SFR

memory


80	P0	11111111
81	SP	00000111
82	DP0L	00000000
83	DP0H	00000000
84	DP1L	00000000
85	DP1H	00000000
87	PCON	0xxx0000
88	TCON	00000000
89	TMOD	00000000
8A	TL0	00000000
8B	TL1	00000000
8C	TH0	00000000
8D	TH1	00000000
8E	AUXR	xxx00xx0 Auxiliary Register
90	P1	11111111
98	SCON	00000000
99	SBUF	xxxxxxxx
A0	P2	11111111
A2	AUXR1	xxxxxxx0 Auxiliary Regsister 1
A6	WDTRST	xxxxxxxx
A8	IE	0x000000
B0	P3	11111111
B8	IP	xx000000
C8	T2CON	00000000 Timer/Counter 2 Control Register
C9	T2MOD	xxxxxx00
CA	RCAP2L	00000000
CB	RCAP2H	00000000
CC	TL2	00000000
CD	TH2	00000000
D0	PSW	00000000
E0	ACC	00000000
F0	B	00000000

Bit Addressing

00 – 7FH are assigned to RAM locations of 20 – 2FH.
80 – 87H are assigned to the PO port.
88 – 8FH are assigned to the TCON register.
90 – 97H are assigned to the P1 port.
98 – 9FH are assigned to the SCON register.
AO – A7H are assigned to the P2 port.
A8 – AFH are assigned to the IE register.
BO – B7H are assigned to the P3 port.
B8 – BFH are assigned to IP.
CO – CFH (not assigned)
DO – D7H are assigned to the PSW register.
D8 – DFH (not assigned)
EO – E7H are assigned to the Accumulator register.
E8 – EFH (not assigned)
FO – F7H are assigned to the B register.

memory


80b	P0.0
81b	P0.1
82b	P0.2
83b	P0.3
84b	P0.4
85b	P0.5
86b	P0.6
87b	P0.7
88b	TCON.0
89b	TCON.1
8Ab	TCON.2
8Bb	TCON.3
8Cb	TCON.4
8Db	TCON.5
8Eb	TCON.6
8Fb	TCON.7
90b	P1.0
91b	P1.1
92b	P1.2
93b	P1.3
94b	P1.4
95b	P1.5
96b	P1.6
97b	P1.7
98b	SCON.0
99b	SCON.1
9Ab	SCON.2
9Bb	SCON.3
9Cb	SCON.4
9Db	SCON.5
9Eb	SCON.6
9Fb	SCON.7
A0b	P2.0
A1b	P2.1
A2b	P2.2
A3b	P2.3
A4b	P2.4
A5b	P2.5
A6b	P2.6
A7b	P2.7
A8b	IE.0
A9b	IE.1
AAb	IE.2
ABb	IE.3
ACb	IE.4
ADb	IE.5
AEb	IE.6
AFb	IE.7
B0b	P3.0
B1b	P3.1
B2b	P3.2
B3b	P3.3
B4b	P3.4
B5b	P3.5
B6b	P3.6
B7b	P3.7
B8b	IP.0
B9b	IP.1
BAb	IP.2
BBb	IP.3
BCb	IP.4
BDb	IP.5
BEb	IP.6
BFb	IP.7
D0b	PSW.0
D1b	PSW.1
D2b	PSW.2
D3b	PSW.3
D4b	PSW.4
D5b	PSW.5
D6b	PSW.6
D7b	PSW.7
E0b	ACC.0
E1b	ACC.1
E2b	ACC.2
E3b	ACC.3
E4b	ACC.4
E5b	ACC.5
E6b	ACC.6
E7b	ACC.7
F0b	B.0
F1b	B.1
F2b	B.2
F3b	B.3
F4b	B.4
F5b	B.5
F6b	B.6
F7b	B.7