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• 8-Mbyte Single Data Rate Synchronous Dynamic RAM memory chip
• Organized as 1M x 16 bits x 4 banks
• Accessible as memory for the Nios II processor and by the DE1 Control Panel
Flash memory
• 4-Mbyte NAND Flash memory (1 Mbyte on some boards)
• 8-bit data bus
• Accessible as memory for the Nios II processor and by the DE1 Control Panel
SD card socket
• Provides SPI mode for SD Card access
• Accessible as memory for the Nios II processor with the DE1 SD Card Driver
Pushbutton switches
• 4 pushbutton switches
• Debounced by a Schmitt trigger circuit
• Normally high; generates one active-low pulse when the switch is pressed
Toggle switches
• 10 toggle switches for user inputs
• A switch causes logic 0 when in the DOWN (closest to the edge of the DE1 board) position
and logic 1 when in the UP position
Clock inputs
• 50-MHz oscillator
• 27-MHz oscillator
• SMA external clock input
Audio CODEC
• Wolfson WM8731 24-bit sigma-delta audio CODEC
• Line-level input, line-level output, and microphone input jacks
• Sampling frequency: 8 to 96 KHz
• Applications for MP3 players and recorders, PDAs, smart phones, voice recorders, etc.
VGA output
• Uses a 4-bit resistor-network DAC
• With 15-pin high-density D-sub connector
• Supports up to
640x480 at 100-Hz refresh rate
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