Using a jumper wire between the reset pin and ground , on an arduino uno allowing me to use the arduino as a USB xbee explorer with the xbee on the shield and making sure the jumpers on the shield are set to USB.
X CTU doesnt recongize the board when i plug the usb in.
Can Someone point me in the right direction please thanks.
Check the schematic for your XBee shield. You may find that the Reset line of the Arduino is also used to reset the XBee.
Instead of using Reset you can get the Arduino processor out of the way with this sketch:
void setup()
{
pinmode(0, INPUT);
pinmode(1, INPUT);
}
void loop()
{
}
If it turns out I can go switchmode for a minimal impact on BOM cost (and it fits!) I'll do it.
I did a similar design with a land pattern that could accommodate either a SOT223 or a TSR-1 switching reg.
The idea was to allow loading of one or the other according to requirements. The TSR series from Traco can handle 1A with no heatsinking. I gather that DPAK is the main regulator, the pinouts may be compatible or this would allows the use of a SOT223. Either that or just use the TSR.
two connections on the TOSC pins in the chip.
I did this as well, however I had solder bridges to isolate those two IO pins ("after" the XTAL) because I figured with shields attached there would be a high capacitance on the traces due to the long runs/headers/etc.
What external memory bus? Care to elaborate?
The 2560 is capable of using external memory chips, you could add say 1Mb of data memory (in 64k pages). This can still be done on a shield though. In my design I added a RAM chip and a few page-select signals plus battery backup. But I didn't lose space to Ethernet so had the real estate.
Rob