Philips Semiconductors
Preliminary specification
80C51 8-bit microcontroller
8K/256 OTP, 8 channel 10 bit A/D, I2C, PWM,
capture/compare, high I/O, low voltage (2.7V–5.5V), low power
P87C552
PIN CONFIGURATIONS
Plastic Leaded Chip Carrier pin functions
LOGIC SYMBOL
V
V
9
1
61
SS
DD
XTAL1
XTAL2
10
26
60
PLASTIC
LEADED
CHIP CARRIER
EA/V
ALE/PROG
PP
LOW ORDER
ADDRESS AND
DATA BUS
PSEN
AV
AV
AVref+
AVref–
STADC
SS
DD
44
CT0I
27
43
CT1I
CT2I
CT3I
PWM0
PWM1
Pin Function
Pin Function
Pin Function
T2
1
2
P5.0/ADC0
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
P3.0/RxD
P3.1/TxD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P3.6/WR
P3.7/RD
NC
47
PSEN
RT2
SCL
SDA
V
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
ALE/PROG
DD
ADC0-7
3
STADC
EA/V
PP
4
PWM0
P0.7/AD7
P0.6/AD6
P0.5/AD5
P0.4/AD4
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
AVref–
5
PWM1
6
EW
HIGH ORDER
ADDRESS AND
DATA BUS
7
8
9
P4.0/CMSR0
P4.1/CMSR1
P4.2/CMSR2
P4.3/CMSR3
P4.4/CMSR4
P4.5/CMSR5
P4.6/CMT0
P4.7/CMT1
RST
P1.0/CT0I
P1.1/CT1I
P1.2/CT2I
P1.3/CT3I
P1.4/T2
CMSR0-5
10
11
12
13
14
15
16
17
18
19
20
21
22
23
NC
XTAL2
XTAL1
RxD/DATA
TxD/CLOCK
INT0
V
SS
AVref+
V
INT1
T0
T1
WR
RD
SS
CMT0
CMT1
AV
AV
SS
NC
DD
P2.0/A08
P2.1/A09
P2.2/A10
P2.3/A11
P2.4/A12
P2.5/A13
P2.6/A14
P2.7/A15
RST
EW
P5.7/ADC7
P5.6/ADC6
P5.5/ADC5
P5.4/ADC4
P5.3/ADC3
P5.2/ADC2
P5.1/ADC1
SU00210
P1.5/RT2
P1.6/SCL
P1.7/SDA
SU00208
4
1999 Mar 30
NXP [ NXP ]
