Actually, since each EPROM is now 4x bigger than necessary, couldn't you do all this with just one chip? The circuit must be decoding a couple of high-order address lines to drive the chip-select pins of the other three EPROMs, so you'd just tie those two address lines to the unused address pins of your new EPROM.
-- john, KE5FX > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Behalf Of Didier Juges > Sent: Thursday, October 19, 2006 5:34 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] HP8568B firware eproms anyone ? > > > Many CMOS chips draw higher supply current with floating inputs, as the > internal buffers may bias themselves in the middle of the range, where > both transistors are turned on. That may lead to increased temperature > and failure over time. In many cases, floating inputs will simply toggle > as a function of whatever signal line is nearby through stray capacitance. > > I also support tying them to something... > > Didier > _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
