Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Config Done Fails to Go high with simple SOF file(Jtag+USB Blaster)

Hello All, Finlay we have got our boards and started testing them out... We were able to successfully Detect the Cyclone 3 120 chip and run Jtag Debug tests, but not been able to configure the ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

as the vcio has been connected to nCE instead of a supply voltage, could it be that this pin does not provide enough current for the io of the usb blaster ? it is just an idea that this not low impedance supply could have an effect on the driver side between usb blaster (JTAG) and the target....

also i still try to recover why i have in mind that my fae told me that i must use vcca=2,5V and must not use 3,0v i also have in my design to aviod 3,3V signal problems cyclone 3 can have ...