p89c538nbbb NXP Semiconductors, p89c538nbbb Datasheet - Page 6

• Manufacturer Part Number: p89c538nbbb
• Description: Cmos Single-chip 8-bit Microcontrollers With Flash Program Memory
• Manufacturer: NXP Semiconductors

*
# SFRs are modified from or added to the 80C51 SFRs.
– Reserved bits.
Philips Semiconductors
Table 1. Special Function Registers
1997 Jun 05
ACC*
B*
DPTR:
IE*
IP*
P0*
P1*
P2*
P3*
PCON#
PSW*
RACAP2H#
RACAP2L#
SBUF
SCON*
SP
TCON*
T2CON*
TH0
TH1
TH2#
TL0
TL1
TL2#
TMOD
SYMBOL
DPL
CMOS single-chip 8-bit microcontrollers
with FLASH program memory
DPH
SFRs are bit addressable.
Accumulator
B register
Data Pointer (2 bytes)
Data Pointer High
Data Pointer Low
Interrupt Enable
Interrupt Priority
Port 0
Port 1
Port 2
Port 3
Power Control
Program Status Word
Timer 2 Capture High
Timer 2 Capture Low
Serial Data Buffer
Serial Control
Stack Pointer
Timer Control
Timer 2 Control
Timer High 0
Timer High 1
Timer High 2
Timer Low 0
Timer Low 1
Timer Low 2
Timer Mode
DESCRIPTION
ADDRESS
DIRECT
CBH
CAH
CDH
CCH
E0H
A8H
B8H
A0H
B0H
D0H
C8H
8CH
8DH
8AH
8BH
F0H
83H
82H
80H
90H
87H
99H
98H
81H
88H
89H
MSB
SMOD
GATE
AD15
SM0
AD7
TF1
TF2
RD
CY
E7
AF
EA
BF
A7
B7
D7
CF
F7
87
97
9F
8F
–
–
BIT ADDRESS, SYMBOL, OR ALTERNATIVE PORT FUNCTION
AD14
EXF2
AD6
SM1
TR1
WR
C/T
AE
BE
D6
AC
CE
E6
F6
86
96
A6
B6
9E
8E
–
–
–
–
6
RCLK
AD13
AD5
SM2
ET2
PT2
TF0
AD
BD
CD
M1
E5
F5
A5
B5
T1
D5
F0
9D
8D
85
95
–
–
AD12
TCLK
REN
AD4
RS1
TR0
AC
ES
BC
PS
CC
M0
E4
F4
A4
B4
T0
D4
9C
8C
84
94
–
–
EXEN2
GATE
AD11
INT1
AD3
GF1
RS0
ET1
PT1
TB8
IE1
AB
BB
CB
E3
F3
A3
B3
D3
9B
8B
83
93
–
89C535/89C536/89C538
AD10
INT0
AD2
GF0
RB8
EX1
PX1
TR2
C/T
OV
IT1
AA
BA
D2
CA
E2
F2
A2
B2
9A
8A
82
92
–
T2EX
C/T2
AD1
AD9
ET0
PT0
TxD
IE0
PD
M1
E1
F1
A9
B9
A1
B1
D1
C9
81
91
99
89
TI
–
Preliminary specification
CP/RL2
LSB
EX0
PX0
AD0
AD8
RxD
IDL
IT0
M0
E0
A8
B8
A0
B0
D0
C8
F0
80
90
T2
98
88
RI
P
00H
00H
00H
00H
00H
x0000000B
FFH
FFH
FFH
FFH
0xxxx000B
00H
00H
00H
xxxxxxxxB
00H
07H
00H
00H
00H
00H
00H
00H
00H
00H
00H
RESET
VALUE