USB TTL Serial Cable Series
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USB To RS232 TTL UART PL2303HX Converter USB to COM Module Serial Cable Adapter

USB To RS232 TTL UART PL2303HX Auto Converter USB to COM Cable Adapter Module
Brand new and high quality
Supports baud rate from 75 to 128000
Support Linux, Mac OS, WinCE and Windows (XP, Vista Win 7 inc 64 Bit Edition)
PL2303HX USB to Serial Controll
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Description

PL2303 PL2303HX USB to UART TTL Cable Module 4p 4 pin RS232 Converter

 
USB To RS232 TTL UART PL2303HX Auto Converter USB to COM Cable Adapter Module
Brand new and high quality
Supports baud rate from 75 to 128000
Support Linux, Mac OS, WinCE and Windows (XP, Vista Win 7 inc 64 Bit Edition)
PL2303HX USB to Serial Controller adopted
4 connecting wires, 2.54mm pitch type
 
Wire sequence is defined
Red Wire == VCC, (+5V)
Black Wire ==GND
Green Wire == TXD
White Wire == RXD
Length: Approx 1M
 
Connection method: Brush requires only three lines, generally used only three signal lines RX TX GND, VCC.
 
Note: After setting 3.3V and 5.0V output (this is to the microcontroller power supply, no need to upgrade the machine)
please put the small plate unplug from the computer, set the jumper to take, do not charged to avoid damage to the device.
 
Pin connection and description:

Connector pin assignments before you must find, especially GND must not be connected to the voltage pin, andRX and TX side do not connected to the VCC pin, the (actual measurement had some VCC pin voltage up to 14V.) Wrong shall be burnt chip adapter cable, be sure to note, do not take their own small board to do the experiment,
 
Connection:
RX for TX;
TX to RX;
Ground-ground (GND to GND)
USB to serial platelet function:
   1 simple serial communication.
   2 or ADSL router firmware upgrade.
   3 GPS serial communication.
   4 hard drive firmware upgrade.
   5 easy to use, RX received the MCU TX; TX RX received at the MCU connected to ground. Without the need for conversion MAX232.
   6 Super Terminal in use; common serial debugging tools.
   7 upgrade with a variety of satellite machine.
     ............... And other general-purpose USB-to-serial small board