I find the answer
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Spartan-IIE Family Compared to Spartan-II
Family
• Higher density and more I/O
• Higher performance
• Unique pinouts in cost-effective packages
• Differential signaling
- LVDS, Bus LVDS, LVPECL
• VCCINT = 1.8V
- Lower power
- 5V tolerance with external resistor
- 3V tolerance directly
• PCI, LVTTL, and LVCMOS2 input buffers powered by
VCCO instead of VCCINT
• Unique larger bitstream
BLOCK RAM BLOCK RAM