FT245 in DE2 Board

[Altera_Forum]

Hi, 

 In my DE2 board embedded usb blaster have a problem.(USB not detecting).So i suspect on FT chip and replaced it with new one.Now USB is detected shows unknown device :cry:

[Altera_Forum]

Unknown device is hardware problem. Check how did You solder it. If everything is correct, then it should show FTDI USB to serial bridge. 

Later, You will need to update the internal eeprom, VID/PID numbers.

[Altera_Forum]

Can it work before? If did, change a usb cable or your PC port first.  

FT245B's config is in an external chip, and FT245R's config is build-in. If you replace a FT245R, you may restore the config.

[Altera_Forum]

Ya i have tested cables, its working fine. Its FT245BM it has external eeprom(93C46) 

Now i am suspecting on SN6550(Because its showing partial short of A & B pins of it).

[Altera_Forum]

Hi all, 

 I have the solution to my problem. I bought the DE1 board with the usb blaster  the first time it was recognised as usb<->serial  what i did: download FTprog form FTDI, whit this you can configuer the FTDI chip, also if it dousnt work in quartus. next you have to check that the vendor ID and Product id are the same as in the USBblaster .inf driver. this values were wrong.  right settings: costum VID/PID : Costum VID/PID (not FTDI Default) Vendor ID : 09FB (not 0403) Product ID : 6001 USB version nummer USB 2.0  Bus Powered 100mAmps USB remote Wake Up :off Pull Down :On  Manufacturer : Altera (not FTDI) Product Description: USB-Blaster Serial number enabled: checked Auto Generate Serial No. Uncheched Serial Number 91d28401 or Prefix : 91   this worked for me (v91sp2)  FIRST SAVE THE OLD CONTENT TO A XML FILE SO YOU CAN RESTORE THE SETTINGS  I HOPE YOU GET IT UP

[Altera_Forum]

I ll try and let you know. Actually board i have given board for rework. 

Thanks.