Rainbow Electronics AT89C51SND1C - Manual (Page 3)

3
AT8xC51SND1C
4109E–8051–06/03
Pin Description
Pinouts Figure 2. AT89C51SND1C 80-pin QFP Package
Note: 1. ISP pin is only available in AT89C51SND1C product.
Do not connect this pin on AT83C51SND1C product.
AT89C51SND1C-RO (FLASH)
AT83C51SND1C-RO (ROM)
P
0
.3
/A
D3
P
0
.4
/A
D4
P
0
.5
/A
D5
VS
S
VD
D
P
0
.6
/A
D6
P
0
.7
/A
D7
P
2
.0
/A
8
P
2
.1
/A
9
P
3
.1
/T
X
D
P3.
2
/I
N
T
0
P3.
3
/I
N
T
1
P
3
.4/T
0
P
3
.0/R
X
D
1
2
3
4
5
6
7
8
13
11
10
P2.2/A10
P2.3/A11
P2.4/A12
P2.6/A14
P2.5/A13
P2.7/A15
MCLK
MDAT
MCMD
P
0
.2
/A
D2
P
0
.1
/A
D1
P
0
.0
/A
D0
PVSS
VSS
X2
X1
TST
VSS
9
12
14
15
16
P
4
.3
/S
S
P
4
.2
/S
CK
P
4
.1
/M
OS
I
P
4
.0
/M
IS
O
VSS
VDD
RST
SCLK
DSEL
DCLK
DOUT
AI
N
1
AI
N
0
AR
EF
N
AR
E
F
P
A
VSS
AV
D
D
P3
.7
/R
D
P3
.6
/WR
P
3
.5/T
1
VD
D
P1.0/KIN0
P1.1/KIN1
P1.2/KIN2
P1.3/KIN3
P1.4
P1.5
P1.7/SDA
FILT
PVDD
VDD
P1.6/SCL
17
18
19
20
21 22 23 24 25 26 27 28 33 31 30 29 32 34 35 36 37 38 39 40
41
42
43
44
45
46
47
48
53
51
50
49
52
54
55
56
57
58
59
60
61 62 63 64 65 66 67 68 73 71 70 69 72 74 75 76 77 78 79 80
ALE
ISP/NC (1)
UVDD
UVSS
P5.
0
P5.
1
P4.
7
P4.
6
D-
D+
P5.
3
P5.
2
VSS
VDD
P4.5
P4.4