You can get Marvell's spec sheets on ... the Armada 610 SoCs at: http://www.marvell.com/products/processors/applications/armada_600/armada610...
That spec sheet is kinda skimpy. In a discussion of CPU performance for the XO-1.75, Chris Ball said "we're now using a dual-issue CPU". I was not sure what that phrase meant (perhaps "dual core"?) - but this cited Marvell spec sheet did not clarify that about the Armada 610/MMP2.
mikus