Philips Semiconductors
Preliminary specification
80C51 8-bit microcontroller
8K/256 OTP, 8 channel 10 bit A/D, I
2
C, PWM,
capture/compare, high I/O, low voltage (2.7V–5.5V), low power
P87C552
SYMBOL
DESCRIPTION
DIRECT
ADDRESS
BIT ADDRESS, SYMBOL, OR ALTERNATIVE PORT FUNCTION
MSB
LSB
RESET
VALUE
P1M1
P1M2
P2M1
P2M2
P3M1
P3M2
P4M1
P4M2
PCON
PSW
PWMP#
PWM1#
PWM0#
RTE#
S0ADDR
S0ADEN
S0BUF
Port 1 output mode 1
Port 1 output mode 2
Port 2 output mode 1
Port 2 output mode 2
Port 3 output mode 1
Port 3 output mode 2
Port 4 output mode 1
Port 4 output mode 2
Power control
Program status word
PWM prescaler
PWM register 1
PWM register 0
Reset/toggle enable
Serial 0 slave address
Slave address mask
Serial 0 data buffer
92H
93H
94H
95H
9AH
9BH
9CH
9DH
87H
D0H
FEH
FDH
FCH
EFH
F9H
B9H
99H
9F
9E
SM1
9D
SM2
9C
REN
SLAVE ADDRESS
9B
TB8
9A
RB8
99
TI
98
RI
GC
TP47
TP46
RP45
RP44
RP43
RP42
RP41
RP40
SMOD1
CY
SMOD0
AC
POF
FO
WLE
RS1
GF1
RS0
GFO
OV
PD
F1
IDL
P
xx000000B
xx000000B
00H
00H
00H
00H
00H
00H
00x00000B
00H
00H
00H
00H
00H
00H
00H
xxxxxxxxB
S0CON*
S1ADR#
SIDAT#
S1STA#
Serial 0 control
Serial 1 address
Serial 1 data
Serial 1 status
98H
DBH
DAH
D9H
SM0/FE
00H
00H
00H
SC4
DF
SC3
DE
ENS1
SC2
DD
STA
SC1
DC
ST0
SC0
DB
SI
0
DA
AA
0
D9
CR1
0
D8
CR0
F8H
SICON#*
SP
STE#
TH1
TH0
TL1
TL0
TMH2#
TML2#
TMOD
Serial 1 control
Stack pointer
Set enable
Timer high 1
Timer high 0
Timer low 1
Timer low 0
Timer high 2
Timer low 2
Timer mode
D8H
81H
EEH
8DH
8CH
8BH
8AH
EDH
ECH
89H
CR2
00H
07H
TG47
TG46
SP45
SP44
SP43
SP42
SP41
SP40
C0H
00H
00H
00H
00H
00H
00H
GATE
8F
C/T
8E
TR1
T2IS0
CE
CMI2
M1
8D
TF0
T2ER
CD
CMI1
M0
8C
TR0
T2B0
CC
CMI0
GATE
8B
IE1
T2P1
CB
CTI3
C/T
8A
IT1
T2P0
CA
CTI2
M1
89
IE0
T2MS1
C9
CTI1
M0
88
IT0
T2MS0
C8
CTI0
00H
TCON*
TM2CON#
Timer control
Timer 2 control
88H
EAH
TF1
T2IS1
CF
00H
00H
TM2IR#*
T3#
Timer 2 int flag reg
Timer 3
C8H
FFH
T20V
00H
00H
* SFRs are bit addressable.
# SFRs are modified from or added to the 80C51 SFRs.
1999 Mar 30
8
PHILIPS [ NXP SEMICONDUCTORS ]
