Altera Stratix II GX EP2SGX90 Transceiver Signal Integrity Development Board - Manual (Page 40)

2–30 Reference Manual Altera Corporation
Stratix II GX EP2SGX90 Transceiver Signal Integrity Development Board May 2006
Flash Memory
Flash Memory To support the board’s out-of-the-box configuration option, flash
memory is available on the board. The flash memory also provides a
second option when storing non-volatile memory for the Nios II
processor’s user code. Therefore, the non-volatile memory can either be
stored in internal memory (after configuration with an EPCS64 device) or
in flash memory.
The on-board flash memory provides two main benefits:
■ Provides a second option when storing non-volatile memory
■ Useful when a smaller density, but migratable device, is used on the
board but does not have enough internal memory to support the
demo design.
To reduce the flash controller’s development cycle, a common flash
interface (CFI) flash memory is used. This provides device-specific
information to the system, allowing host software to easily reconfigure
for different flash devices. On this board, the CFI controller available in
the Quartus II SOPC Builder library is used, which reduces development
time when interfacing with flash memory.
The on-board flash memory is the Spansion LLC S29GL128N11TFI020,
which is a 128-Mbit memory module. The memory is available in either a
56-pin TSOP or a 64-pin FBGA. For simplicity and cost effectiveness, the
board uses the TSOP package.