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S87C652-4B44 Datasheet(PDF) 6 Page - NXP Semiconductors

Part # S87C652-4B44
Description  80C51 8-bit microcontroller 8K/16K, 256 OTP, I2C
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

S87C652-4B44 Datasheet(HTML) 6 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
87C652/87C654
80C51 8-bit microcontroller
8K/16K, 256 OTP, I2C
1999 Jul 23
6
Table 1.
8XC652/654 Special Function Registers
SYMBOL
DESCRIPTION
DIRECT
ADDRESS
BIT ADDRESS, SYMBOL, OR ALTERNATIVE PORT FUNCTION
MSB
LSB
RESET
VALUE
ACC*
Accumulator
E0H
E7
E6
E5
E4
E3
E2
E1
E0
00H
B*
B register
F0H
F7
F6
F5
F4
F3
F2
F1
F0
00H
DPTR:
DPH
DPL
Data pointer
(2 bytes)
Data pointer high
Data pointer low
83H
82H
00H
00H
AF
AE
AD
AC
AB
AA
A9
A8
IE*#
Interrupt enable
A8H
EA
ES1
ES0
ET1
EX1
ET0
EX0
0x000000B
BF
BE
BD
BC
BB
BA
B9
B8
IP*#
Interrupt priority
B8H
–
PS1
PS0
PT1
PX1
PT0
PX0
xx000000B
87
86
85
84
83
82
81
80
P0*
Port 0
80H
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
FFH
97
96
95
94
93
92
91
90
P1*#
Port 1
90H
SDA
SCL
FFH
A7
A6
A5
A4
A3
A2
A1
A0
P2*
Port 2
A0H
A15
A14
A13
A12
A11
A10
A9
A8
FFH
B7
B6
B5
B4
B3
B2
B1
B0
P3*
Port 3
B0H
RD
WR
T1
T0
INT1
INT0
TXD
RXD
FFH
PCON#
Power control
87H
SMOD
–
–
–
GF1
GF0
PD
IDL
0xxx0000B
9F
9E
9D
9C
9B
9A
99
98
S0CON*#
Serial 0 port control
98H
SM0
SM1
SM2
REN
TB8
RB8
TI
RI
00H
S0BUF#
Serial 0 data buffer
99H
xxxxxxxxB
D7
D6
D5
D4
D3
D2
D1
D0
PSW*
Program status word
D0H
CY
AC
F0
RS1
RS0
OV
F1
P
00H
S1DAT#
Serial 1 data
DAH
00H
SP
Stack pointer
81H
07H
S1ADR#
Serial 1 address
DBH
 SLAVE ADDRESS 
GC
00H
S1STA#
Serial 1 status
D9H
SC4
SC3
SC2
SC1
SC0
0
0
0
F8H
DF
DE
DD
DC
DB
DA
D9
D8
S1CON*#
Serial 1 control
D8H
CR2
ENS1
STA
STO
SI
AA
CR1
CR0
00000000B
8F
8E
8D
8C
8B
8A
89
88
TCON*
Timer control
88H
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
00H
TH1
Timer high 1
8DH
00H
TH0
Timer high 0
8CH
00H
TL1
Timer low 1
8BH
00H
TL0
Timer low 0
8AH
00H
TMOD
Timer mode
89H
GATE
C/T
M1
M0
GATE
C/T
M1
M0
00H
*
SFRs are bit addressable.
#
SFRs are modified from or added to the 80C51 SFRs.


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