Nowadays all serious programmable devices has some different voltages pairs as: core 0.9V -peripheral 1.8V or core 1.8V - peripheral 2.5V or core 2.5V-peripheral 3.3V
If you see the Microchip AFE which has the microcontroller supplied at 3.3V and the AFE section at 5V, you realize the truth, it's at least 10 year back compared with the market. http://ww1.microchip.com/downloads/en/DeviceDoc/39979A.pdf <http://ww1.microchip.com/downloads/en/DeviceDoc/39979A.pdf>So Matt, there isn't a "preffered way" there is just a way which is different in different applications. The simplest, the best. Vasile On Wed, Nov 24, 2010 at 6:42 AM, mattschinkel <[email protected]>wrote: > Good documents, but I agree that there should be one page in the > tutorial book appendix. What is everyone's preferred way to interface > 5v to 3v? > > My favorite is to use an IC such as 74HC08 (must be HC). Single > direction only. For SPI, this allows for a higher number of devices. > > I'm not sure what dual direction solutions there are. > > Matt. > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<jallib%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/jallib?hl=en. > > -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
