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Chapter 2: Board Components
Memory
Stratix IV GX FPGA Development Board, 530 Edition Reference Manual
November 2010
Altera Corporation
DDR3 Top Port
The DDR3 top port consists of a single DDR3 devices, providing 128 Mbyte with a
16-bit data bus. The board supports addressing for up to 4 times the memory if larger
devices become available.
This memory interface is designed to run between 300 MHz, the minimum frequency
for DDR3, and 533 MHz for a maximum theoretical bandwidth of over 68.2 Gbps. The
internal bus in the FPGA is typically 2 or 4 times the width at full rate or half rate
respectively. For example, a 533 MHz 64-bit interface will become a 267 MHz 256-bit
bus.
Table 2–48
lists the DDR3 top port pin assignments, signal names, and its functions.
The signal names and types are relative to the Stratix IV device in terms of I/O setting
and direction.
Table 2–48. DDR3 Top Port Pin Assignments, Signal Names and Functions (Part 1 of 2)
Board Reference
Description
Schematic Signal
Name
I/O Standard
Stratix IV GX
Device
Pin Number
U14.T7
Address bus
DDR3TOP_A14
1.5-V SSTL Class I
B20
U14.T3
Address bus
DDR3TOP_A13
M22
U14.N7
Address bus
DDR3TOP_A12
A23
U14.R7
Address bus
DDR3TOP_A11
A19
U14.L7
Address bus
DDR3TOP_A10
B23
U14.R3
Address bus
DDR3TOP_A9
M21
U14.T8
Address bus
DDR3TOP_A8
F21
U14.R2
Address bus
DDR3TOP_A7
M20
U14.R8
Address bus
DDR3TOP_A6
G21
U14.P2
Address bus
DDR3TOP_A5
P19
U14.P8
Address bus
DDR3TOP_A4
D21
U14.N2
Address bus
DDR3TOP_A3
R20
U14.P3
Address bus
DDR3TOP_A2
N19
U14.P7
Address bus
DDR3TOP_A1
C22
U14.N3
Address bus
DDR3TOP_A0
D19
U14.M3
Bank address bus
DDR3TOP_BA2
A14
U14.N8
Bank address bus
DDR3TOP_BA1
E23
U14.M2
Bank address bus
DDR3TOP_BA0
B14
U14.J3
Row address select
DDR3TOP_RASn
A24
U14.K3
Column address select
DDR3TOP_CASn
B19
U14.L2
Chip select
DDR3TOP_CSn
D15
U14.L3
Write enable
DDR3TOP_WEn
C19
U14.K1
Termination enable
DDR3TOP_ODT
K15
U14.K9
Clock enable
DDR3TOP_CKE
A25
U14.J7
Clock P
DDR3TOP_CK_P
D24
U14.K7
Clock N
DDR3TOP_CK_N
C24