USB to Serial Module CP2102 CH9102 Module USB to TTL STC Downloader UARTItem NO.: CP2102 UART STC

USB to Serial Module CP2102 CH9102

Common Sense (Very Important):

● TXD: The sending end, usually represented as its own sending end, must be connected to another device's RXD for normal communication.

● RXD: The receiving end, usually represented as its own receiving end, must be connected to another device's TXD for normal communication.

● During normal communication, the TXD itself is always connected to the RXD of the device!

● Self receiving spontaneity: During normal communication, the RXD is connected to the TXD of other devices. Therefore, if you want to receive the data you send, as the name suggests, it means that you receive the data you send. That is, your own TXD is directly connected to the RXD to test whether your transmission and reception are normal. This is a fast and simple testing method. When problems occur, you should first perform this test to determine whether the product is faulty. Also known as loop back testing.

Level Logic:

● TTL level: Usually, data representation is binary, with+5V equivalent to logic "1" and 0V equivalent to logic "0". It is called a TTL signal system and is a positive logic

● RS232 level: using -12V to -3V, equivalent to logic "0",+3V to+12V logic level, equivalent to logic "1", is negative logic

Product Description:

1. The main chip is CP2102, which generates a virtual serial port after installing the driver

2. USB power on, with outgoing interfaces including 3.3V (<40mA), 5V, GND, TX, RX, signal pin level of 3.3V, positive logic

3. The onboard status indicator light and transceiver indicator light will remain on when the driver is correctly installed. The transceiver indicator light will flash during communication, and the higher the baud rate, the lower the brightness

4. Supports baud rates from 300bps to 1Mbps

5. Communication format support: 1) 5,6,7,8 data bits; 2) Supports stop bits 1, 1.5, and 2; 3) Odd, even, mark, space, none verification

6. Supported operating systems: Windows Vista/xp/server 2003/200, Mac OS-X/OS-9, Linux

7. The USB head is male and can be directly connected to the computer USB port

8. SMT process is used to produce SMT components with stable quality

9. Volume without USB head: (mm)