Juan,
This has been documented in the Firmware Overview (Chapter 4) in the section entitled "Hardware Watchdog Recovery System" since before any developers had their hands on the Widgets. I understand the behavior well and the UHU and CDNC software were built with the heartbeat facility so that all developers would (when using the heartbeat function) not have to put up with the watchdog resets every three seconds. If you use the widgets with the heartbeat on (as it will be on the spacecraft) then no resets occur at all.
Since this section is pretty much missed (or I left the implications unclear) I've added additional treatment of this material to the next revision of the User's Guide which will be available for all to review and comment within a week or two. I just completed the first draft review with Bdale and am doing the final pass of edits before I post for all to critique.
Thanks for the reminder tho'. I'm continually impressed with your work and am enjoying be on this team with you.
Regards, Stephen --