I have a USB dongle which converts TTL UART signal from a microcontroller to USB level signal using level converter. I has six pins Vcc, GND, RTS, CTS, TXD, RXD. My microcontroller has two pins for UART which are RX and TX. my microcontroller is Atmega16L and the USB dongle is RN-SRL-PRO3V-DGL from Roving Networks.
I need to know how to connect micro to USB dongle. Is it RXD connected to RX and TXD connected to TX. or is it the other way around (RXD to TX and TXD to RX).
Any help is much appreciated. Thanks