Special Function Register
F8
F0
E8
E0
D8
D0
C8
C0
B8
B0
A8
A0
98
B
P4
ACC
WDTCR
IFD
IFADRH
IFADRL
TL2
IFMT
TH2
SCMD
ISPCR
IPH
PSW
T2CON
XICON
IP
P3
IE
P2
SCON
P1
TCON
P0
T2MOD
SADEN
SADDR
SBUF
RCAP2L
RCAP2H
AUXR1
90
88
80
Reserved
TL1
DPH
TMOD
SP
TL0
DPL
TH0
TH1
AUXR
PCON
SYMBOL
P0
SP
DESCRIPTION
Port 0
INITIAL VALUE
11111111B
00000111B
00000000B
00000000B
01110000B
00000000B
00000000B
00000000B
00000000B
00000000B
00000000B
xxxxx00B
11111111B
00000000B
xxxxxxxxB
11111111B
xxxx0xx0B
00000000B
00000000B
11111111B
x0000000B
x0000000B
00000000B
Stack Pointer
Data Pointer Low
Data Pointer High
Power Control
Timer Control
Timer Mode
Timer Low 0
Timer Low 1
Timer High 0
Timer High 1
Auxiliary
Port 1
Serial Control
Serial Buffer
Port 2
Auxiliary 1
Interrupt Enable
Slave Address
Port 3
Interrupt Priority High
Interrupt Priority Low
Slave Address Mask
External Interrupt Control
Timer 2 Control
Timer2 mode
DPL
DPH
PCON
TCON
TMOD
TL0
TL1
TH0
TH1
AUXR
P1
SCON
SBUF
P2
AUXR1
IE
SADDR
P3
IPH
SMOD SMOD0
-
POF GF1 GF0 PD
IDL
IT0
M0
TF1
GATE
TR1
C//T
TF0 TR0
M1 M0 GATE C//T
IE1
IT1
IE0
M1
ERAM AO
T2EX T2
TI
SM0 /FE M1
SM2 REN TB8 RB8
RI
GF2
ET1
DPS
EX1 ET0 EX0
EA
ET2 ES
RD
PX3H PX2H PT2H PSH PT1H PX1H PT0H PX0H
PT2 PS PT1 PX1 PT0 PX0
WR
T1
T0
INT1 INT0 TXD RXD
IP
SADEN
XICON
T2CON
T2MOD
PX3
TF2
EX3
IE3
IT3
PX2 EX2 IE2
IT2
EXF2 RCLK TCLK EXEN2 TR2 C/T2 CP/RL
T2OE DCEN
00000000B
xxxxxx00B
00000000B
00000000B
00000000B
00000000B
00000000B
00000000B
xx000000B
RCAP2L Timer2 Capture Low
RCAP2H Timer2 Capture High
TL2
TH2
PSW
ACC
Timer Low 2
Timer High 2
Program Status Word
Accumulator
Watch-dog-timer Control
register
CY
-
AC
-
F0 RS1 RS0
OV
-
P
WDTCR
ENW CLW WIDL PS2 PS1 PS0
IFD
ISP Flash data
11111111B
00000000B
00000000B
xxxxx000B
xxxxxxxxB
000xx000B
xxxx1111B
00000000B
IFADRH
IFADRL
IFMT
SCMD
ISPCR
P4
ISP Flash Address High
ISP Flash Address Low
ISP Mode Table
ISP Serial Command
ISP Control Register
Port 4
-
-
-
-
-
-
MS2 MS1 MS0
ICK2 ICK1 ICK0
ISPEN
-
BS SRST
-
-
-
-
EBH EAH E9H E8H
B
B Register
8
MPC89x51A Data Sheet
MEGAWIN
MEGAWIN [ MEGAWIN TECHNOLOGY CO., LTD ]
