Ok but now I ran into another problem the teensy runs at 16mhz 16mips so how do I know what converter is fast enough so I do not have to put delays in my code if I want to say pin up and pin down or visa versa without having to put delays in??? I found these
The bidirectional translator I seen on a comment on sparkfun.com 's
page that has a translator but the comments said it had problems and
used a simple voltage divider for the down converter this was
sugjested in the comments. TXB0108 I am looking into how fast it is.
It is described as 8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR WITH
AUTO-DIRECTION SENSING AND ±15-kV ESD PROTECTION.
8 channel and said to be 2$ on the post. so less than 2 of these could
isolate and level translate on all the lines needed if it was fast
here is the link I set the propigation delay on the search to 3ns but
their are some products clasified differently so they may not be in
http://www.mouser.com/Semiconductors/Lo ... ricing%7C0