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Apple S2
General information
Launched	September, 2016
Discontinued	September, 2017
Designed by	Apple Inc.
Common manufacturer	TSMC;
Performance
Max. CPU clock rate	520 MHz
Architecture and classification
Application	Apple Watch Series 2
Technology node	16 nm
Instruction set	ARM – ARMv7-A
Physical specifications
Cores	2;
Products, models, variants
Variant	Apple S1P;
History
Predecessor	Apple S1
Successor	Apple S3

The Apple S2 is the integrated computer in the Apple Watch Series 2, and it is described as a "System in Package" (SiP) by Apple Inc. It was revealed on September 7, 2016, with very little info about specifications.^[2] Apple says its two cores deliver 50% higher performance and the GPU delivers twice as much as the predecessor, the Apple S1.^[3] The S1P SiP shipped in the Apple Watch Series 1 is a stripped down version of the S2 that lacks the GPS functionality, it is otherwise identical.^[4]

System-in-Package design

It uses a customized application processor that together with 512 MB memory,^[1] 8 GB storage^[1] and support processors for wireless connectivity, GPS, sensors and I/O constitute a complete computer in a single package. This package is filled with resin for durability.

Components

The device integrates discrete components like Wi-Fi, Bluetooth, GPS, NFC, touch controller, accelerometers, barometric sensor^[5] and RAM. In total, there are 42 individual silicon dies^[6] integrated into the single S2 component.

Images

An illustration of the encapsulated S2 package
This is how large the S2 is compared to the Apple Watch Series 2 case.

References

^ ^a ^b ^c ^d Chester, Brandon (December 20, 2016). "The Apple Watch Series 2 Review: Building Towards Maturity". AnandTech. Archived from the original on October 22, 2017. Retrieved October 12, 2017.
^ Merritt, Rick (September 7, 2016). "Apple Debuts Three Custom Chips". EE Times. Archived from the original on September 13, 2016. Retrieved October 25, 2017.
^ "Apple introduces Apple Watch Series 2, the ultimate device for a healthy life" (Press release). Apple. September 7, 2016. Archived from the original on November 16, 2017. Retrieved October 25, 2017.
^ Benjamin, Jeff (October 4, 2016). "PSA: The Apple Watch Series 1 is just as fast as Series 2". 9to5mac.com. Archived from the original on November 8, 2021. Retrieved October 22, 2017.
^ "Apple Wartch Series 2 Teardown". iFixit. September 15, 2016. Archived from the original on October 7, 2020. Retrieved October 22, 2017.
^ Gingerich, Mandi; Morrison, Jim (September 28, 2017). "Apple Watch Series 2 Teardown". TechInsights. Archived from the original on April 19, 2017. Retrieved October 22, 2017.