5
• 4-Mbyte Flash memory
• SD Card socket
• 4 pushbutton switches
• 10 toggle switches
• 10 red user LEDs
• 8 reen user LEDs
• 50-MHz oscillator and 27-MHz oscillator for clock sources
• 24-bit CD-quality audio CODEC with line-in, line-out, and microphone-in jacks
• VGA DAC (4-bit resistor network) with VGA-out connector
• RS-232 transceiver and 9-pin connector
• PS/2 mouse/keyboard connector
• Two 40-pin Expansion Headers with diode protection
• Powered by either a 7.5V DC adapter or a USB cable
In addition to these hardware features, the DE1 board has software support for standard I/O
interfaces and a control panel facility for accessing various components. Also, software is provided
for a number of demonstrations that illustrate the advanced capabilities of the DE1 board.
In order to use the DE1 board, the user has to be familiar with the Quartus II software. The
necessary knowledge can be acquired by reading the tutorials Getting Started with Altera’s DE1
Board and Quartus II Introduction (which exists in three versions based on the design entry method
used, namely Verilog, VHDL or schematic entry). These tutorials are provided in the directory
DE1_tutorials on the DE1 System CD-ROM that accompanies the DE1 board and can also be
found on Altera’s DE1 web pages.
2.2 Block Diagram of the DE1 Board
Figure 2.2 gives the block diagram of the DE1 board. To provide maximum flexibility for the user,
all connections are made through the Cyclone II FPGA device. Thus, the user can configure the
FPGA to implement any system design.
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