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There are two motion coprocessors implemented as an independent chip to the system-on-a-chip.
- LPC18A1 (M7) - A7 devices: iPad Air, iPad mini 2, iPad mini 3, iPhone 5s
- LPC18B1 (M8) - A8 devices: iPad Air 2, iPhone 6, iPhone 6 Plus
As of A9, the motion coprocessor is integrated into the SoC.