Altera Cyclone III LS FPGA Development Board - Manual (Page 49)

Chapter 2: Board Components 2–41
Memory
© October 2009 Altera Corporation Cyclone III LS FPGA Development Board Reference Manual
Table 2–41 lists the SSRAM component reference and manufacturing information.
Flash
The flash interface consists of a single synchronous flash memory device, providing
64 Mbyte with a 16-bit data bus. This device is part of the shared FSM bus which
connects to the flash memory, SRAM, and MAX II CPLD EPM2210 System Controller.
There are two 256-Mbyte die per package with A(25) low selecting the lower die and
A(25) high selecting the upper die. The parameter blocks are 32 K and main blocks are
128 K. The parameters of this device are located at both the top and bottom of the
address space.
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 µs for a single word and
440 µs 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.
U14.A7 Byte write enable SRAM_BWEn
2.5-V
AH8
U14.B5 Byte lane 0 write enable SRAM_BWn0 AC12
U14.A5 Byte lane 1 write enable SRAM_BWn1 AH11
U14.A4 Byte lane 2 write enable SRAM_BWn2 AH4
U14.B4 Byte lane 3 write enable SRAM_BWn3 AE22
U14.B3 Chip enable SRAM_CE2 —
U14.A6 Chip enable SRAM_CE3n —
U14.A3 Chip enable SRAM_CEn AH10
U14.B6 Clock SRAM_CLK AG25
U14.N11 Data bus parity byte lane 0 SRAM_DQP0 AD19
U14.C11 Data bus parity byte lane 1 SRAM_DQP1 AF22
U14.C1 Data bus parity byte lane 2 SRAM_DQP2 AE8
U14.N1 Data bus parity byte lane 3 SRAM_DQP3 AE17
U14.B7 Global write enable SRAM_GWn AC19
U14.R1 Mode SRAM_MODE —
U14.B8 Output enable SRAM_OEn AB13
U14.H11 Sleep SRAM_ZZ AH14
Table 2–40. SSRAM Pin Assignments, Schematic Signal Names, and Functions (Part 3 of 3)
Board Reference Description Schematic Signal Name I/O Standard
Cyclone III LS Device
Pin Number
Table 2–41. SSRAM Component Reference and Manufacturing Information
Board Reference Description Manufacturer
Manufacturing
Part Number
Manufacturer
Website
U14 Standard Synchronous Pipelined
SCD, 512 K × 36, 200 MHz ISSI Inc. IS61VPS51236A-250B3 www.issi.com