My First Schematic for the SX28

SXlee

I'm learning.

I'm not so good at this, and would like to know if I've got it.

=>is the jumper for debugging OK?, or maybe it should be on the OSC1 line?, or both?
=>is the reset OK?
=>is the Power supply OK?

SXlee

Zoot

This looks fine. The jump should be OK, but it is better to have a socket for the resonator so you can pull it for debugging. Test it and see -- if it's a crystal resonator you won't damage it (or your Key) if debugging doesn't work. TTL clocks would damage both the clock and the Key.

SXlee

Thanks Zoot.
Can the RTCC be tide to (Vdd or Vss)?.

RobotWorkshop

SXlee wrote: »

Thanks Zoot.
Can the RTCC be tide to (Vdd or Vss)?.

I usually tie the RTCC pin low. You can see this on the schematic for my SX48 carrier PCB:

http://www.robotworkshop.com/robotworkshop/projects/parallax/SX48OEMSchematic.pdf

I still have some of these boards available if you want to experiment with the SX48 chip. You can read about that board here:

http://forums.parallax.com/showthread.php?94916-SX48-40-pin-DIP-full-kit-and-PCB-available.&highlight=bs2p40

Robert