I'm using the KE18F512, and I have the FlexCAN working in FIFO mode. MCR[IDAM] = 0, CTRL2[RFFN] = 0, MCR[IRMQ]=1, CTRL2[EACEN] = 1, CTRL2[MRP] = 0. The message buffers from 8-15 are being used for transmission only. I am trying to filter standard frames, so I have the 8 FIFO filters set for 0x40000000, which should require the IDE bit. However, both standard and extended frames are being received. What am I doing wrong?