Hi
The corrections have been applied. I hope I did not forget anything.
The main changes :
- reset is a jumper
- bootloader switch added
- 100k resistors used (instead of 4.7k, I hope it does not break anything)
- jack connector added (for the debug)
- WP from flash connected
- USB voltage regulator TPS73633 used (lower capacitance)
- USB buffer used instead of the openPCB solution (thus no pull-up and
reset connection). saves space and complexity
- pin renamed
- QS3244 instead of QS3245 used, I/O and other pins are controlled
separately
- ...
To make the changes I used the AT91SAM7X-EK Evaluation Board User Guide.
The overall capacitance is reduced, but I think the 22uF for the battery
should be kept.
files : https://gsm.tsaitgaist.info/SIMtrace/v0.7/
good luck,
Kevin
Hi,
I never tried WSON, but I think it's still possible to solder it.
To do it (as most of the smd), I use a heating plate and a hot air gun
(with soldering paste), and not a soldering iron. So it might also work
with this package.
But the SOIC package is easier for others. Even it's it two time the
price, it's not too expensive.
So you can choose any.
Kevin
On 06.05.2011 11:34, Harald Welte wrote:
> Hi!
>
> I think one of the big concerns is to use components that can still be
> soldered manually (like SOIC-8). All the larger-than-32MBit (4MByte)
> SPI flashes that I could find were in smaller cases with no leads
> extending from the case (like WSON).
>
> This one looks fine to me, and is available from digikey:
> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=SST25VF032…
> datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/S71327_04.pdf
>
> Regards,
> Harald
>
