page_title: Raspberry Pi
section_title: Processor
hierarchical_section_title: Raspberry Pi / Hardware / Processor
caption_attribution_description: The Raspberry Pi 2 (model B), showing an HDMI port, audio/video port, Micro USB power input and two ribbon connectors. The Raspberry Pi 2 is an inexpensive ($35) and self-contained micro-computer that features a 900 MHz, 32-bit quad-core ARM processor and 1 GB of RAM. Built by the Raspberry Pi Foundation, it is designed to be an easy and accessible platform to promote computer science. The Pi has also become a popular computer for hobbyists, who use it for personal projects, video game emulators and digital media playback.
context_page_description: The Raspberry Pi is a series of small single-board computers developed in the United Kingdom by the Raspberry Pi Foundation to put the power of computing and digital making into the hands of people all over the world. If at the beginning the aims of the Raspberry Pi project were leaned towards the promotion of teaching of basic computer science in schools and in developing countries, it rapidly expanded into a wider range of uses, as the original model became far more popular than anticipated, selling outside its target market for uses such as robotics. It is now widely used even in research projects, such as for weather monitoring because of its low cost and portability. It does not include peripherals or cases. However, some accessories have been included in several official and unofficial bundles.
  After the release of the second board type, the Raspberry Pi Foundation set up a new entity, named Raspberry Pi Trading, and installed Eben Upton as CEO, with the responsibility of developing technology. The Foundation was rededicated as an educational charity for promoting the teaching of basic computer science in schools and developing countries.
context_section_description: All SoCs used in Raspberry Pis are custom-developed under collaboration of Broadcom and Raspberry Pi Foundation.
  The Broadcom BCM2835 SoC used in the first generation Raspberry Pi includes a 700 MHz ARM1176JZF-S processor, VideoCore IV graphics processing unit (GPU), and RAM. It has a level 1 (L1) cache of 16 KiB and a level 2 (L2) cache of 128 KiB.  The level 2 cache is used primarily by the GPU. The SoC is stacked underneath the RAM chip, so only its edge is visible. The ARM1176JZ(F)-S is the same CPU used in the original iPhone, although at a higher clock rate, and mated with a much faster GPU.
  The earlier V1.1 model of the Raspberry Pi 2 used a Broadcom BCM2836 SoC with a 900 MHz 32-bit, quad-core ARM Cortex-A7 processor, with 256 KiB shared L2 cache.  The Raspberry Pi 2 V1.2 was upgraded to a Broadcom BCM2837 SoC with a 1.2 GHz 64-bit quad-core ARM Cortex-A53 processor, the same SoC which is used on the Raspberry Pi 3, but underclocked (by default) to the same 900 MHz CPU clock speed as the V1.1. The BCM2836 SoC is no longer in production as of late 2016.
  The Raspberry Pi 3 Model B uses a Broadcom BCM2837 SoC with a 1.2 GHz 64-bit quad-core ARM Cortex-A53 processor, with 512 KiB shared L2 cache. The Model A+ and B+ are 1.4 GHz
  The Raspberry Pi 4 uses a Broadcom BCM2711 SoC with a 1.5 GHz 64-bit quad-core ARM Cortex-A72 processor, with 1 MiB shared L2 cache. Unlike previous models, which all used a custom interrupt controller poorly suited for virtualisation, the interrupt controller on this SoC is compatible with the ARM Generic Interrupt Controller (GIC) architecture 2.0, providing hardware support for interrupt distribution when using ARM virtualisation capabilities.
  The Raspberry Pi Zero and Zero W use the same Broadcom BCM2835 SoC as the first generation Raspberry Pi, although now running at 1 GHz CPU clock speed.
caption: The Raspberry Pi 2B uses a 32-bit 900 MHz quad-core ARM Cortex-A7 processor.
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