Hello. I intend to buy a GPS device that interfaces through an RS232 port and that contains two full duplex serial ports that operate at CMOS (3.3V) voltage levels. I need to interface this GPS module with a 16F877 through the UART module but I have no idea about whether the signal levels of the UART module of the PIC are 5V or 3.3V or whether I can interface it in the first place. Will I need a voltage level conversion chip like a MAX?
Please help as soon as you can as time is critical.
Thanks a lot.
Nichola
Please help as soon as you can as time is critical.
Thanks a lot.
Nichola