Invert ATTN pin arm mode for Feather RST/EN functionality?

According to the documentation, there are two modes for the ATTN pin:

  • arm mode which can be manually triggered remotely by adding a note to an inbound .qi file. This mode pulls the ATTN pin LOW, and then briefly HIGH when a change to the note file(s) is/are detected.
  • watchdog mode which is sort of the opposite of arm mode. ATTN pin is pulled HIGH, but briefly LOW if no requests are made to the Notecard for x seconds.

Is it possible to implement a watchdog-like mode for the ATTN pin which is manually triggered like with arm mode (without extra hardware)? Basically, I’d like to be able to force reset my device if necessary in the field, and not necessarily rely on the watchdog mode.