{"id":101849,"date":"2021-10-28T16:22:44","date_gmt":"2021-10-28T14:22:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/predstavlena-novaya-plata-raspberry-pi-zero-2-w"},"modified":"2021-10-28T16:22:44","modified_gmt":"2021-10-28T14:22:45","slug":"predstavlena-novaya-plata-raspberry-pi-zero-2-w","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/predstavlena-novaya-plata-raspberry-pi-zero-2-w","title":{"rendered":"En ny Raspberry Pi Zero 2 W-kort har presenterats","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Projektet Raspberry Pi har meddelat att en ny generation av Raspberry Pi Zero W-kortet nu finns tillg\u00e4nglig, som kombinerar kompakt storlek med st\u00f6d f\u00f6r Bluetooth och Wi-Fi. Den nya modellen Raspberry Pi Zero 2 W \u00e4r gjord i samma lilla formfaktor (65 x 30 x 5 mm), vilket inneb\u00e4r att den \u00e4r ungef\u00e4r dubbelt s\u00e5 liten som en vanlig Raspberry Pi. F\u00f6rs\u00e4ljningen har hittills endast b\u00f6rjat i Storbritannien, Europeiska unionen, USA, Kanada och Hongkong, och leveranser till andra l\u00e4nder kommer att \u00f6ppnas allteftersom certifiering av den tr\u00e5dl\u00f6sa modulen slutf\u00f6rs. Priset f\u00f6r Raspberry Pi Zero 2 W \u00e4r 15 USD (f\u00f6r j\u00e4mf\u00f6relse, priset f\u00f6r Raspberry Pi Zero W \u00e4r 10 USD, medan Raspberry Pi Zero kostar 5 USD; produktionen av de billigare korten forts\u00e4tter).

\"En<\/center> <\/p>\n

Den stora skillnaden med den nya modellen Raspberry Pi Zero \u00e4r \u00f6verg\u00e5ngen till SoC Broadcom BCM2710A1, som liknar den som anv\u00e4ndes i Raspberry Pi 3-korten (den f\u00f6reg\u00e5ende generationen av Zero-kort hade SoC Broadcom BCM2835, som i den f\u00f6rsta Raspberry Pi). Till skillnad fr\u00e5n Raspberry Pi 3 har klockfrekvensen f\u00f6r processorn s\u00e4nkts fr\u00e5n 1.4 GHz till 1 GHz f\u00f6r att minska energif\u00f6rbrukningen. Enligt en flerk\u00e4rnig sysbench-test har uppgraderingen av SoC gjort det m\u00f6jligt att \u00f6ka kortets prestanda fem g\u00e5nger (den nya SoC anv\u00e4nder en fyrk\u00e4rnig 64-bitars CPU Arm Cortex-A53 ist\u00e4llet f\u00f6r en ensam 32-bitars ARM11 ARM1176JZF-S). <\/p>\n

Som i den tidigare versionen erbjuder Raspberry Pi Zero 2 W 512MB RAM, en Mini-HDMI-port, tv\u00e5 Micro-USB-portar (USB 2.0 med OTG och en str\u00f6ming\u00e5ng), en microSD-kortplats, en 40-stifts GPIO-kontakt (inte l\u00f6dd), utg\u00e5ngar f\u00f6r kompositvideo och kamera (CSI-2). Kortet \u00e4r utrustat med en tr\u00e5dl\u00f6s chip som st\u00f6der Wi-Fi 802.11 b\/g\/n (2.4GHz), Bluetooth 4.2 och Bluetooth Low Energy (BLE). F\u00f6r att genomg\u00e5 FCC-certifiering och skydd mot externa st\u00f6rningar \u00e4r den tr\u00e5dl\u00f6sa chipen i det nya kortet t\u00e4ckt med ett metallskydd. <\/p>\n

Den integrerade GPU:n i SoC st\u00f6der OpenGL ES 1.1 och 2.0, och erbjuder medel f\u00f6r att accelerera videodekoding i H.264 och MPEG-4 format med kvalitet 1080p30, samt kodning i H.264-format, vilket ut\u00f6kar anv\u00e4ndningsomr\u00e5det f\u00f6r kortet i olika multimediaenheter och smarta hem-system. Tyv\u00e4rr \u00e4r storleken p\u00e5 det operativa minnet begr\u00e4nsat till 512 MB och kan inte \u00f6kas p\u00e5 grund av fysiska begr\u00e4nsningar av kortets storlek. F\u00f6r att tillhandah\u00e5lla 1GB RAM skulle en mer komplicerad flerskiktsdesign kr\u00e4vas, n\u00e5got som utvecklarna f\u00f6r n\u00e4rvarande inte \u00e4r redo att implementera.

