Andy Green wrote: > anything with HOLD we must have MICBIAS powered. Even then maybe we > don't make enough high level to detect a logic '1' at CPU interrupt > input considering the load of the Mic.
Hmm, 3.3V/(2.2+.9)*.9 = 0.96V into a pin with Vil(max) = 0.8V and Vih(min) = 2V looks more like an all-time low :-( The circuit is almost identical to GTA01. I wonder how well we're doing there. I don't remember any major complaints about HOLD, but then, perhaps nobody tried ? - Werner
