Can a moderator please move this to In System Debugging and Programmers? * Done. Ross.*
I was reading a similar topic in this sub-forum when I created this, and didn't think to change it, my bad.
I've just got some new boards in today, and wanted to try out JTAG instead of ISP.
Problem is, when I try to read the device signature I get an error saying my Read Voltage is outside the range.
Sometimes its 1.3v, and sometimes its 2v, but I've measured it with my multi-meter, and there is 5v on the JTAG port, so something weird is happening.
MCU is 32u4, and programmer is an ICE.
ISP works fine, I've flashed the 32u4, and its working as a USB device. Only thing not working is JTAG.
Exact error message is...
Read voltage 1.3v is outside selected device's operating range: 2.7v to 5.5v. Do you want to continue?
I guess I should also mention the JTAG port on my board is a 2.54mm pitch connector, so I had to make a 2.54mm to 1mm adapter, there are no shorts, and each pin is connected correctly.
Anyone know what could be causing this, or what I could try to get it working?
Edit: I also forgot to mention, I've tried continuing, I just get another error, which is..
No JTAG devices detected. Debugger command Activate physical failed. Unable to enter programming mode. Verify device selection, interface settings, target power, security bit, and connections to the target device. Timestamp: 2019-07-15 21:41:03.295 Severity: ERROR ComponentId: 20100 StatusCode: 1 ModuleName: TCF (TCF command: Device:startSession failed.) No JTAG devices detected. Debugger command Activate physical failed.