During programming with JTAGICE mkII I measure 3.0-3.15 V on pin 6.
Shouldn't be this pin 6 tied to GND during programming?
I suppose that JTACICE mkII also has some internal pull-up. I added external pull-up 100k resistor in current PCB and on previous PCB 4k7 in parallel with 100k, so that's less than 4k7.
you shouldn't have a powerful pull-up resistor or any capacitive load.
Consider the reset line a high-speed digital signal, and not the normal static reset connection you would. I've never had a problem with the MKII, but have always had nothing on the reset line. I added a jumper to seperate the AVR's reset line from the rest of the board when using the MKII.
So what is recommended resistor value on RESET line?
From time to time JTAGICE doesn't recognize chip, then I power off/on it and board and it's fine then.
I've never had any problems with programming, AVRStudio didn't report any software problems during programming any verifying.
From user guide:
Always switch off the target application power before switching off the JTAGICE mkII. Never leave a powered-down JTAGICE mkII connected to a powered application - current may leak from the application and result in damage to the emulator.
I don't stick to that. And you?
Does it matter what do you power on/off first?
Thanks guys !