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Altera_Forum's avatar
Altera_Forum
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15 years ago

jtag pin voltage levels

I am trying to connect cyclone 4 device with a usb blaster programmer Will there be a problem with the attached voltage levels and resistors?
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

You are saying that

"For the EPCS interface, I used to read a VCCIO suggestion of 3.3V for the respective bank"

I cant do that. In this design the FPGA(related bank) has to work at 2.5 V.

Assuming FPGA VCC is 2.5V what is your suggestion about

a) Voltage of pin 4 (should I keep 3.3)

b) Voltage of EPCS64 (Should I keep 3.3)