You want a logic analyzer. Bob Ammerman RAm Systems ----- Original Message ----- From: "Przemyslaw Lopaciuk" To: "Microcontroller discussion list - Public." Sent: Tuesday, May 09, 2006 1:00 PM Subject: RE: [EE] Circuit isolators... > The situation looks like that... > I've got a board with Intel N80C188. It runs at 24MHz. > It stores information in NVRAM Dallas DS1225AD-150. So it is CMOS. > I want to listen to what it is storing in that RAM. > Boards are connected with ribbon cable. ( BTW do you think that it is a > good idea to use ribbon cable for that kind of purpose? ) > I can only tell that listening to what is going on on that bus is a > tricky business. If somebody has some experience with something similar > I would be very grateful for some knowledge sharing. > > Best regards, > Sam > > > > -----Original Message----- > From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf > Of Vasile Surducan > Sent: 09 May 2006 17:24 > To: Microcontroller discussion list - Public. > Subject: Re: [EE] Circuit isolators... > > On 5/9/06, Przemyslaw Lopaciuk wrote: >> Speed wouldn't be more than 10MHz. >> Signals are a bus. It is a bus driven by Intel N80C188. > > > You're not very generous with explanations. Which is the lenght, which > is the technology for bus hardware implementation (cable, dual layer, > more layers?), does the bus contains sampling clocks ? There are some > fast timing requirements on that 10Mhz bus ? Could be LVDS, LVTTL, TTL > or CMOS ? > I'm too lazy to search for the N80C188, but number looks something old > or obsolete... > > greetings, > Vasile > >> >> Regards, >> Sam >> >> -----Original Message----- >> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On > Behalf >> Of David VanHorn >> Sent: 08 May 2006 21:23 >> To: Microcontroller discussion list - Public. >> Subject: Re: [EE] Circuit isolators... >> >> On 5/8/06, Przemyslaw Lopaciuk wrote: >> > >> > Hi, >> > >> > I need to fully isolate two boards which are connected with 34 PIN >> > cable. ( one board is mine so I can redesign it ). >> > >> > I found some optocouplers but they have only 4 channels so it would >> mean >> > putting 8 ICs on board which doesn't seem to be a very good idea. >> > >> > Does anybody know any other possible way of isolating these boards? >> >> >> You'll need to say a lot more about what's on those 34 pins. >> Voltage, current, impedance, frequency, risetime/falltime... >> >> Otherwise, just unplugging the cable ought to isolate them quite > nicely. >> :) >> >> -- >> > Feel the power of the dark side! Atmel AVR >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist