2–44
Chapter 2: Board Components
Memory
Cyclone IV GX FPGA Development Board
August 2015
Altera Corporation
Reference Manual
SSRAM
The SSRAM consists of a single standard synchronous SRAM device with a 100-TQFP
package footprint. This device has 4 MB of memory with a 18-bit data bus but is
implemented for non-linear burst mode using only a 16-bit data bus. The device
speed is 200 MHz single-data-rate. There is no minimum speed for this device.
This device is part of the shared FSM bus which connects to the flash memory, SRAM,
and MAX
II CPLD EPM2210 System Controller.
Table 2–40
lists the SSRAM
pin assignments, signal names, and functions. The signal
names and types are relative to the Cyclone IV GX device in terms of I/O setting and
direction.
Table 2–40. SSRAM Pin Assignments, Schematic Signal Names, and Functions (Part 1 of 2)
Board Reference
Description
Schematic Signal Name
I/O Standard
Cyclone IV GX Device
Pin Number
U44.46
Address bus
FSM_A1
1.8-V
AD6
U44.44
Address bus
FSM_A2
AK29
U44.42
Address bus
FSM_A3
AA21
U44.37
Address bus
FSM_A4
AG25
U44.36
Address bus
FSM_A5
AH5
U44.48
Address bus
FSM_A6
AH27
U44.43
Address bus
FSM_A7
AJ12
U44.49
Address bus
FSM_A8
AF16
U44.47
Address bus
FSM_A9
AH20
U44.39
Address bus
FSM_A10
AK23
U44.35
Address bus
FSM_A11
AH17
U44.34
Address bus
FSM_A12
AB21
U44.50
Address bus
FSM_A13
AF19
U44.45
Address bus
FSM_A14
AF12
U44.33
Address bus
FSM_A15
AG27
U44.32
Address bus
FSM_A16
AK26
U44.100
Address bus
FSM_A17
AH4
U44.80
Address bus
FSM_A18
AK3
U44.81
Address bus
FSM_A19
AH9
U44.99
Address bus
FSM_A20
AG6
U44.82
Address bus
FSM_A21
AK25
U44.23
Data bus
FSM_D0
AK14
U44.59
Data bus
FSM_D1
AE6
U44.22
Data bus
FSM_D2
AG21
U44.63
Data bus
FSM_D3
AE9
U44.68
Data bus
FSM_D4
AK28
U44.72
Data bus
FSM_D5
AD23
U44.12
Data bus
FSM_D6
AG24