[hpsdr] [OZY] Initial OZY Schematic Posted For Review and Comments - May 10, 2006

Lyle Johnson kk7p at wavecable.com
Wed May 10 16:13:20 PDT 2006


Hello Phil!

> I will go with the SN75C1406 and the MPC130 @ 2.7V (has internal 5 k
> pullup - is that ok?).

Should be fine.

> Will determine what to do about a RS-232
> connector when I get further on the pcb layout...  Any suggestions on
> what ATLAS bus line to use for RESET?

X17C1 (pin A19) may be a reasonable choice.  Call it "nRST" and note 
that it is open collector and is pulled to +3V3.  This allows other 
units to either get reset by Ozy, or to stretch the reset to Ozy until 
their local power supply/reset system is stable.

73,

Lyle KK7P


 1147302800.0


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