AN 490: Altera MAX Series as Voltage Level Shifters

ID 683233
Date 9/22/2014

1.2.1. Voltage Level Shifter Design Demonstration on the MDN-B2 Demo Board

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

  1. Set voltage jumpers on the MDN-B2 demo board corresponding to the voltage-level translation voltages; that is, VCCIO1 voltage is set to 2.5V with jumpers on JP9 and VCCIO2 voltage set to 1.8V using a jumper on JP7 of the demo board.
  2. Switch on power to the MDN-B2 demo board (using slide switch SW1).
  3. Download the design on to the MAX II through the JTAG header JP5 on the MDN-B2 demo board and a conventional programming cable such as ByteBlaster™ II or USB-Blaster™. Keep SW4 on the demo board pressed as you begin the programming process. Turn off power after the programming.
  4. Switch on SW1 (power) and set any 8-bit data on the input bus by using the DIP switch SW3 on the demo board. These switches switch to logic 0 in their ON position and vice versa.
  5. Observe and measure shifted voltage levels from VCCIO1 levels (2.5-V logic high level) on the input bus to VCCIO2 (1.8-V logic high level) and on the output bus on JP8. Map the DIP switch positions 1, 2, 3, 4, 5, 6, 7, and 8 to the output pins 20, 18, 16, 14, 12, 10, 8 and 6 on the output header JP8, respectively.