{"id":42477,"date":"2015-02-02T12:15:05","date_gmt":"2015-02-02T10:15:05","guid":{"rendered":"http:\/\/www.cqdx.ru\/ham\/?p=42477"},"modified":"2023-09-26T15:23:14","modified_gmt":"2023-09-26T13:23:14","slug":"new-raspberry-pi-2-released","status":"publish","type":"post","link":"https:\/\/www.cqdx.ru\/ham\/diy\/new-raspberry-pi-2-released\/","title":{"rendered":"New Raspberry Pi 2 Released"},"content":{"rendered":"

A deep discussion with Raspberry Pi founder about a new generation of Raspberry Pi by MAKE Magazine<\/a><\/p>\n

\"rpi_front\"<\/a>Photo by makezine.com<\/em><\/span><\/p>\n

\"rpi_back\"<\/a>Photo by makezine.com<\/em><\/span><\/p>\n

On the face of it the new Raspberry Pi 2 looks very similar to the Model B+<\/a>, so similar in fact that if you sit them down next to each other the only\u00a0way to tell them apart for sure is to flip the boards over and check for the presence of the SDRAM chip. Because unlike the Model B+<\/a> which used the same package-on-package (PoP) memory as the original Model B<\/a>, the new board has moved the RAM off-board to a separate chip.<\/p>\n

The two boards look so similar because the\u00a0main\u00a0change to the Pi isn\u2019t\u00a0visible \u2014 the single 700MHz ARMv6 core has been replaced by a quad core ARMv7 running at 900MHz. While there are some other minor changes, the only other major change beyond this has been to\u00a0increase the onboard memory from 512MB to 1GB.<\/p>\n

Although while idling the new Pi will not consume any\u00a0more power than the previous generation of boards, when all\u00a0four cores are being used the new board will consume more power and \u2014 due to increased leakage \u2014 will get much hotter. Hot enough that you might want to think about adding a heat sink<\/a>, especially if you intend to overclock the chip.<\/p>\n

While the new board ships with the cores clocked at 900MHz we\u2019ve been told that it\u2019ll run comfortably overclocked to higher speeds. So comfortably in fact that it was originally intended to ship the boards clocked to 800MHz and this was only changed in the last few days leading up to launch \u2014 no doubt there will be some people that\u2019ll want to push the boundaries even further, to higher speeds.<\/p>\n

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\u201cWe were being conservative on the frequency in case we encountered issues in production. In practice, we\u2019ve found we\u2019re fine at 900MHz, with significant overclocking headroom over that.\u00a0\u201d \u2014 Eben Upton, CEO at Raspberry Pi<\/p>\n<\/blockquote>\n

The\u00a0shift from an ARMv6 to ARMv7 is an important move for the Foundation as the original Pi was one of the few boards in widespread circulation using the older v6 architecture, and as a result some software projects had no plans<\/a> to ever support it. Beyond that, efforts like Ubuntu Core for connected devices<\/a>\u00a0\u2014 which is only supported on ARMv7 and x86 \u2014 can be easily ported to the new generation of Pi boards.<\/p>\n

However while the new board will need an ARMv7 kernel and modules, user space binaries built for ARMv6 can continue to be used, which means that the new board is fully software compatible with existing Raspberry Pi distributions of Linux.<\/p>\n

So from today you should\u00a0be able to \u2018apt-get upgrade\u2019<\/em> on an existing Raspbian<\/a>\u00a0installation to add an ARMv7 kernel to your distribution. The SD card can then be used \u2014 assuming it\u2019s a Micro SD Card \u2014 to boot either a first or second generation Pi. Card images, along with a new NOOBS<\/a> image, will also be posted that support both boards.<\/p>\n

When we sat down and\u00a0talked\u00a0with\u00a0Eben\u00a0last week ahead of today\u2019s launch, we also tried to dig into some of the more technical points behind the design of the new generation of boards.<\/p>\n

In-Depth with the Raspberry Pi 2<\/div><\/div>
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