14 Altera Corporation
Board Components Nios Development Board Reference Manual, Cyclone Edition
Hardware configuration data that implements the Nios reference design
is pre-stored in this flash memory. The pre-loaded Nios reference design,
once loaded, can identify the 8 Mbyte flash memory in its address space
and includes monitor software that can download files (either new
Cyclone configuration data, Nios embedded processor software, or both)
into flash memory. The Nios embedded processor software includes
subroutines for writing and erasing this specific type of AMD flash
memory.
The flash memory device shares address and data connections with the
SRAM chips and the Ethernet MAC/PHY chip. For shared bus
information, see“Appendix A: Shared Bus Table” on page 39.
f
See www.amd.com for detailed information about the flash memory
device.
Compact Flash
Connector
The compact flash connector (CON3) enables hardware designs to access
a compact flash card (see Figure 3). The following two access modes are
supported:
■ ATA (hot swappable mode)
■ IDE (IDE hard disk mode)
Figure 3. Compact Flash Connector
The IDE connection mode includes a power MOSFET which controls
power to the compact flash card. This MOSFET is controllable through an
IO pin on the Cyclone device.
1 The compact flash connector shares several Cyclone I/O pins
with expansion prototype connector header (PROTO1), see
“Expansion Prototype Connector (PROTO1)” on page 19 for
PROTO1 details.
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