RS232 serial port adapter cable module PL2303HX USB transmission to TTL

Line sequence definition red +5V, black GND, white RXD, green TXD

Special Note:
When setting the 3.3V and 5.0V output (this is for the single-chip microcomputer, the upgrade machine is not needed), please unplug the small board from the computer, set the jumper, and do not operate with power to avoid damage to the device.

Pin connection and description:
Please be sure to find the pin definition before connecting, especially GND must not be connected to the pin with voltage, and the RX and TX terminals should not be connected to the VCC pin. (The voltage of some VCC pins is actually measured as high as 14V.) Wrong connection The patch cord chip must be burned. Please be careful not to use your own small board for experimentation, otherwise we will not be responsible for the burnout. Be sure to find a good pin definition before connecting.

Connection method: Only 3 wires are needed for flashing, generally only 3 signal wires RX TX GND are used, and VCC does not need to be connected. The above are friends with 4 and 5 pins, so you don't need to connect the VCC and BT pins. When using, please connect RXD to the target board TX, TXD to the target board RX, and GND to GND. If it doesn't work, swap RX and TX.

All modules are double tested and leave the factory!