Apple motion coprocessors
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).
The NXP LPC18A1, also known as the M7 motion coprocessor
The LPC18A1, also known as the Apple M7. Manufactured week 29 in 2013.
The size difference between the A7 and the smaller LPC18A1
The LPC18B1, also known as the Apple M8. Manufactured week 28 in 2014.
A coprocessor is a computer processor used to supplement the functions of the primary processor. Operations performed by the coprocessor may be floating-point arithmetic, graphics, signal processing, string processing, cryptography or I/O interfacing with peripheral devices. By offloading processor-intensive tasks from the main processor, coprocessors can accelerate system performance. Coprocessors allow a line of computers to be customized, so that customers who do not need the extra performance do not need to pay for it.
AM9511-1 arithmetic coprocessor
Intel 80386DX CPU with 80387DX math coprocessor