AN 496: Using the Internal Oscillator Intel® FPGA IP

ID 683653
Date 4/01/2024

Design Example 1: Targeting a MDN-82 Demo Board ( MAX® II Devices)

Design Example 1 is made to drive the LEDs to create a scrolling effect, thereby demonstrating the internal oscillator using the MDN-82 demo board.

Table 3.  EPM240G Pin Assignments for Design Example 1 Using the MDN-82 Demo Board
EPM240G Pin Assignments
Signal Pin Signal Pin
d2 Pin 69 d3 Pin 40
d5 Pin 71 d6 Pin 75
d8 Pin 73 d10 Pin 73
d11 Pin 75 d12 Pin 71
d4_1 Pin 85 d4_2 Pin 69
d7_1 Pin 87 d7_2 Pin 88
d9_1 Pin 89 d9_2 Pin 90
sw9 Pin 82

Assign the unused pins As input tri-stated in the Quartus® Prime software.

To demonstrate this design on the MDN-B2 demo board, follow these steps:

  1. Turn on the power to the demo board (using slide switch SW1).
  2. Download the design onto the MAX® II CPLD through the JTAG header JP5 on the demo board and a conventional programming cable ( Intel® FPGA Parallel Port Cable or Intel® FPGA Download Cable). Keep SW4 on the demo board pressed before and during the start of the programming process. After it completes, turn off the power and remove the JTAG connector.
  3. Observe the scrolling LED sequence on the red LEDs and the bi-color LEDs. Pressing SW9 on the demo board disables the internal oscillator and freezes the scrolling LEDs at their current positions.