Motion coprocessor
The NXP LPC18A1, also known as the M7 motion coprocessor
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| Produced | From September 2013 to present |
|---|---|
| Designed by | NXP Semiconductors |
| Common manufacturer(s) |
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| Max. CPU clock rate | 150 MHz |
| Min. feature size | 90 nm |
| Instruction set | ARMv7-M |
| Microarchitecture | Cortex-M3 |
| Product code | M7: LPC18A1 M8: LPC18B1 |
| Cores | 1 |
The Apple M-series coprocessors are motion coprocessors used by Apple Inc. in their mobile devices. First released in 2013, their function is to collect sensor data from integrated accelerometers, gyroscopes and compasses and offload the collecting and processing of sensor data from the main central processing unit (CPU).
As of May 2017[update] the M-series coprocessors so far released have been the M7 (codename Oscar), the M8, the M9 the M10, and the M11. The M7 was introduced in September 2013 with the iPhone 5S and the updated version, M8 was introduced in September 2014 with the iPhone 6 and also processes data from the barometer that is included in the iPhone 6 and iPad Air 2. September 2015 brought the M9 motion coprocessor embedded within the A9 chip found in the iPhone 6S, iPhone 6S Plus, iPhone SE and within the A9X chip found in the iPad Pro. Apple announced the latest addition to its motion coprocessors, the M11, September 2017, found in the iPhone 8 and iPhone 8 Plus and iPhone X.
Chipworks found that the M7 most likely is a NXP LPC1800 based microcontroller called LPC18A1. It uses an ARM Cortex-M3 core with a customised packaging and naming scheme indicating that it is for an Apple customized part.iFixit have identified the M8 in the iPhone 6 to be an NXP device with a very similar name, the LPC18B1.
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