Altera High-Speed Development Kit, Stratix GX Edition - Manual (Page 122)

7–40 Quartus II Version 3.0 Altera Corporation
Nios Designs High-Speed Development Kit, Stratix GX Edition User Guide
Figure 7–19. Stratix Nios Flash Memory & Ethernet Logic Diagram
The Nios processor controls three Avalon bus slave modules. The first
module handles all of the I/O signals and timing for the Stratix GX EPC16
configuration device. It controls the data, address, and controls signals
and reports status to the Nios processor. The second module controls
both the Stratix EPC16 device and the 4-Mbyte on-board flash chip. It is
configured with extra address signals for the on-board flash chip. The
third module interfaces with the LAN91C111 chip.
The test has two C programs: one to test the memories and one for the
LAN chip. The memory tests write the address of a location to that
location and read it back to confirm that the write operation was
successful. It repeats this operation for each memory device. If a
mismatch is found, it reports the error to the shell.
The Ethernet chip test runs the hello_plugs program. The test gives two
different results depending on whether the board is attached to a
network. If a board is not connected, the test initializes the chip and looks
for the network, but because the board is not connected, the test generates
timeouts. If a board is connected, the test uses DHCP to get a dynamic IP
address for the board.
On-Board
Flash
Stratix GX Address
Stratix GX Data
Stratix Address
Stratix Data
21
Add[20:0]
Data[15:0]
Add[20:0]
Data[15:0]
Add[21:0] Data[16:0]
22
16
16
Stratix Device
Stratix GX
EPC16
Stratix
EPC16
MAC/PHY
(LAN91C111)
Integrated
RJ-45 Connector
A[14:0] D[31:0]
15 32 15
Status &
Control
4
RS-232
Port
Avalon
Bus
Inerface
Avalon
Bus
Interface
Avalon
Bus
Interface
Avalon
Bus
Nios
CPU