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Reference Manual
Altera Corporation
Cyclone III FPGA Starter Board
October 2007
Memory
DDR SDRAM
The Cyclone III FPGA starter board has a 4M x 16 x 4 DDR SDRAM.
lists DDR SDRAM board reference and manufacturing
information.
shows the DDR SDRAM signal name, corresponding FPGA
pin, signal direction, type and board reference U4 DDR pin.
Table 2–14. DDR SDRAM Manufacturing Information
Board Reference
Description
Manufacturer
Manufacturer Part Number
U4
4M x16 x 4 DDR SDRAM
PowerChip
Semiconductor
A2S56D40CTP-G5PP
Table 2–15. DDR SDRAM Pinout (Part 1 of 2)
Signal Name
FPGA Pin
Direction
Type
U4 (DDR) Pin
ddr_dqs0
U3
Bidirectional
SSTL-2
16
ddr_dqs1
T8 Bidirectional
SSTL-2
51
ddr_dm0
V3 Output
SSTL-2
47
ddr_dm1
V8 Output
SSTL-2
20
ddr_ba0
V11 Output
SSTL-2
26
ddr_ba1
V12 Output
SSTL-2
27
ddr_cas_n
T4 Output
SSTL-2
22
ddr_cke
R13 Output
SSTL-2
44
ddr_cs_n
V1 Output
SSTL-2
24
ddr_ras_n
V16 Output
SSTL-2
23
ddr_we_n
U15 Output
SSTL-2
21
ddr_clk
U2 Bidirectional
SSTL-2
45
ddr_clk_n
V2 Bidirectional
SSTL-2
46
ddr_a0
U1 Output
SSTL-2
29
ddr_a1
U5 Output
SSTL-2
30
ddr_a2
U7 Output
SSTL-2
31
ddr_a3
U8 Output
SSTL-2
32
ddr_a4
P8 Output
SSTL-2
35
ddr_a5
P7 Output
SSTL-2
36
ddr_a6
P6 Output
SSTL-2
37
ddr_a7
T14 Output
SSTL-2
38