VRS51L1050
Special Function Registers (SFR)
Addresses 80h to FFh of the SFR address space can be accessed in direct addressing mode only. The following table
lists the VRS51L1050 special function registers.
T
ABLE
5: S
PECIAL
F
UNCTION
R
EGISTERS
(SFR)
SFR
Register
P0
SP
DPL
DPH
RCON
reserved
PCON
TCON
TMOD
TL0
TL1
TH0
TH1
P1
SCON
SBUF
I2CPWME
P2
IEN1
IE1
IF1
P3
PWMD0
PWMD1
IP
IP1
SYSCON
I2CSTATUS
I2CADDR
I2CCTRL1
I2CCTRL2
I2CTX
I2CRX
T2CON
T2MOD
RCAP2L
RCAP2H
TL2
TH2
PSW
PWMCTRL0
PWMCTRL1
P4
ACC
B
IAPFADHI
IAPFADLO
IAPFDATA
IAPFCTRL
SFR
Adrs
80h
81h
82h
83h
85h
86h
87h
88h
89h
8Ah
8Bh
8Ch
8Dh
90h
98h
99h
9Bh
A0h
A8h
A9h
AAh
B0h
B3h
B4h
B8h
B9h
BFh
C0h
C1h
C2h
C3h
C4h
C5h
C8h
C9h
CAh
CBh
CCh
CDh
D0h
D3h
D4h
D8h
E0h
F0h
F4h
F5h
F6h
F7h
Bit 7
-
-
-
-
-
-
SMOD
TF1
GATE1
-
-
-
-
-
SM0
-
SDAE
-
EA
-
-
-
PWMD0.4
PWMD1.4
-
-
-
I2CRXIF
I2CADDR7
Bit 6
-
-
-
-
-
-
-
TR1
C/T1
-
-
-
-
-
SM1
-
SCLE
-
-
-
-
-
PWMD0.3
PWMD1.3
-
-
-
I2CTXIF
I2CADDR6
Bit 5
-
-
-
-
-
-
-
TF0
M1.1
-
-
-
-
-
SM2
-
-
-
ET2
-
-
-
PWMD0.2
PWMD1.2
PT2
-
-
I2CTXFAIL
Bit 4
-
-
-
-
-
-
-
TR0
M0.1
-
-
-
-
-
REN
-
-
-
ES
-
-
-
PWMD0.1
PWMD1.1
PS
-
PDWAKEUP
I2CNOACKIF
Bit 3
-
-
-
-
-
-
GF1
IE1
GATE0
-
-
-
-
-
TB8
-
PWM1E
-
ET1
-
-
-
PWMD0.0
PWMD1.0
PT1
-
-
I2CADDR3
Bit 2
-
-
-
-
-
-
GF0
IT1
C/T0
-
-
-
-
-
RB8
-
PWM1E
-
EX1
-
-
-
NP0.2
NP1.2
PX1
-
IAPE
I2CRXACK
Bit 1
-
-
-
-
RAMS1
-
PDOWN
IE0
M1.0
-
-
-
-
-
TI
-
-
-
ET0
EI2C
I2CIF
-
NP0.1
NP1.1
PT0
PI2C
XRAME
I2CMASTER
Bit 0
-
-
-
-
RAMS0
-
IDLE
IT0
M0.0
-
-
-
-
-
RI
-
-
-
EX0
-
-
NP0.0
NP1.0
PX0
-
ALEI
I2CTXACK
Reset
Value
1111 1111b
0000 0111b
0000 0000b
0000 0000b
0000 0000b
0000 0001b
0000 0000b
0000 0010b
0000 0000b
0000 0000b
0000 0000b
0000 0000b
0000 0000b
1111 1111b
0000 0000b
0111 1111b
0000 0000b
1111 1111b
0000 0000b
0000 0000b
0000 0000b
1111 1011b
0000 0000b
0000 0000b
0000 0000b
0000 0000b
0000 1010b
0000 0000b
1010 0000h
0000 0001b
0000 0000h
0000 0000h
0000 0000h
0000 0000b
Xxxx xx00h
0000 0000b
0000 0000b
0000 0000b
0000 0000b
0000 0001b
0000 0000b
0000 0000b
****1111b
0000 0000b
0000 0000b
0000 0000b
0000 0000b
0000 0000b
I2CADDR5
I2CADDR4
I2CADDR2
I2CADDR1
MSBCOMP
I2CEN
MATCH
-
-
TF2
-
-
-
-
CY
-
SLAVERW
-
-
EXF2
-
-
-
-
AC
-
-
-
-
RCLK
-
-
-
-
F0
-
-
-
-
TCLK
-
-
-
-
RS1
I2CBUSY
RESTART
-
-
EXEN2
-
-
-
-
RS0
I2CCK2
-
-
-
TR2
-
-
-
-
OV
5BITE
5BITE
P4.2
-
-
FA10
FA2
FD2
I2CCK1
-
-
-
C/T2
T2OE
-
-
-
-
PWMCK1
PWMCK1
I2CCK0
MASTERRW
-
-
CP/RL2
CDOWN
-
-
-
P
PWMCK0
PWMCK0
-
-
-
FA15
FA7
FD7
IAPSTART
-
-
-
FA14
FA6
FD6
-
-
-
FA13
FA5
FD5
-
-
-
FA12
FA4
FD4
P4.3
-
-
FA11
FA3
FD3
P4.1
-
-
FA9
FA1
FD1
IAPFCT
1
P4.0
-
-
FA8
FA0
FD0
IAPFCT
0
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