[sdiy] Z80 reset time

[MTG]

Do the powers supplies come up quickly by comparison?  i can see the 
point of a long wait time, but the data sheets should specify a rise 
time for the reset pin.


On 11/18/2012 12:20 PM, Terje Winther wrote:
> Looking at the Z80 CPU brain of a polysynth (they are in lots of old 
> polysynths...) all have a ever so slightly delayed positive reset 
> trigger.
> On one OB-SX the reset comes fairly late after I turn the synth on, 
> maybe like 2 seconds later. It is a very slowly rising voltage. That 
> does seems quite slow.
> Will the reset really work with that slow rising voltage, or does it 
> need a sharper rising edge to reset?
>
>
> Terje Winther
> terje.winther at wintherstormer.no
> http://www.wintherstormer.no/
>
>
>
>
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