IS80C52
IS80C32
Table 2: Special Function Register
Symbol
ACC
(1)
B
(1)
DPH
DPL
IE
IP
(1)
ISSI
Description
Accumulator
B register
Direct Address
E0H
F0H
83H
82H
A8H
B8H
80H
AF
EA
BF
—
87
P0.7
AD7
97
P1.7
—
AE
—
BE
—
86
P0.6
AD6
96
P1.6
—
AD
ET2
BD
PT2
85
P0.5
AD5
95
P1.5
—
AC
ES
BC
PS
84
P0.4
AD4
94
P1.4
—
AB
ET1
BB
PT1
83
P0.3
AD3
93
P1.3
—
AA
EX1
BA
PX1
82
P0.2
AD2
92
P1.2
—
A9
ET0
B9
PT0
A8
EX0
B8
PX0
E7
F7
Bit Address, Symbol, or Alternative Port Function
E6
F6
E5
F5
E4
F4
E3
F3
E2
F2
E1
F1
E0
F0
®
Reset Value
00H
00H
00H
00H
0X000000B
XX000000B
FFH
Data pointer (DPTR) high
Data pointer (DPTR) low
Interrupt enable
Interrupt priority
Port 0
(1)
P0
(1)
P1
(1)
Port 1
90H
81
80
P0.1 P0.0
AD1 AD0
91
90
P1.1 P1.0
T2EX T2
FFH
P2
(1)
Port 2
A0H
A7
A6
P2.7 P2.6
AD15 AD14
B7
P3.7
A5
A4
A3
A2
A1
A0
P2.5 P2.4 P2.3 P2.2 P2.1 P2.0
AD13 AD12 AD11 AD10 AD9 AD8
B5
P3.5
T1
—
D5
F0
9D
SM2
B4
P3.4
T0
—
D4
RS1
9C
REN
FFH
P3
(1)
Port 3
Power control
Program status word
Serial data buffer
Serial controller
Stack pointer
Timer control
Timer mode
Timer/Counter 2
Timer high 0
Timer high 1
Timer high 2
Timer low 0
Timer low 1
Capture high
Capture low
Timer low 2
B0H
87H
D0H
99H
98H
81H
88H
89H
C8H
8CH
8DH
CDH
8AH
8BH
CAH
CBH
CCH
RD
B6
P3.6
WR
—
D6
AC
INT1
GF1
D3
RS0
9B
TB8
B3
P3.3
PCON
PSW
(1)
SBUF
SCON
SP
(1)
SMOD
D7
CY
9F
SM0
B2
B1
B0
P3.2 P3.1 P3.0
INT0
TXD RXD
GF0 PD IDL
D2
D1
D0
OV
—
P
9A
RB8
99
TI
98
RI
FFH
0XXX0000B
00H
XXXXXXXXB
00H
07H
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
9E
SM1
TCON
TMOD
(1)
T2CON
(1,2)
TH0
TH1
TH2
(2)
TL0
TL1
RCAP2H
(2)
RCAP2L
(2)
TL2
(2)
8F
8E
8D
8C
8B
8A
89
88
TF1 TR1
TF0 TR0 IE1
IT1 IE0 IT0
GATE C/
T
M1
M0 GATE C/
T
M1 M0
CF
CE
CD
CC
CB
CA C9
C8
TF2 EXF2 RCLK TCLK EXEN2 TR2 C/
T2
CP/
RL2
Notes:
1. Denotes bit addressable.
2. SFRs are added to the 80C51 SFRs.
10
Integrated Silicon Solution, Inc. — 1-800-379-4774
MC004-1D
11/19/98
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
