Tool/software:
I am trying to step up, and stepdown SPI through this LVL shifter. I would like to go from 1.8V to 2.5V, and back down again. I cannot seem to get the step-up functionality to work.
Even on a test setup, where only GND, VREFA, VREFB, and enable are selected, if I put a clock signal at 1.8 in, it STAYS 1.8 on the output. However, IF I switch to the B side with a 2.5 signal, it does get reduced to a 1.8.
The chip mentions auto-bidirectional, is there something that I am missing?
I know there needs to be a .8V increase between the references, I have tried 1.8 to 3.3 and still no luck
