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.
TABLE 5: SPECIAL FUNCTION REGISTERS (SFR)
SFR
Register
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
Reset
Value
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
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
P0
SP
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
DPL
DPH
RCON
reserved
PCON
TCON
TMOD
TL0
RAMS1
RAMS0
-
-
SMOD
TF1
GATE1
GF1
IE1
GATE0
GF0
IT1
C/T0
-
-
-
-
-
PDOWN
IE0
M1.0
-
IDLE
IT0
M0.0
-
-
-
-
-
RI
-
-
-
EX0
-
TR1
C/T1
-
-
-
-
-
SM1
-
SCLE
-
-
-
-
-
TF0
M1.1
-
-
-
-
-
SM2
-
-
-
ET2
-
-
-
TR0
M0.1
-
-
-
-
-
REN
-
-
-
ES
-
-
-
-
-
-
-
-
-
-
-
TL1
-
-
-
-
TI
-
-
-
TH0
TH1
P1
-
-
SCON
SBUF
I2CPWME
P2
SM0
-
SDAE
-
EA
-
-
-
TB8
-
PWM1E
RB8
-
PWM1E
-
-
IEN1
ET1
-
-
-
EX1
-
-
ET0
EI2C
I2CIF
-
NP0.1
NP1.1
PT0
PI2C
XRAME
I2CMASTER
IE1
IF1
P3
-
-
PWMD0
PWMD1
IP
PWMD0.4
PWMD1.4
PWMD0.3
PWMD1.3
PWMD0.2
PWMD1.2
PWMD0.1
PWMD1.1
PS
-
PDWAKEUP
I2CNOACKIF
PWMD0.0
PWMD1.0
NP0.2
NP1.2
PX1
-
IAPE
I2CRXACK
NP0.0
NP1.0
PX0
-
-
-
-
-
-
PT2
-
-
PT1
-
-
IP1
-
SYSCON
I2CSTATUS
I2CADDR
I2CCTRL1
I2CCTRL2
I2CTX
I2CRX
T2CON
T2MOD
RCAP2L
RCAP2H
TL2
TH2
PSW
PWMCTRL0
PWMCTRL1
P4
ALEI
I2CTXACK
I2CTXFAIL
I2CRXIF
I2CADDR7
I2CTXIF
I2CADDR6
I2CADDR5
I2CADDR4
I2CADDR3
I2CADDR2
I2CADDR1
MSBCOMP
I2CCK0
I2CEN
MATCH
-
-
-
-
-
-
-
-
-
I2CBUSY
RESTART
I2CCK2
I2CCK1
MASTERRW
SLAVERW
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TF2
EXF2
RCLK
TCLK
EXEN2
TR2
C/T2
T2OE
-
-
-
CP/RL2
CDOWN
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
CY
AC
F0
RS1
RS0
OV
5BITE
5BITE
P4.2
-
-
PWMCK1
PWMCK1
P4.1
-
P
PWMCK0
PWMCK0
P4.0
-
-
-
-
-
-
-
-
-
-
-
-
-
P4.3
-
-
FA11
FA3
FD3
ACC
0000 0000b
0000 0000b
0000 0000b
0000 0000b
0000 0000b
B
-
-
-
IAPFADHI
IAPFADLO
IAPFDATA
IAPFCTRL
FA15
FA7
FD7
FA14
FA6
FD6
FA13
FA5
FD5
FA12
FA4
FD4
FA10
FA2
FD2
FA9
FA1
FD1
IAPFCT1
FA8
FA0
FD0
IAPFCT0
IAPSTART
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