\r\n \"Spela\r\n
<\/div>\r\n <\/div> <\/center> <\/p>\n

Huvudproblemet vid utformningen av Raspberry Pi Zero 2 W-kortet var att l\u00f6sa fr\u00e5gan om placeringen av LPDDR2 SDRAM-minnet. I f\u00f6rsta generationens kort placerades minnet i ett extra lager ovanf\u00f6r SoC-chipet, i en l\u00f6sning som realiserades med hj\u00e4lp av PoP-teknik (package-on-package), men i de nya Broadcom-chipsen var det inte m\u00f6jligt att genomf\u00f6ra denna metod p\u00e5 grund av det \u00f6kade SoC-storleken. F\u00f6r att l\u00f6sa det uppkomna problemet utvecklades en speciell variant av chipet i samarbete med Broadcom, d\u00e4r minnet integrerades i SoC.

\"En<\/center> <\/p>\n

Ytterligare ett problem blev den \u00f6kade v\u00e4rmeutvecklingen till f\u00f6ljd av den kraftfullare processorn. Problemet l\u00f6stes genom att l\u00e4gga till tjocka kopparskikt p\u00e5 kortet f\u00f6r att avleda och sprida v\u00e4rmen fr\u00e5n processorn. Viktet p\u00e5 kortet \u00f6kade m\u00e4rkbart, men l\u00f6sningen ans\u00e5gs framg\u00e5ngsrik och visade sig vara tillr\u00e4cklig f\u00f6r att undvika \u00f6verhettning vid en oavbruten stress-test av linj\u00e4r algebra LINPACK vid en omgivningstemperatur p\u00e5 20 grader. <\/p>\n

Bland de konkurrerande enheterna \u00e4r den som ligger n\u00e4rmast Raspberry Pi Zero 2 W det kinesiska kortet Orange Pi Zero Plus2, som har dimensionerna 46 x 48 mm och s\u00e4ljs f\u00f6r 35 USD med 512 MB RAM och Allwinner H3-chip. Orange Pi Zero Plus2 \u00e4r utrustad med 8 GB EMMC Flash, har en fullst\u00e4ndig HDMI-port, TF-kortplats, USB OTG samt kontakter f\u00f6r anslutning av mikrofon, infrar\u00f6d mottagare (IR) och tv\u00e5 extra USB-portar. Kortet har en fyrk\u00e4rnig Allwinner H5-processor (Cortex-A53) med GPU Mali Mali450 eller Allwinner H3 (Cortex-A7) med GPU Mali400MP2. Ist\u00e4llet f\u00f6r en 40-stifts GPIO finns en f\u00f6rkortad 26-stiftskontakt, kompatibel med Raspberry Pi B+. En mindre kraftfull version, Orange Pi Zero 2, finns ocks\u00e5 tillg\u00e4nglig, men den levereras med 1 GB RAM och en Ethernet-port ut\u00f6ver Wi-Fi.
\n
K\u00e4lla: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041f\u0440\u043e\u0435\u043a\u0442 Raspberry Pi \u043e\u0431\u044a\u044f\u0432\u0438\u043b \u043e \u043f\u043e\u0441\u0442\u0443\u043f\u043b\u0435\u043d\u0438\u0438 \u0432 \u043f\u0440\u043e\u0434\u0430\u0436\u0443 \u043d\u043e\u0432\u043e\u0433\u043e \u043f\u043e\u043a\u043e\u043b\u0435\u043d\u0438\u044f \u043f\u043b\u0430\u0442\u044b Raspberry Pi Zero W, \u0441\u043e\u0447\u0435\u0442\u0430\u044e\u0449\u0435\u0439 \u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u044b\u0435 \u0440\u0430\u0437\u043c\u0435\u0440\u044b \u0438 \u043d\u0430\u043b\u0438\u0447\u0438\u0435 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 Bluetooth \u0438 Wi-Fi. \u041d\u043e\u0432\u0430\u044f \u043c\u043e\u0434\u0435\u043b\u044c Raspberry Pi Zero 2 W \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0430 \u0432 \u0442\u043e\u043c \u0436\u0435 \u043c\u0438\u043d\u0438\u0430\u0442\u044e\u0440\u043d\u043e\u043c \u0444\u043e\u0440\u043c-\u0444\u0430\u043a\u0442\u043e\u0440\u0435 (65 x 30 x 5 \u043c\u043c), \u0442.\u0435. \u043f\u0440\u0438\u043c\u0435\u0440\u043d\u043e \u0432 \u0434\u0432\u0430 \u0440\u0430\u0437\u0430 \u043c\u0435\u043d\u044c\u0448\u0435 \u043e\u0431\u044b\u0447\u043d\u043e\u0433\u043e Raspberry Pi. \u041f\u0440\u043e\u0434\u0430\u0436\u0438 \u043f\u043e\u043a\u0430 \u043d\u0430\u0447\u0430\u043b\u0438\u0441\u044c […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":101850,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-101849","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Den nya Raspberry Pi Zero 2 W-kortet \u00e4r h\u00e4r 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