has a datasheet ? ps.: the
has a datasheet ?
ps.: the link doesn’t work…
Oops 
The link - https://www.robotshop.com/letsmakerobots/node/33342 . and i came to know that the dtr pin is just for ‘reseting’ the chip when the downloading starts. Since i am going to make my own arduino board using an atmega328 with arduino bootloader, I can add a reset button on the main board and can press it manually while downloading the program 