I am using the K66 (MK66FN2M0VMD18) and I am looking at adding some external SDRAM just in case we need more RAM area. Does the SDRAM controller support only SDRAM @ 3.3V or can it also support lpSDRAM (Micron’s Mobile low power SDRAM) @ 1.8V? For example this Micron P/N MT48H16M32LFB5-75 IT.
The K66 data sheet and reference seems to indicate only SDRAM and does not mention lpSDRAM support. In our case we are running the K66 only at 1.8V and if the K66 only supports SDRAM @ 3.3V, are we precluded from using any external SDRAM? (and we can’t add a bunch of level shifter buffers to support the 3.3V SDRAM).