AVR-Chat

--- In AVR-Chat@yahoogroups.com, "Chuck Hackett" <egroupscdh@...> wrote:

> Why can't AVR Studio/JTAG Ice-Cube
> tell that there is no clock ...
> ... I guess the ATMega16 can be
> programmed via JTAG even when
> there is no clock present?

Atmel documents all this.  The JTAG programming interface has its own clock and can, indeed, work when there is no main clock.  Thus, you can rescue devices with mal-programmed clock fuses (one of the reasons that I personally prefer JTAG).  However, this doesn't work for debugging, which does require a main clock.  I would guess that verification is skipped because it would lengthen the code/compile/run cycle.  One could hope for the option, but I don't think its is there.

Graham.