USB_JTAG and Atmega162

Development Boards MicroMod
1

Hello,

I have connected my USB_JTAG dongle on an Atmega162. It works very well with the internal RC oscillator (programmation and debug) witch is a 8 MHz clock. But when i select fuse bit to 16 MHz (My external crystal oscillator) I have some trouble with JTAG. I have this kind of message in ‘Message’ window of AVRStudio:

Error reading memory : IO Address:0 Size:64

Error reading memory : REGISTERS Address:0 Size:32

Error reading memory : SRAM Address:96 Size:160

And all goes wrong :frowning:

Is there some limitation for the USB-JTAG dongle with oscillator frequency?

Thanks for any helps.

David