TS80C51U2
TS83C51U2
TS87C51U2
5. SFR Mapping
The Special Function Registers (SFRs) of the TS80C51U2 fall into the following categories:
•
C51 core registers: ACC, B, DPH, DPL, PSW, SP, AUXR1
•
I/O port registers: P0, P1, P2, P3
•
Timer registers: T2CON, T2MOD, TCON, TH0, TH1, TH2, TMOD, TL0, TL1, TL2, RCAP2L, RCAP2H
•
Serial I/O port registers for UART_0: SADDR_0, SADEN_0, SBUF_0, SCON_0
•
Serial I/O port registers for UART_1: SADDR_1, SADEN_1, SBUF_1, SCON_1
•
Baud Rate Generator registers: BRL, BDRCON, BDRCON_1
•
Power and clock control registers: PCON
•
HDW Watchdog Timer Reset: WDTRST, WDTPRG
•
Interrupt system registers: IE, IP, IPH
•
Others: AUXR, CKCON
Table 2. All SFRs with their address and their reset value
Bit
address-
able
0/8
1/9
2/A
3/B
Non Bit addressable
4/C
5/D
6/E
7/F
F8h
F0h
E8h
E0h
D8h
D0h
C8h
C0h
B8h
B0h
A8h
A0h
98h
90h
88h
80h
PSW
0000 0000
T2CON
0000 0000
SCON_1
0000 0000
IP
X000 0000
P3
1111 1111
IE
0X00 0000
P2
1111 1111
SCON_0
0000 0000
P1
1111 1111
TCON
0000 0000
P0
1111 1111
0/8
TMOD
0000 0000
SP
0000 0111
1/9
TL0
0000 0000
DPL
0000 0000
2/A
TL1
0000 0000
DPH
0000 0000
3/B
4/C
5/D
6/E
TH0
0000 0000
TH1
0000 0000
AUXR
00XX XXX0
CKCON
XXXX XXX0
PCON
00X1 0000
7/F
SBUF_0
XXXX XXXX
SADDR_0
0000 0000
SADDR_1
0000 0000
AUXR1
XXXX XXX0
BRL
0000 0000
BDRCON
0XXX 0000
BDRCON_1
0X00 00XX
WDTRST
XXXX XXXX
WDTPRG
XXXX X000
T2MOD
XXXX XX00
SBUF_1
XXXX XXXX
SADEN_0
0000 0000
SADEN_1
0000 0000
IPH
X000 0000
RCAP2L
0000 0000
RCAP2H
0000 0000
TL2
0000 0000
TH2
0000 0000
ACC
0000 0000
B
0000 0000
FFh
F7h
EFh
E7h
DFh
D7h
CFh
C7h
BFh
B7h
AFh
A7h
9Fh
97h
8Fh
87h
reserved
4
Rev. D - 15 January, 2001
ATMEL [ ATMEL CORPORATION ]
