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