Need help: Nios II Development Kit, Stratix II Edition

Hello,

I'm a freshman working on the Nios II Development Kit, Stratix II Edition. I want to use this Development Kit to control a vedio decoder.This vedio decoder is designed to work with 3.3V signals, and are not tolerant of 5V signals.

I know the proto1 & proto2 connectors on the development kit can output 5V signals. The Reference manual http://www.altera.com.cn/literature/manual/mnl_nios2_board_stratixii_2s60_rohs.pdf

said ,

"The output logic-level on the expansion prototype connector pins is 3.3 V." -page27.

I don't know how to use the proto1 & proto2 connectors to output 3.3V signals. Can you tell me the answer?

Or is there any other connectors on the board can output 3.3V signal which is controlled by the FPGA?

Many thanks!

Sincerely

Tannya