DS87C520/DS83C520
SPECIAL FUNCTION REGISTER LOCATIONS
Table 2
*
New functions are in bold
REGISTER
P0
SP
DPL
DPH
DPL1
DPH1
DPS
PCON
TCON
TMOD
TL0
TL1
TH0
TH1
CKCON
PORT1
EXIF
SCON0
SBUF0
P2
IE
SADDR0
SADDR1
P3
IP
SADEN0
SADEN 1
SCON1
SBUF1
ROMSIZE
PMR
STATUS
TA
T2CON
T2MOD
RCAP2L
RCAP2H
TL2
TH2
PSW
WDCON
ACC
EIE
B
EIP
BIT 7
P0.7
BIT 6
P0.6
BIT 5
P0.5
BIT 4
P0.4
BIT 3
P0.3
BIT 2
P0.2
BIT 1
P0.1
BIT 0
P0.0
ADDRESS
80h
81h
82h
83h
84h
85h
86h
87h
88h
89h
8Ah
8Bh
8Ch
8Dh
8Eh
90h
91h
98h
99h
A0h
A8h
A9h
AAh
B0h
B8h
B9h
BAh
C0h
C1h
C2h
C4h
C5h
C7h
C8h
C9h
CAh
CBh
CCh
CDh
D0h
D8h
E0h
E8h
F0h
F8h
0
SMOD_0
TF1
GATE
0
SMOD0
TR1
C/
T
0
-
TF0
M1
0
-
TR0
M0
0
GF1
IE1
GATE
0
GF0
IT1
C/
T
0
STOP
IE0
M1
SEL
IDLE
IT0
M0
WD1
P1.7
IE5
SM0/FE_0
P2.7
EA
WD0
P1.6
IE4
SM1_0
P2.6
ES1
T2M
P1.5
IE3
SM2_0
P2.5
ET2
T1M
P1.4
IE
REN_0
P2.4
ES0
T0M
P1.3
XT/
RG
TB8_0
P2.3
ET1
MD2
P1.2
RGMD
RB8_0
P2.2
EX1
MD1
P1.1
RGSL
TI_0
P2.1
ET0
MD0
P1.0
BGS
RI_0
P2.0
EX0
P3.7
-
P3.6
PS1
P3.5
PT2
P3.4
PS0
P3.3
PT1
P3.2
PX1
P3.1
PT0
P3.0
PX0
SM0/FE_1
SB7
-
CD1
PIP
TF2
-
SM1_1
SB6
-
CD0
HIP
EXF2
-
SM2_1
SB5
-
SWB
LIP
RCLK
-
REN_1
SB4
-
-
XTUP
TCLK
-
TB8_1
SB3
-
XTOFF
SPTA1
EXEN2
-
RB8_1
SB2
RMS2
ALEOFF
SPTA1
TR2
-
TI_1
SB1
RMS1
DME1
SPTA0
C/
T2
T2OE
R1_1
SB0
RMS0
DME0
SPRA0
C/
RL2
DCEN
CY
SMOD_1
-
-
AC
POR
-
-
F0
EPFI
-
-
RS1
PFI
EWDI
PWDI
RS0
WDIF
EX5
PX5
OV
WTRF
EX4
PX4
FL
EWT
EX3
PX3
P
RWT
EX2
PX2
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DALLAS [ DALLAS SEMICONDUCTOR ]
