- The XP IOL block provides SDR and DDR logic
- IODELAY provides internal delay support of at least 3.6 ns on input (when cascaded)
- IODELAY provides internal delay support of at least 1.8 ns on output
- Unused XPHY I/O within the nibble are available to the XP IOL
- IODELAY must use the input ports to dynamically select the delay tap. DELAY_VALUE is not supported.