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Apple SiP in Apple Watch
The Apple S1 is the integrated computer in the first-generation Apple Watch, and it is described as a "System in Package" (SiP) by Apple Inc.[7]
Samsung is said to be the main supplier of key components, such as the RAM and NAND flash storage, and the assembly itself,[8] but early teardowns reveal RAM and flash memory from Toshiba and Micron Technology.[3]
System-in-Package design[edit]It uses a customized application processor that together with memory, storage and support processors for wireless connectivity, sensors and I/O constitute a complete computer in a single package. This package is filled with resin for durability.[9]
From reverse engineering, the processor handling the Wi-Fi and Bluetooth is a Broadcom BCM43342[10] and the six-axis gyroscope is from STMicroelectronics.[2]
The SiP in Apple Watch Series 1 is called S1P and looks superficially identical to the S1, but in reality is an S2 minus the on-chip GPS functionality. It contains the same dual-core CPU with the same new GPU capabilities as the S2 making it about 50% faster than the S1.[12][13]
The S1 was announced on 9 September 2014 as part of the "Wish we could say more" event.
The S1P was announced on 7 September 2016 as part of the "See you on the 7th" event.
The S1 made its first appearance within the Apple Watch, which arrived in April 2015.[7][14] The S1 was discontinued with the launch of Apple Watch Series 1, containing the S1P.
The S1P was released with the Apple Watch Series 1 on 16 September 2016.[13]
An illustration of the encapsulated S1 package
[9][15]The S1P package shows little of the differences that's encapsulated inside.
This illustration shows the positions of the chips and other components inside the S1 package.
[15]This is how large the S1 is compared to the Apple Watch case.
[15]A size comparison of the S1 to the
Apple A6in the
iPhone 5[15]hardware since 1998
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