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2–42
Chapter 2: Board Components
Memory
Cyclone V GX FPGA Development Board
May 2013
Altera Corporation
Reference Manual
Synchronous SRAM
The development board supports a 18-MB standard synchronous SRAM for
instruction and data storage with low-latency random access capability. The device
has a 1024K x 18-bits interface. This device is part of the shared FSM bus that connects
to the flash memory, SRAM, and MAX V CPLD 5M2210 System Controller.
The device speed is 200 MHz single-data-rate. There is no minimum speed for this
device. The theoretical bandwidth of this interface is 3.2 Gbps for continuous bursts.
The read latency for any address is two clocks while the write latency is one clock.
Table 2–31
lists the SSRAM pin assignments, signal names, and functions.
Table 2–31. SSRAM Pin Assignments, Schematic Signal Names, and Functions (Part 1 of 2)
Board
Reference (U37)
Schematic
Signal Name
Cyclone V GX
Pin Number
I/O Standard
Description
86
FLASH_OEN
M8
2.5-V
Output enable
87
FLASH_WEN
J15
2.5-V
Write enable
37
FSM_A1
N10
2.5-V
Address bus
36
FSM_A2
N9
2.5-V
Address bus
44
FSM_A3
M12
2.5-V
Address bus
42
FSM_A4
M11
2.5-V
Address bus
34
FSM_A5
G7
2.5-V
Address bus
47
FSM_A6
G8
2.5-V
Address bus
43
FSM_A7
F6
2.5-V
Address bus
46
FSM_A8
G6
2.5-V
Address bus
45
FSM_A9
J10
2.5-V
Address bus
35
FSM_A10
K10
2.5-V
Address bus
32
FSM_A11
E6
2.5-V
Address bus
33
FSM_A12
E7
2.5-V
Address bus
50
FSM_A13
D6
2.5-V
Address bus
48
FSM_A14
D7
2.5-V
Address bus
100
FSM_A15
A2
2.5-V
Address bus
99
FSM_A16
A3
2.5-V
Address bus
82
FSM_A17
D8
2.5-V
Address bus
80
FSM_A18
E8
2.5-V
Address bus
49
FSM_A19
F8
2.5-V
Address bus
81
FSM_A20
G9
2.5-V
Address bus
39
FSM_A21
H9
2.5-V
Address bus
58
FSM_D0
E13
2.5-V
Data bus
59
FSM_D1
F13
2.5-V
Data bus
62
FSM_D2
C6
2.5-V
Data bus
63
FSM_D3
C7
2.5-V
Data bus
68
FSM_D4
A6
2.5-V
Data bus
69
FSM_D5
B6
2.5-V
Data bus