Altera Stratix IV E FPGA Development Board - Manual (Page 55)

Chapter 2: Board Components 2–47
Memory
May 2011 Altera Corporation Stratix IV E FPGA Development Board Reference Manual
Table 2–44 lists the DDR3 component references and manufacturing information.
QDR II+ SRAM
The 72-Mb QDR II+ consists of a single QDR II+ burst-of-4 SRAM, providing 4-MB
memory interface with an 18-bit read data bus and an 18-bit write data bus. The
default I/O voltage for the QDR II+ SRAM and the Stratix IV E FPGA is 1.5 V. Placing
a shunt on jumper J11 provides 1.8 V for VDDQ.
This memory interface is designed to run between 120 MHz, the minimum frequency
for this device, and at a maximum frequency of 400 MHz. The internal bus in the
FPGA is typically 2 or 4 times the width at full rate or half rate respectively. For
example, a 400-MHz 18-bit interface becomes a 200-MHz 72-bit bus.
Table 2–45 lists the QDR II+ SRAM pin assignments, signal names, and functions.
Table 2–44. DDR3 Component References and Manufacturing Information
Board Reference Description Manufacturer
Manufacturing
Part Number
Manufacturer
Website
B2
533-MHz 2-GB DDR3
SDRAM UDIMM 256M x72
Micron MT18JSF25672AY-1G1 www.micron.com
J20
DDR3 240-pin DIMM
Socket
AMP/Tyco 1932000-6 www.tycoelectronics.com
Table 2–45. QDR II+ SRAM Pin Assignments, Schematic Signal Names, and Functions (Part 1 of 3)
Board Reference Description
Schematic Signal Name
I/O Standard
Stratix IV E Device
Pin Number
U11.A9 Address bus QDRII_A0
1.5-V HSTL Class I
D14
U11.B4 Address bus QDRII_A1 E14
U11.B8 Address bus QDRII_A2 A15
U11.C5 Address bus QDRII_A3 A14
U11.C7 Address bus QDRII_A4 C14
U11.N5 Address bus QDRII_A5 C7
U11.N6 Address bus QDRII_A6 A6
U11.N7 Address bus QDRII_A7 F14
U11.P4 Address bus QDRII_A8 D7
U11.P5 Address bus QDRII_A9 B8
U11.P7 Address bus QDRII_A10 D9
U11.P8 Address bus QDRII_A11 E10
U11.R3 Address bus QDRII_A12 E8
U11.R4 Address bus QDRII_A13 D8
U11.R5 Address bus QDRII_A14 B7
U11.R7 Address bus QDRII_A15 A8
U11.R8 Address bus QDRII_A16 C9
U11.R9 Address bus QDRII_A17 F15
U11.A3 Address bus QDRII_A18 B13
U11.A10 Address bus QDRII_A19 D15