Rainbow Electronics AT89C51SND1C - Manual (Page 5)

5
AT8xC51SND1C
4109E–8051–06/03
Figure 4. AT8xC51SND1C 84-pin PLCC Package
AT89C51SND1C-SR (FLASH)
P0
.3
/A
D
3
P0
.4
/A
D
4
P0
.5
/A
D
5
VS
S
VD
D
P0
.6
/A
D
6
P0
.7
/A
D
7
P2
.0
/A
8
P2
.1
/A
9
P
3
.3/IN
T
1
P
3
.4/T
0
P
3
.5/T
1
P
3
.6/W
R
P
3
.2/IN
T
0
65
64
63
62
61
60
59
58
55
56
57
12
13
14
15
16
17
22
20
19
33 34 35 36 37
4 3 2 1
84 83 82 81 80 79 78
NC
P2.3/A11
P2.4/A12
P2.6/A14
P2.5/A13
P2.7/A15
MCLK
MDAT
MCMD
P0
.2
/A
D
2
P0
.1
/A
D
1
P5
.0
PAVSS
VSS
X2
NC
X1
P3
.1
/TX
D
18
21
23
24
25
38 39 40 41 42
69
68
67
66
70
5 6 7 8 9
P4
.3
/S
S
P4
.2
/S
C
K
P
4
.1
/M
OS
I
P
4
.0
/M
ISO
VSS
VDD
RST
SCLK
DSEL
DCLK
DOUT
AI
N
1
AI
N
0
AR
E
F
N
AR
EF
P
AV
S
S
AV
D
D
VS
S
VD
D
P
3
.7
/RD
P3.
0
/R
XD
P1.0/KIN0
P1.1/KIN1
P1.2/KIN2
P1.3/KIN3
P1.4
P1.5
P1.7/SDA
FILT
PAVDD
VDD
P1.6/SCL
26
43
TST
P5
.2
P0
.0
/A
D
0
77
P2.2/A10
54
ALE
ISP
NC P5
.1
P4
.7
P4
.6
76 75 10 11
28
27
29
30
31
32
UVDD
UVSS
44 45 46 47 48 49 50 51 52 53
74
73
72
71
P4.4
P4.5
VDD
VSS
D- D+ NC
P5
.3