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SP601 Hardware User Guide www.xilinx.com 17
UG518 (v1.1) August 19, 2009
Detailed Description
Figure 1-4 provides the UCF constraints for the DDR2 SDRAM data pins, including the
I/O pin assignment and I/O standard used.
Figure 1-5 provides the UCF constraints for the DDR2 SDRAM control pins, including the
I/O pin assignment and the I/O standard used.
References
See the Elpida DDR2 specifications for more information at
http://www.elpida.com/en/products/details/EDE1116ACBG.html
.
Also, see the Spartan-6 FPGA embedded hard memory controller block user guide at
http://www.xilinx.com/support/documentation/user_guides/ug388.pdf
.
X-Ref Target - Figure 1-4
NET "DDR2_DQ15" LOC ="U1";| IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ14" LOC ="U2";| IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ13" LOC ="T1";| IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ12" LOC ="T2";| IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ11" LOC ="N1";| IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ10" LOC ="N2";| IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ9" LOC ="M1"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ8" LOC ="M3"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ7" LOC ="J1"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ6" LOC ="J3"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ5" LOC ="H1"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ4" LOC ="H2"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ3" LOC ="K1"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ2" LOC ="K2"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ1" LOC ="L1"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_DQ0" LOC ="L2"; | IOSTANDARD = SSTL18_II ;
Figure 1-4: UCF Location Constraints for DDR2 SDRAM Data I/O Pins
X-Ref Target - Figure 1-5
NET "DDR2_WE_B" LOC ="E3"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_UDQS_P" LOC ="P2";| IOSTANDARD = SSTL18_II ;
NET "DDR2_UDQS_N" LOC ="P1";| IOSTANDARD = SSTL18_II ;
NET "DDR2_UDM" LOC ="K4"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_RAS_B" LOC ="L5"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_ODT" LOC ="K6"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_LDQS_P" LOC ="L4";| IOSTANDARD = SSTL18_II ;
NET "DDR2_LDQS_N" LOC ="L3";| IOSTANDARD = SSTL18_II ;
NET "DDR2_LDM" LOC ="K3"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_CLK_P" LOC ="G3"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_CLK_N" LOC ="G1"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_CKE" LOC ="H7"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_CAS_B" LOC ="K5"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_BA2" LOC ="E1"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_BA1" LOC ="F1"; | IOSTANDARD = SSTL18_II ;
NET "DDR2_BA0" LOC ="F2"; | IOSTANDARD = SSTL18_II ;
Figure 1-5: UCF Location Constraints for DDR2 SDRAM Control Pins