Help to setup GPS connection.

[ScaleRobotics]

So far based on what I read I think, voltage divider is not needed because I just want data reading from GPS(LS20031) to MCU or PC.
For GPS to Pic16F877A
GPS Tx--> Mcu Rx
For GPS to PC
GPS Tx--> PC Rx

The LS20031 is TTL, and not RS-232. So you will not be able to send it out directly to the PC. You will need something like a max232, or an equivalent to invert the signal levels.

Your PIC should be able to receive the TTL at 3.3v, even though I am guessing the PIC is at 5v. Just don't TX from the PIC to the GPS without a level shifter.

[mbox]

Sorry its been a while, been busy working with other things.

The LS20031 is TTL, and not RS-232. So you will not be able to send it out directly to the PC. You will need something like a max232, or an equivalent to invert the signal levels.

Your PIC should be able to receive the TTL at 3.3v, even though I am guessing the PIC is at 5v. Just don't TX from the PIC to the GPS without a level shifter.

Thanks for the info...one more question, I don't have 20Mz crystal, but I do have 20.945 Cyrstal, can I use it?

thanks in advance,
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