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82C55A_PLCC
CHMOS Programmable Peripheral Interface, PLCC-44
Schematic Symbol
Pin Configuration (44 pins)
| Pin | Name | Type |
|---|---|---|
| 1 | NC | no_connect |
| 2 | PA3 | bidirectional |
| 3 | PA2 | bidirectional |
| 4 | PA1 | bidirectional |
| 5 | PA0 | bidirectional |
| 6 | ~{RD} | input |
| 7 | ~{CS} | input |
| 8 | GND | power_in |
| 9 | A1 | input |
| 10 | A0 | input |
| 11 | PC7 | bidirectional |
| 12 | NC | no_connect |
| 13 | PC6 | bidirectional |
| 14 | PC5 | bidirectional |
| 15 | PC4 | bidirectional |
| 16 | PC0 | bidirectional |
| 17 | PC1 | bidirectional |
| 18 | PC2 | bidirectional |
| 19 | PC3 | bidirectional |
| 20 | PB0 | bidirectional |
| 21 | PB1 | bidirectional |
| 22 | PB2 | bidirectional |
| 23 | NC | no_connect |
| 24 | PB3 | bidirectional |
| 25 | PB4 | bidirectional |
| 26 | PB5 | bidirectional |
| 27 | PB6 | bidirectional |
| 28 | PB7 | bidirectional |
| 29 | VCC | power_in |
| 30 | D7 | bidirectional |
| 31 | D6 | bidirectional |
| 32 | D5 | bidirectional |
| 33 | D4 | bidirectional |
| 34 | NC | no_connect |
| 35 | D3 | bidirectional |
| 36 | D2 | bidirectional |
| 37 | D1 | bidirectional |
| 38 | D0 | bidirectional |
| 39 | RESET | input |
| 40 | ~{WR} | input |
| 41 | PA7 | bidirectional |
| 42 | PA6 | bidirectional |
| 43 | PA5 | bidirectional |
| 44 | PA4 | bidirectional |
Footprint
ConfirmedPackage_LCC/PLCC-44
Pad Layout
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10
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12
13
14
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16
17
18
19
20
21
22
23
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25
26
27
28
29
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31
32
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34
35
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41
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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 |