Back to browse
AT89x51xxJ
8-bit Microcontroller with 4K Bytes Flash, PLCC-44
Schematic Symbol
Pin Configuration (44 pins)
| Pin | Name | Type |
|---|---|---|
| 4 | P1.2 | bidirectional |
| 1 | NC | no_connect |
| 2 | P1.0 | bidirectional |
| 3 | P1.1 | bidirectional |
| 5 | P1.3 | bidirectional |
| 6 | P1.4 | bidirectional |
| 7 | P1.5 | bidirectional |
| 8 | P1.6 | bidirectional |
| 9 | P1.7/SCK | bidirectional |
| 10 | RST | input |
| 11 | P3.0 | bidirectional |
| 12 | NC | no_connect |
| 13 | P3.1 | bidirectional |
| 14 | P3.2 | bidirectional |
| 15 | P3.3 | bidirectional |
| 16 | P3.4 | bidirectional |
| 17 | P3.5 | bidirectional |
| 18 | P3.6 | bidirectional |
| 19 | P3.7 | bidirectional |
| 20 | XTAL2 | input |
| 21 | XTAL1 | input |
| 22 | GND | power_in |
| 23 | NC | no_connect |
| 24 | P2.0/A8 | bidirectional |
| 25 | P2.1/A9 | bidirectional |
| 26 | P2.2/A10 | bidirectional |
| 27 | P2.3/A11 | bidirectional |
| 28 | P2.4/A12 | bidirectional |
| 29 | P2.5/A13 | bidirectional |
| 30 | P2.6/A14 | bidirectional |
| 31 | P2.7/A15 | bidirectional |
| 32 | ~{PSEN} | output |
| 33 | ALE | output |
| 34 | NC | no_connect |
| 35 | ~{EA}/V_{pp} | input |
| 36 | P0.7/AD7 | bidirectional |
| 37 | P0.6/AD6 | bidirectional |
| 38 | P0.5/AD5 | bidirectional |
| 39 | P0.4/AD4 | bidirectional |
| 40 | P0.3/AD3 | bidirectional |
| 41 | P0.2/AD2 | bidirectional |
| 42 | P0.1/AD1 | bidirectional |
| 43 | P0.0/AD0 | bidirectional |
| 44 | V_{cc} | power_in |
Footprint
ConfirmedPackage_LCC/PLCC-44
Pad Layout
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Pads (44)
| Number | Type |
|---|---|
| 1 | smd |
| 2 | smd |
| 3 | smd |
| 4 | smd |
| 5 | smd |
| 6 | smd |
| 7 | smd |
| 8 | smd |
| 9 | smd |
| 10 | smd |
| 11 | smd |
| 12 | smd |
| 13 | smd |
| 14 | smd |
| 15 | smd |
| 16 | smd |
| 17 | smd |
| 18 | smd |
| 19 | smd |
| 20 | smd |
| 21 | smd |
| 22 | smd |
| 23 | smd |
| 24 | smd |
| 25 | smd |
| 26 | smd |
| 27 | smd |
| 28 | smd |
| 29 | smd |
| 30 | smd |
| 31 | smd |
| 32 | smd |
| 33 | smd |
| 34 | smd |
| 35 | smd |
| 36 | smd |
| 37 | smd |
| 38 | smd |
| 39 | smd |
| 40 | smd |
| 41 | smd |
| 42 | smd |
| 43 | smd |
| 44 | smd |