
•
Power control modes:
–
Clock can be stopped and resumed
–
Idle mode
–
Power-down mode
•
Wake-up from Power Down by an external interrupt
2003 Jan 24
2
853–2391 29335
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