Altera Stratix IV GX FPGA Development Board - Manual (Page 56)

2–48 Chapter 2: Board Components
Memory
Stratix IV GX FPGA Development Board, 530 Edition Reference Manual November 2010 Altera Corporation
Memory
This section describes the board’s memory interface support, signal names, types, and
connectivity relative to the Stratix IV GX device. The board has the following memory
interfaces:
■ DDR3 Bottom Port
■ DDR3 Top Port
■ QDRII+ Top Port 0
■ QDRII+ Top Port 1
■ SSRAM
■ Flash
f
For more information about the memory interfaces, refer to the External Memory
Interface Handbook .
DDR3 Bottom Port
The DDR3 bottom port consists of four DDR3 devices, providing a single 512-Mbyte
interface with a 64-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 2–46 lists the DDR3 DIMM pin assignments, signal names, and functions. The
signal names and types are relative to the Stratix IV device in terms of I/O setting and
direction.
Table 2–46. DDR3 Bottom Port Pin Assignments, Schematic Signal Names, and Functions (Part 1 of 4)
Board Reference Description Schematic Signal
Name
I/O Standard
Stratix IV GX
Device
Pin Number
U5, U12, U18, U24 pin T7 Address bus DDR3BOT_A14
1.5-V SSTL Class I
AJ14
U5, U12, U18, U24 pin T3 Address bus DDR3BOT_A13 AN15
U5, U12, U18, U24 pin N7 Address bus DDR3BOT_A12 AE14
U5, U12, U18, U24 pin R7 Address bus DDR3BOT_A11 AJ13
U5, U12, U18, U24 pin L7 Address bus DDR3BOT_A10 AE16
U5, U12, U18, U24 pin R3 Address bus DDR3BOT_A9 AK14
U5, U12, U18, U24 pin T8 Address bus DDR3BOT_A8 AH13
U5, U12, U18, U24 pin R2 Address bus DDR3BOT_A7 AP15
U5, U12, U18, U24 pin R8 Address bus DDR3BOT_A6 AG14
U5, U12, U18, U24 pin P2 Address bus DDR3BOT_A5 AL15
U5, U12, U18, U24 pin P8 Address bus DDR3BOT_A4 AF16
U5, U12, U18, U24 pin N2 Address bus DDR3BOT_A3 AT14