
2–6 Reference Manual Altera Corporation
Nios Development Board Cyclone II Edition May 2007
Board Components
SSRAM Chip
(U74)
U74 is a 32-bit, 2 Mbyte Cypress SSRAM chip. Depending on the board
revision, the part number is CY7C1380C-167AC or CY7C1380D-167AXC.
The chip is rated for synchronous accesses up to 167 MHz. U74 connects
to the FPGA so it can be used by a Nios II embedded processor as general-
purpose memory. The factory-programmed Nios II reference design
identifies the SSRAM devices in its address space as a contiguous 2
Mbyte, 32-bit-wide, zero-wait-state main memory.
Table 2–5. Dual Seven-Segment Display
FPGA Pin U8 & U9 Pin Pin Function Board Net Name
U8
AE13 10 a hex_0A
AF13 9 b hex_0B
AD12 8 c hex_0C
AE12 5 d hex_0D
AA12 4 e hex_0E
Y12 2 f hex_0F
V113ghex_0G
U12 7 dp hex_0DP
U9
V14 10 a hex_1A
V139bhex_1B
AD11 8 c hex_1C
AE11 5 d hex_1D
AE10 4 e hex_1E
AF10 2 f hex_1F
AD10 3 g hex_1G
AC11 7 dp hex_1DP
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