I was using avrstudio6.0+mkII(Ver7.19),the CPU is AT32UC3C2512C. They worked well.
Yesterday, I updated the avstudio to 6.1.2730(newest). The mkII updated from 7.19 to 7.24.
Now there is a major problem. The device id read by mkII is 0x4200003F which matched with AT32UC3C0512C. I can't go on with programming or debugging.
What's wrong with the mkII? Is this a bug of new firmware? I wish I can roll back to 7.19