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Virtex-5 FPGA ML561 User Guide www.xilinx.com 23
UG199 (v1.2) April 19, 2008
Memory Details
R
DDR2 SDRAM DIMM
The FPGA #2 device on the Virtex-5 FPGA ML561 Development Board is connected to
DDR2 memories. The DDR2 memory interface includes a 144-bit wide DIMM connection
to up to five 240-pin DDR2 DIMM sockets.
For the 144-bit wide DIMM datapath, the data bytes are spread across multiple banks of
the FPGA #2 device. Figure 3-4 summarizes the distribution of DDR2 DIMM interface
signals among the different banks of the FPGA #2 device.
Figure 3-4: FPGA #2 Banks for DDR2 DIMM (SSTL18) Interfaces (Top View)
BANK 20 (40)
DDR2 DIMM
DQ 8, 9, 10
BANK 12 (40)
DDR2 DIMM
DQ 11, 12, CB8_15
BANK 11 (40)
DDR2 DIMM
DQ 6, 3 CB0_7
BANK 112
BANK 114
BANK 13 (40)
DDR2 DIMM
DQ 5, 7, 4
BANK 15 (40)
DDR2 DIMM
DQ 0, 1, 2
BANK 116
GTP CLK
BANK 19 (40)
DDR2 DIMM
Controls & DIMM1 Cntl
BANK 120
RX 0, 1
(Configuration)
BANK 0
BANK 3 (20)
General I/O
BANK 5 (20) BANK 23 (40)BANK 124
TX 0, 1
BANK 1 (20)
General I/O
BANK 18 (40)
DDR2 DIMM
DQ 14, 15, 13
BANK 17 (40)
DDR2 DIMM
Common Controls
BANK 118
BANK 22 (40)
DDR2 DIMM
DIMM 4 & 5 Cntl
BANK 122 BANK 21 (40)
DDR2 DIMM
DIMM 1, 2, 3 Cntl
BANK 2 (20)
Inter-FPGA MII Links
BANK 25 (40)BANK 126 BANK 6 (20)
BANK 4 (20)
Global Clock Inputs
UG199_c3_04_050106