According to a report from ExtremeTech, AMD will shift its 28nm APUs from Globalfoundries to TSMC. In the process of switching foundries, the company has cancelled its Wichita and Krishna APUs, the 28nm successors to its C-Series (codenamed Ontario) and E-Series (codenamed Zacate) chips for budget notebooks and low-power computing devices. The decision by AMD to drop its Wichita and Krishna APUs and shift its 28nm manufacturing process to TSMC was also driven by the slow and low-yield production from Globalfoundries.
This may translate to longer shelf lives for the C and E-Series APUs, probably until the end of 2012 unless AMD ramps up its efforts in developing its next generation Kabini and Samara APUs. AMD may also decide to release 28nm Ontario and Zacate APUs after their move over to TSMC. Do watch this space as we keep track of any developments from the chip maker.