The PL2303HXD USB to TTL module is based on the PL2303HXD chip. It has its own crystal oscillator and 5V to 3.3V voltage regulator. The maximum baud rate can reach 12Mbps. It has over-current protection and leads to the corresponding communication interface and power interface. The communication interface has instructions. The light indicates the working status, the communication is stable, and the size is small.
| symbol | describe |
| TxD | Serial data output port |
| RXD | Serial data input port |
| GND | Ground pin |
| 3V3 | 3.3V power output pin (load not recommended) |
| 5V | 5V power output pin (up to 500mA) |
| P3 | Exported functional interface |
| P4 | Exported functional interface |
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