Philips Semiconductors
Product specification
80C51 8-bit microcontroller family
8K–64K/256–1K OTP/ROM/ROMless, low voltage (2.7V–5.5V),
low power, high speed (33 MHz)
8XC52/54/58/80C32
8XC51FA/FB/FC/80C51FA
8XC51RA+/RB+/RC+/RD+/80C51RA+
DESCRIPTION
Three different Single-Chip 8-Bit Microcontroller families are
presented in this datasheet:
FEATURES
•
80C32/8XC52/8XC54/8XC58
•
80C51FA/8XC51FA/8XC51FB/8XC51FC
•
80C51RA+/8XC51RA+/8XC51RB+/8XC51RC+/8XC51RD+
For applications requiring 4K ROM/EPROM, see the 8XC51/80C31
8-bit CMOS (low voltage, low power, and high speed)
microcontroller families datasheet.
All the families are Single-Chip 8-Bit Microcontrollers manufactured
in advanced CMOS process and are derivatives of the 80C51
microcontroller family. All the devices have the same instruction set
as the 80C51.
These devices provide architectural enhancements that make them
applicable in a variety of applications for general control systems.
ROM/EPROM
Memory Size
(X by 8)
80C31/8XC51
0K/4K
80C32/8XC52/54/58
0K/8K/16K/32K
256
No
No
128
No
No
RAM Size
(X by 8)
Programmable
Timer Counter
(PCA)
Hardware
Watch Dog
Timer
•
80C51 Central Processing Unit
•
Speed up to 33MHz
•
Full static operation
•
Operating voltage range: 2.7V to 5.5V @ 16MHz
•
Security bits:
–
ROM – 2 bits
–
OTP–EPROM – 3 bits
•
Encryption array – 64 bytes
•
RAM expandable to 64K bytes
•
4 level priority interrupt
•
6 or7 interrupt sources, depending on device
•
Four 8-bit I/O ports
•
Full-duplex enhanced UART
–
Framing error detection
–
Automatic address recognition
•
Power control modes
–
Clock can be stopped and resumed
–
Idle mode
–
Power down mode
80C51FA/8XC51FA/FB/FC
0K/8K/16K/32K
256
Yes
No
80C51RA+/8XC51RA+/RB+/RC+
0K/8K/16K/32K
8XC51RD+
64K
1024
Yes
Yes
512
Yes
Yes
•
Programmable clock out
•
Second DPTR register
•
Asynchronous port reset
•
Low EMI (inhibit ALE)
The ROMless devices, 80C32, 80C51FA, and 80C51RA+ can
address up to 64K of external memory. All the devices 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. For systems that require
extra memory capability up to 64k bytes, each can be expanded
using standard TTL-compatible memories and logic.
Its added features make it an even more powerful microcontroller for
applications that require pulse width modulation, high-speed I/O and
up/down counting capabilities such as motor control. It also has a
more versatile serial channel that facilitates multiprocessor
communications.
1999 Apr 01
2
853-2068 21142
PHILIPS [ NXP SEMICONDUCTORS ]
