8-bit CMOS Microcontroller with 2K Bytes Flash
| Pin | Name | Type |
|---|---|---|
| 20 | VCC | power_in |
| 8 | (TO)_P3.4 | bidirectional |
| 9 | (T1)_P3.5 | bidirectional |
| 4 | XTAL2 | output |
| 5 | XTAL1 | input |
| 11 | P3.7 | bidirectional |
| 1 | RST/VPP | bidirectional |
| 10 | GND | power_in |
| 2 | (RXD)_P3.0 | bidirectional |
| 3 | (TXD)_P3.1 | bidirectional |
| 6 | (*INT0)_P3.2 | bidirectional |
| 7 | (*INT1)_P3.3 | bidirectional |
| 16 | P1.4 | bidirectional |
| 17 | P1.5 | bidirectional |
| 18 | P1.6 | bidirectional |
| 19 | P1.7 | bidirectional |
| 12 | P1.0_(AIN0) | bidirectional |
| 13 | P1.1_(AIN1) | bidirectional |
| 14 | P1.2 | bidirectional |
| 15 | P1.3 | bidirectional |
