This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/simtrace@lists.osmocom.org/.
Holger Hans Peter Freyther holger at freyther.deOn 08/18/2011 10:24 PM, Kevin Redon wrote: > Hi, > > I think I found a small hardware bug while fixing the v1.0p boards > (adding a 100nF capacitor near the LDO pin 4). > When I want to put the SAM7S in SAM-BA mode (shorting TEST and 3.3V > pins), it does not work, even after waiting a lot of time. > The 2 LEDs are on, and when I touch PA0 (pin 48 on the right upper > corner of the SAM7S, near the "A") with a piece of metal, the LEDs > switch off and putting into SAM-BA mode works. > maybe PA0 needs to be low/up but it is not connected and probably floating. > The solution is easy, but should we correct that for the next version > (if it is a real bug)? Interesting, I asked questions about the default state of PA0,PA1 and PA2 in the 'TST PIN and...'. So the SAM7 datasheet in the git repo says that: PA0-PA... default is: 'Pulled-up input at reset'. Sorry, I am a noob with HW but even with PA0 not connected... it should be pulled up and be a logical one? Did you check if there is a more recent version of the datasheet?