previously, I have successfully connected an SPI based flash memory to a 5V system using resistors to drop the voltage down from 5v to 3.3 v for the CS, CLK & SI lines and a FET controled by the flash for the
3.3v to 5v, SO connection.I now have to directly connect a flash chip to the address and data lines of a microcontroller. I now have to deal with something like 34 lines instead of 4 and the speed of the signals will probably be a lot faster than the SPI Flash.
Can I still get away with using my simple resistor interface?
I have been looking at some devices called TruLevel Bus Switches from Fairchild which can do the level translation.
EG.
and other devices FSTD16450, FSTUD16450, FSTD3125 and FSTUD32450.
However, I don't seem to be able to find a UK supplier. Google doesn't seem to be much help either.
Any ideas?
Thanks.