From the schematics for the AT91SAM7S-EK development kit 3.3V is to connect to VDDANA, VDDFLASH, VDDIO, and VDDIN by closing the jumpers. (JP28/JP13, JP14, JP22) These jumpers are *open*but everything seems to work correctly when I program with via JTAG/ICE. (LED"s blink and all that.)

This seems then for my design I could just put no connections at these pins but that doesn't make sense beause it has to get power somewhere!

Thanks for the info.

-Henk

Hi Henk,

if you take a close look at the board, for example for JP13/JP14, actually these jumpers are not mounted, but the 2 PCB pads for those jumpers are tied together. This is the same for all jumpers you mention. In fact if you cut the PCB track between the pads, those jumpers allow you to connect an anmeter to make current consumption on VDDIN, VDDFLASH and so on.

Cheers,

pfilippi,

Thanks for the information! I obviously made the the assumption that if the jumper wasn't there then the connection was open for sure. What threw me off was the JTAGSEL jumper. The pads here don't havea jump and it is open unlike the rest! Why would Atmel take time to put the pcb pads down, design the schematics with jumpers but not even use them? Cost issue?

Thanks again for all your great posts!

-Henk