My understanding of standard SDIO operation is that default mode uses 3.3V signalling and then switches to 1.8V for faster modes such as the high-speed mode supported by the WL1837MOD. In my application the host I/O is 1.8V so I plan to connect the host directly to the WL1837MOD with no translation and no changes in signalling levels. The TI documentation recommends against using translation so I believe this will be fine but I just want to make sure I am not overlooking something.
Thanks - Jason
