Specifications

Altera Corporation 13
EPXA10 Development Board Hardware Reference Manual
Board Profile
The development board comprises 14 layers, which are used as follows:
■ 10 signal layers
■ Full 3.3-V power plane
■ 2 ground layers
■ Analog ground layer
The board dimensions are 11.5” × 8”.
Power Supply
The board includes connectors that support both laboratory bench power
supplies and commercially-available, PC-style power supplies (ATX). A
status LED is provided for each power supply. If you are not using devices
attached to the PCI connectors, only the 3.3-V supply is necessary, but to
use devices on the PCI connectors, you need an ATX power supply to
provide the different voltages.
An ATX supply provides voltage levels of ±12 V, ±5 V, and +3.3 V to the
development board, from which it derives the V
REF
, +2.5 V, and +1.8 V
supplies.
 Ensure that the voltage setting on the ATX power supply is set to
the appropriate voltage based on what your AC power outlet
provides.
 For a bench supply with connectors, connect only GND and 3.3 V.
1.8 V and 2.5 V are outputs from the board, and should not be
connected.
Tables 1 through 4 list the estimated power requirements for the
development board.
Table 1. ±12.0-V Supply Requirements
Module mA (12 V) mA (–12 V)
PCIs 500 100
Table 2. 5.0-V Supply Requirements
Module A (5 V)
PCI
Depends on system
CLK_REF
Alternative crystal oscillator