Specifications

70 Altera Corporation
EPXA10 Development Board Hardware Reference Manual
General Usage
Guidelines
To use the development board properly, and to avoid damage to it, follow
the guidelines in this section.
Anti-static Handling
Before handling the card, you should take proper anti-static precautions,
otherwise the board can be damaged.
SDR SDRAM to DIMM Data Bus Connections
To avoid conflict between the 64-bit SDRAM bus and the 32-bit general
purpose memory data bus, ensure that only the desired portion of the bus
is enabled at any one time. See “SDR SDRAM Interface” on page 59 for
details.
Unused EPXA10 Device Pins
All unused general-purpose I/O EPXA10 device pins have been allocated
to the expansion headers. To avoid unnecessary power consumption and
possible contention, unused pins must be left in the high impedance
(input) state. Follow the steps below to put the unused EPXA10 device
pins into a high-impedance state:
1. Run the Quartus II software.
2. Choose Compiler Settings (Processing menu).
3. Click the Chips & Devices tag.
4. Click the Device & Pin Options button.
5. Click the Unused Pins tag.
6. Under Reserve all unused pins, select As inputs, tri-stated.
All the critical control lines for the interfaces on the board are pulled
to the inactive state.
 If a device is not used, it can be ignored and the EPXA10 device
interface pins left as inputs.