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Special function registers …continued
Table 4.
* indicates SFRs that are bit addressable
Name
FST
Description
SFR
address
Bit functions and addresses
MSB
-
LSB
-
Flash Status Register
Interrupt Enable 0
Interrupt Enable 1
B6
Bit address
A8H
SB
AE
EC
EE
-
-
AD
ET2
ED
-
-
AC
ES0
EC
-
EDC
AB
-
-
AF
EA
EF
-
AA
EX1
EA
A9
ET0
E9
A8
EX0
E8
IEN0*
IEN1*
ET1
EB
Bit address
E8H
EBO
BB
Bit address
B8H
BF
-
BE
PPC
PPCH
FE
-
BD
PT2
PT2H
FD
-
BC
PS
PSH
FC
-
BA
PX1
PX1H
FA
B9
PT0
PT0H
F9
B8
PX0
PX0H
F8
IP0*
Interrupt Priority
PT1
PT1H
FB
IP0H
Interrupt Priority 0 HIGH
B7H
-
Bit address
F8H
FF
-
IP1*
IP1H
FCF
Interrupt Priority 1
PBO
PBOH
-
Interrupt Priority 1 HIGH
F7H
-
-
-
-
B1H
-
-
-
-
-
SWR
81
BSEL
80
Bit address
80H
87
AD7
97
86
85
84
AD4
94
83
82
P0*
P1*
Port 0
Port 1
AD6
96
AD5
95
AD3
93
AD2
92
AD1
91
AD0
90
Bit address
90H
CEX4/
SPICLK
CEX3/
MISO
CEX2/
MOSI
CEX1/
SS
CEX0
ECI
T2EX
T2
Bit address
A0H
A7
A15
B7
A6
A14
B6
A5
A13
B5
A4
A12
B4
A3
A11
B3
A2
A10
B2
A1
A9
A0
A8
P2*
Port 2
Bit address
B0H
B1
B0
RXD
IDL
D0
P
P3*
Port 3
RD
WR
T1
T0
INT1
GF1
D3
INT0
GF0
D2
TXD
PD
D1
PCON
Power Control Register
87H
SMOD1
D7
SMOD0
D6
BOF
D5
POF
D4
Bit address
D0H
PSW*
Program Status Word
Timer2 Capture HIGH
Timer2 Capture LOW
CY
AC
F0
RS1
RS0
OV
F1
RCAP2H
RCAP2L
CBH
CAH
Bit address
98H
9F
9E
9D
9C
9B
9A
99
98
SCON*
SBUF
Serial Port Control
SM0/FE_
SM1
SM2
REN
TB8
RB8
TI
RI
Serial Port Data Buffer Register
99H
NXP [ NXP ]
