Table B-4. Special Function Registers
Register
SP
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Addr
81h
82h
83h
84h
85h
86h
87h
88h
89h
8Ah
8Bh
8Ch
8Dh
8Eh
8Fh
91h
92h
98h
99h
A8h
B8h
C0h
C1h
C8h
CAh
CBh
CCh
DPL0
DPH0
DPL1(1)
DPH1(1)
DPS(1)
0
0
-
0
1
0
1
0
0
0
SEL
IDLE
IT0
PCON
TCON
TMOD
TL0
SMOD0
TF1
GF1
IE1
GF0
IT1
C/T
STOP
IE0
TR1
C/T
TF0
M1
TR0
M0
GATE
GATE
M1
M0
TL1
TH0
TH1
CKCON(1)
SPC_FNC(1)
EXIF(1)
MPAGE(1)
SCON0
SBUF0
IE
-
0
-
0
T2M
0
T1M
0
T0M
MD2
MD1
MD0
WRS
0
0
1
0
0
0
0
IE5
IE4
I2CINT USBINT
SM0_0 SM1_0 SM2_0 REN_0
TB8_0
RB8_0
TI_0
RI_0
EA
1
ES1
PS1
ET2
PT2
ES0
PS0
ET1
PT1
EX1
PX1
ET0
PT0
EX0
PX0
RI_1
IP
SCON1(1)
SBUF1(1)
T2CON
RCAP2L
RCAP2H
TL2
SM0_1 SM1_1 SM2_1 REN_1
TB8_1
RB8_1
TI_1
TF2
EXF2
RCLK
TCLK
EXEN2
TR2
C/T2
CP/RL2
EZ-USB v1.9
Appendix B: 8051 Architectural Overview
B - 13
CYPRESS [ CYPRESS ]
