INTEGRATED CIRCUITS
8XC54/58
8XC51FA/FB/FC/80C51FA
8XC51RA+/RB+/RC+/RD+/80C51RA +
80C51 8-bit microcontroller family
8K–64K/256–1K OTP/ROM/ROMless,
low voltage (2.7V–5.5V), low power, high speed (33 MHz)
Product specification
Replaces datasheet 8XC52/54/58/80C32
8XC51FA/FB/FC/80C51FA
8XC51RA+/RB+/RC+/RD+/80C51RA + of 1999 Apr 01
2000 Aug 07
Philips
Semiconductors
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)
8XC54/58
8XC51FA/FB/FC/80C51FA
8XC51RA+/RB+/RC+/RD+/80C51RA+
DESCRIPTION
Three different Single-Chip 8-Bit Microcontroller families are
presented in this datasheet:
FEATURES
•
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
8XC54/58
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 33 MHz
•
Full static operation
•
Operating voltage range: 2.7 V to 5.5 V @ 16 MHz
•
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, 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.
2000 Aug 07
2
853-2068 24292
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)
8XC54/58
8XC51FA/FB/FC/80C51FA
8XC51RA+/RB+/RC+/RD+/80C51RA+
BLOCK DIAGRAM
P0.0–P0.7
P2.0–P2.7
PORT 0
DRIVERS
V
CC
V
SS
RAM ADDR
REGISTER
RAM
PORT 0
LATCH
PORT 2
DRIVERS
PORT 2
LATCH
ROM/EPROM
8
B
REGISTER
STACK
POINTER
ACC
TMP2
TMP1
PROGRAM
ADDRESS
REGISTER
ALU
SFRs
TIMERS
PSW
P.C.A. (FA & RA+ only)
8
BUFFER
PC
INCRE-
MENTER
16
PROGRAM
COUNTER
PSEN
ALE/PROG
EAV
PP
RST
PD
TIMING
AND
CONTROL
INSTRUCTION
REGISTER
DPTR’S
MULTIPLE
PORT 1
LATCH
PORT 3
LATCH
OSCILLATOR
PORT 1
DRIVERS
XTAL1
XTAL2
P1.0–P1.7
PORT 3
DRIVERS
P3.0–P3.7
SU00831B
2000 Aug 07
3
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)
8XC54/58
8XC51FA/FB/FC/80C51FA
8XC51RA+/RB+/RC+/RD+/80C51RA+
LOGIC SYMBOL
V
CC
XTAL1
PORT 0
ADDRESS AND
DATA BUS
V
SS
PLASTIC LEADED CHIP CARRIER PIN FUNCTIONS
6
1
40
7
39
LCC
XTAL2
T2
T2EX
PORT 1
RST
EA/V
PP
PSEN
SECONDARY FUNCTIONS
ALE/PROG
RxD
TxD
INT0
INT1
T0
T1
WR
RD
17
29
18
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Function
NIC*
P1.0/T2
P1.1/T2EX
P1.2/ECI
P1.3/CEX0
P1.4/CEX1
P1.5/CEX2
P1.6/CEX3
P1.7/CEX4
RST
P3.0/RxD
NIC*
P3.1/TxD
P3.2/INT0
P3.3/INT1
Pin
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Function
P3.4/T0
P3.5/T1
P3.6/WR
P3.7/RD
XTAL2
XTAL1
V
SS
NIC*
P2.0/A8
P2.1/A9
P2.2/A10
P2.3/A11
P2.4/A12
P2.5/A13
P2.6/A14
28
Pin
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Function
P2.7/A15
PSEN
ALE/PROG
NIC*
EA/V
PP
P0.7/AD7
P0.6/AD6
P0.5/AD5
P0.4/AD4
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
V
CC
PORT 3
PORT 2
ADDRESS BUS
SU00830
PIN CONFIGURATIONS
DUAL IN-LINE PACKAGE PIN FUNCTIONS
T2/P1.0 1
T2EX/P1.1 2
ECI/P1.2 3
CEX0/P1.3 4
CEX1/P1.4 5
CEX2/P1.5 6
CEX3/P1.6 7
CEX4/P1.7 8
RST 9
RxD/P3.0 10
TxD/P3.1 11
INT0/P3.2 12
INT1/P3.3 13
T0/P3.4 14
T1/P3.5 15
WR/P3.6 16
RD/P3.7 17
XTAL2 18
XTAL1 19
V
SS
20
DUAL
IN-LINE
PACKAGE
40 V
CC
39 P0.0/AD0
38 P0.1/AD1
37 P0.2/AD2
36 P0.3/AD3
35 P0.4/AD4
34 P0.5/AD5
33 P0.6/AD6
32 P0.7/AD7
31 EA/V
PP
30 ALE/PROG
29 PSEN
28 P2.7/A15
27 P2.6/A14
26 P2.5/A13
25 P2.4/A12
24 P2.3/A11
23 P2.2/A10
22 P2.1/A9
21 P2.0/A8
* NO INTERNAL CONNECTION
SU00023
PLASTIC QUAD FLAT PACK
PIN FUNCTIONS
44
34
1
33
PQFP
11
23
12
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Function
P1.5/CEX2
P1.6/CEX3
P1.7/CEX4
RST
P3.0/RxD
NIC*
P3.1/TxD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P3.6/WR
P3.7/RD
XTAL2
XTAL1
Pin
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Function
V
SS
NIC*
P2.0/A8
P2.1/A9
P2.2/A10
P2.3/A11
P2.4/A12
P2.5/A13
P2.6/A14
P2.7/A15
PSEN
ALE/PROG
NIC*
EA/V
PP
P0.7/AD7
22
Pin
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Function
P0.6/AD6
P0.5/AD5
P0.4/AD4
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
V
CC
NIC*
P1.0/T2
P1.1/T2EX
P1.2/ECI
P1.3/CEX0
P1.4/CEX1
SU00021
* NO INTERNAL CONNECTION
SU00024
2000 Aug 07
4
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)
8XC54/58
8XC51FA/FB/FC/80C51FA
8XC51RA+/RB+/RC+/RD+/80C51RA+
PIN DESCRIPTIONS
PIN NUMBER
MNEMONIC
V
SS
V
CC
P0.0–0.7
DIP
20
40
39–32
LCC
22
44
43–36
QFP
16
38
37–30
TYPE
I
I
I/O
NAME AND FUNCTION
Ground:
