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20-pin 8051 MCU, 2KB flash
| Part number | AT89C2051 |
|---|---|
| Category | Microcontrollers & Processors › 8051 & 8-bit |
| Package | DIP-20 |
| Pins | 20 |
AT89C2051 pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | RST/VPP | input | |
| 2 | P3.0 | bidirectional | |
| 3 | P3.1 | bidirectional | |
| 4 | XTAL2 | output | |
| 5 | XTAL1 | input | |
| 6 | P3.2 | bidirectional | |
| 7 | P3.3 | bidirectional | |
| 8 | P3.4 | bidirectional | |
| 9 | P3.5 | bidirectional | |
| 10 | GND | ground | |
| 11 | P3.7 | bidirectional | |
| 12 | P1.0 | bidirectional | |
| 13 | P1.1 | bidirectional | |
| 14 | P1.2 | bidirectional | |
| 15 | P1.3 | bidirectional | |
| 16 | P1.4 | bidirectional | |
| 17 | P1.5 | bidirectional | |
| 18 | P1.6 | bidirectional | |
| 19 | P1.7 | bidirectional | |
| 20 | VCC | power |
Schematic symbol and footprint
Schematic symbol
Footprint: DIP-20_W7.62mm — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.