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2–46
Chapter 2: Board Components
Memory
Cyclone IV GX FPGA Development Board
August 2015
Altera Corporation
Reference Manual
Flash
The flash interface consists of a single synchronous flash memory device, providing
64 MB of memory with a 16-bit data bus. This device is part of the shared FSM bus
which connects to the flash memory, SRAM, LCD, and MAX II CPLD EPM2210
System Controller.
This 16-bit data memory interface can sustain burst read operations at up to 52 MHz
for a throughput of 832 Mbps. The write performance is 125
s for a single word and
440
s for a 32-word buffer. The erase time is 400 ms for a 32 K parameter block and
1200 ms for a 128 K main block.
f
For more information about the flash memory map storage, refer to the
Cyclone IV GX
Development Kit User Guide
.
Table 2–42
lists the flash 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 2–42. Flash 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
U6.F6
Address valid
FLASH_ADVn
1.8-V
F24
U6.B4
Chip enable
FLASH_CEn
E25
U6.E6
Clock
FLASH_CLK
Y21
U6.F8
Output enable
FSM_OEn
F7
U6.F7
Ready
FLASH_RDYBSYn
B7
U6.D4
Reset
FLASH_RESETn
A28
U6.G8
Write enable
FSM_WEn
C13
U6.C6
Write protect
FLASH_WPn
Pulled high
U6.A1
Address bus
FSM_A1
AD6
U6.B1
Address bus
FSM_A2
AK29
U6.C1
Address bus
FSM_A3
AA21
U6.D1
Address bus
FSM_A4
AG25
U6.D2
Address bus
FSM_A5
AH5
U6.A2
Address bus
FSM_A6
AH27
U6.C2
Address bus
FSM_A7
AJ12
U6.A3
Address bus
FSM_A8
AF16
U6.B3
Address bus
FSM_A9
AH20
U6.C3
Address bus
FSM_A10
AK23
U6.D3
Address bus
FSM_A11
AH17
U6.C4
Address bus
FSM_A12
AB21
U6.A5
Address bus
FSM_A13
AF19
U6.B5
Address bus
FSM_A14
AF12
U6.C5
Address bus
FSM_A15
AG27