Board Components
Flash Memory (U17)
U17 is a 16-Mbyte AMD AM29LV128M flash memory device connected
to the Stratix II device. It can be used for two purposes:
■
A Nios II embedded processor implemented in the Stratix II device
can use the flash as general-purpose readable memory and
non-volatile storage.
■
The flash memory can hold a Stratix II device configuration file that
is used by the configuration controller to load the Stratix II device at
power-up.
Hardware configuration data that implements the Nios II reference
design is pre-stored in this flash memory. The factory programmed
Nios II reference design, once loaded, can identify the 16-Mbyte flash
memory in its address space, and can program new data (either new
Stratix II configuration data, Nios II embedded processor software, or
both) into flash memory. The Nios II embedded processor software
includes subroutines for writing and erasing this specific type of AMD
flash memory.
Table 20 lists the reference information for the Flash memory.
Table 20. Flash Memory Reference
Item
Description
Board reference
U17
AM29LV128MH103REI
Flash Memory
AMD
Part number
Device description
Manufacturer
Manufacturer web site
www.amd.com
SDRAM Memory (U39 and U40)
The SDRAM devices (U39 and U40) are 2 Micron MT48LC4M32B2
devices with PC100 functionality and self refresh mode. The SDRAM is
fully synchronous with all signals registered on the positive edge of the
system clock.
The SDRAM device pins are connected to the Stratix II device. An
SDRAM controller peripheral is included with the Stratix II DSP
Development Kit, allowing a Nios II processor to view the SDRAM
devices as a large, linearly-addressable memory.
Altera Corporation
27
Preliminary
ALTERA [ ALTERA CORPORATION ]
