Apple S2

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]

Apple S2

General information
Launched	September, 2016
Discontinued	September, 2017
Designed by	Apple Inc.
Common manufacturer	TSMC
Performance
Max. CPU clock rate	520 MHz[1]
Architecture and classification
Application	Apple Watch Series 2
Technology node	16 nm
Instruction set	ARM – ARMv7-A
Physical specifications
Cores	2[1]
Products, models, variants
Variant	Apple S1P
History
Predecessor	Apple S1
Successor	Apple S3

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.

See also

• Apple silicon, the range of ARM-based processors designed by Apple.
• Apple Watch

References

1. 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.
2. Merritt, Rick (September 7, 2016). "Apple Debuts Three Custom Chips". EE Times. Archived from the original on September 13, 2016. Retrieved October 25, 2017.
3. "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.
4. 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.
5. "Apple Wartch Series 2 Teardown". iFixit. September 15, 2016. Archived from the original on October 7, 2020. Retrieved October 22, 2017.
6. 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.