s87c751-5a28 NXP Semiconductors, s87c751-5a28 Datasheet - Page 11

• Manufacturer Part Number: s87c751-5a28
• Description: 80c51 8-bit Microcontroller Family 2k/64 Otp/rom, I2c, Low Pin Count
• Manufacturer: NXP Semiconductors

*
# SFRs are modified from or added to the 80C51 SFRs.
Philips Semiconductors
Table 3.
1998 May 01
SYMBOL
ACC*
B*
DPTR:
I
I
I
I
IE*#
P0*#
P1*
P3*
PCON#
PSW*
SP
TCON*#
TL#
TH#
RTL#
RTH#
2
2
2
2
DPH
DPL
80C51 8-bit microcontroller family
2K/64 OTP/ROM, I
CFG*#
CON*#
DAT#
STA*#
SFRs are bit addressable.
Accumulator
B register
Data pointer
High byte
Low byte
I
I
I
I
Interrupt enable
Port 0
Port 1
Port 3
Power control
Program status word
Stack pointer
Timer/counter control
Timer low byte
Timer high byte
Timer low reload
Timer high reload
2
2
2
2
C configuration
C control
C data
C status
8XC751 Special Function Registers
(2 bytes)
DESCRIPTION
2
ADDRESS
C, low pin count
DIRECT
D8H/RD
98H/RD
99H/RD
ABH
E0H
F0H
F8H
B0H
D0H
8AH
8CH
8BH
8DH
83H
82H
80H
90H
87H
81H
88H
WR
WR
WR
MSB
SLAVEN
SLAVEN
RDAT
RDAT
XDAT
GATE
CXA
DF
EA
CY
E7
F7
9F
FF
AF
T0
B7
D7
8F
97
–
–
–
BIT ADDRESS, SYMBOL, OR ALTERNATIVE PORT FUNCTION
MASTRQ
MASTRQ
IDLE
IDLE
INT1
ATN
C/T
DE
FE
AE
D6
AC
E6
F6
9E
96
B6
8E
X
0
–
–
–
XDATA
CLRTI
DRDY
CDR
INT0
11
DD
FD
AD
E5
F5
9D
B5
D5
F0
8D
TF
95
0
0
X
–
–
–
XACTV
TIRUN
TIRUN
CARL
ARL
RS1
DC
FC
AC
EI2
TR
E4
9C
B4
D4
8C
F4
94
0
X
–
–
–
MAKSTR
CSTR
STR
RS0
ET1
IE0
DB
AB
E3
F3
9B
FB
B3
D3
8B
93
X
–
–
0
–
–
–
MAKSTP
CSTP
STP
EX1
DA
AA
OV
IT0
E2
9A
FA
B2
D2
8A
F2
82
92
–
–
0
X
–
–
–
MASTER
XSTR
XSTR
83C751/87C751
SDA
CT1
CT1
ET0
PD
IE1
E1
D9
A9
B1
D1
F1
99
F9
81
91
89
0
X
–
–
XSTP
XSTP
CT0
CT0
EX0
SCL
Product specification
IDL
LSB
IT1
E0
F0
D8
F8
A8
B0
D0
98
80
90
88
X
P
–
0
–
00H
00H
00H
00H
0000xx00B
81H
80H
x0100000B
00H
xxxxx111B
FFH
FFH
xxxxxx00B
00H
07H
00H
00H
00H
00H
00H
RESET
VALUE