0 V reference.
Power Supply:
This is the power supply voltage for normal, idle, and power-down operation.
Port 0:
Port 0 is an open-drain, bidirectional I/O port. Port 0 pins that have 1s written to
them float and can be used as high-impedance inputs. Port 0 is also the multiplexed
low-order address and data bus during accesses to external program and data memory. In
this application, it uses strong internal pull-ups when emitting 1s. Port 0 also outputs the
code bytes during program verification and received code bytes during EPROM
programming. External pull-ups are required during program verification.
Port 1:
Port 1 is an 8-bit bidirectional I/O port with internal pull-ups. Port 1 pins that have 1s
written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs,
port 1 pins that are externally pulled low will source current because of the internal pull-ups.
(See DC Electrical Characteristics: I
IL
). Port 1 also receives the low-order address byte
during program memory verification.
Alternate functions for 8XC51FX and 8XC51RX+ Port 1 include:
T2 (P1.0):
Timer/Counter 2 external count input/Clockout (see Programmable Clock-Out)
T2EX (P1.1):
Timer/Counter 2 Reload/Capture/Direction Control
ECI (P1.2):
External Clock Input to the PCA
CEX0 (P1.3):
Capture/Compare External I/O for PCA module 0
CEX1 (P1.4):
Capture/Compare External I/O for PCA module 1
CEX2 (P1.5):
Capture/Compare External I/O for PCA module 2
CEX3 (P1.6):
Capture/Compare External I/O for PCA module 3
CEX4 (P1.7):
Capture/Compare External I/O for PCA module 4
Port 2:
Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. Port 2 pins that have 1s
written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs,
port 2 pins that are externally being pulled low will source current because of the internal
pull-ups. (See DC Electrical Characteristics: I
IL
). Port 2 emits the high-order address byte
during fetches from external program memory and during accesses to external data memory
that use 16-bit addresses (MOVX @DPTR). In this application, it uses strong internal
pull-ups when emitting 1s. During accesses to external data memory that use 8-bit addresses
(MOV @Ri), port 2 emits the contents of the P2 special function register. Some Port 2 pins
receive the high order address bits during EPROM programming and verification.
Port 3:
Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that have 1s
written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs,
port 3 pins that are externally being pulled low will source current because of the pull-ups.
(See DC Electrical Characteristics: I
IL
). Port 3 also serves the special features of the 80C51
family, as listed below:
RxD (P3.0):
Serial input port
TxD (P3.1):
Serial output port
INT0 (P3.2):
External interrupt
INT1 (P3.3):
External interrupt
T0 (P3.4):
Timer 0 external input
T1 (P3.5):
Timer 1 external input
WR (P3.6):
External data memory write strobe
RD (P3.7):
External data memory read strobe
Reset:
A high on this pin for two machine cycles while the oscillator is running, resets the
device. An internal diffused resistor to V
SS
permits a power-on reset using only an external
capacitor to V
CC
.
Address Latch Enable/Program Pulse:
Output pulse for latching the low byte of the
address during an access to external memory. In normal operation, ALE is emitted at a
constant rate of 1/6 the oscillator frequency, and can be used for external timing or clocking.
Note that one ALE pulse is skipped during each access to external data memory. This pin is
also the program pulse input (PROG) during EPROM programming. ALE can be disabled by
setting SFR auxiliary.0. With this bit set, ALE will be active only during a MOVX instruction.
P1.0–P1.7
1–8
2–9
40–44,
1–3
I/O
1
2
3
4
5
6
7
8
P2.0–P2.7
21–28
2
3
4
5
6
7
8
9
24–31
40
41
42
43
44
1
2
3
18–25
I/O
I
I
I/O
I/O
I/O
I/O
I/O
I/O
P3.0–P3.7
10–17
11,
13–19
5,
7–13
I/O
10
11
12
13
14
15
16
17
RST
9
11
13
14
15
16
17
18
19
10
5
7
8
9
10
11
12
13
4
I
O
I
I
I
I
O
O
I
ALE/PROG
30
33
27
O
2000 Aug 07
5
FPGA/CPLD
