How to change JTAG speed on programmer GUI - How to change JTAG speed on programmer GUI I'm using quartus17 and quartus13 version. Some board needs to be slow down the pof file programming speed which use CFI flash device. How to slow down the JTAG speed? I can't find any setting on the GUI. Thank you very much. Replies: Re: How to change JTAG speed on programmer GUI This is not available for changing on ByteBlaster I (versus ByteBlaster II). Can you provide details for ByteBlaster (I). Thank you. Replies: Re: How to change JTAG speed on programmer GUI Hi Ash_R_Intel OK, I get it. Thank you, Ash_R_Intel, very much. Replies: Re: How to change JTAG speed on programmer GUI Hi, Sorry I missed to note the Quartus version earlier. There is no option in older Quartus versions to change the JTAG frequency. The option is available in version 19.1 standard edition onwards. If possible, please move to newer version of Quartus. Regards Replies: Re: How to change JTAG speed on programmer GUI Hi Ash_R_Intel Thank you, Ash_R_Intel, very much. I'm using quartus17 lite and quartus13 standard version. I can't find the "Hardware frequency" in the Hardware Setup GUI. Can I set it in other place? Thank you very much. Replies: Re: How to change JTAG speed on programmer GUI Hi, To change the JTAG clock frequency, Open Programmer tool, click on Hardware Setup. In the pop-up window, Hardware Settings tab, you can change the value in Hardware frequency field. See the attached screen shot. Hope this helps. Regards