Apple S1

The S1 integrated computer, 2.5 cm wide[1]
General information
Launched	13 November 2014
Discontinued	7 September 2016
Designed by	Apple Inc.
Common manufacturer	Samsung[2]
Product code	APL0778[3]
Performance
Max.CPUclock rate	520 MHz[4]
Cache
L1cache	32 KB data[4]
L2 cache	256 KB[4]
Architecture and classification
Application	Apple Watch
Technology node	28 nm[4][2]
Instruction set	ARMv7-A[4]
Physical specifications
Cores	1[4]
GPU	PowerVR SGX543[5]
Products, models, variants
Variant	Apple S1P
History
Successor	Apple S2

Apple S1P

General information
Launched	September, 2016
Discontinued	September, 2018
Designed by	Apple Inc.
Performance
Max.CPUclock rate	520 MHz[6]
Architecture and classification
Application	Apple Watch Series 1
Microarchitecture	ARMv7-A compatible[6]
Instruction set	ARM[6]
Physical specifications
Cores	2[6]
GPU	PowerVR Series 6 'Rogue'[6]
History
Predecessor	Apple S1

TheApple S1 is the integrated computer in theApple Watch, and it is described as a "System in Package" (SiP) byApple Inc.^[7]

Samsung is said to be the main supplier of key components, such as theRAM andNAND flash storage, and the assembly itself,^[8] but early teardowns reveal RAM and flash memory fromToshiba andMicron Technology.^[3]

It uses a customizedapplication processor that together withmemory,storage and support processors for wireless connectivity, sensors andI/O constitute a complete computer in a single package. This package is filled withresin for durability.^[9]

From reverse engineering, the processor handling theWi-Fi andBluetooth is aBroadcom BCM43342^[10] and the six-axisgyroscope is fromSTMicroelectronics.^[2]

• Apple designed32-bitARMv7^[11] basedapplication processor APL0778 as thecentral processing unit (CPU), with an integratedPowerVR SGX543graphics processing unit (GPU).^[5]
• 512 MBDRAM fromElpida,wire bonded on top of the APL0778 CPU
• NFC controller fromNXP
• NFC booster chip fromAMS
• 8 GBflash fromSanDisk andToshiba
• Wireless charging chip fromIDT
• Touch controller fromADI
• Integratedgyro/accelerometer from STMicroelectronics
• BCM43342Wi-Fi/FM/BT combo chip from Broadcom
• Power management unit (PMU) fromDialog Semiconductor

The SiP inApple Watch Series 1 is calledS1P and looks superficially identical to the S1, but in reality is anS2 minus the on-chipGPS functionality. It contains the same dual-core CPU with the same newGPU 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 ofApple 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 theApple A6 in theiPhone 5^[15]

• Apple silicon, the range of ARM-based processors designed by Apple.
• Apple Watch
• Apple S2

• Apple silicon

• Articles with short description
• Short description matches Wikidata
• Use dmy dates from April 2017