{"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\/pt\/blog\/news\/predstavlena-novaya-plata-raspberry-pi-zero-2-w","title":{"rendered":"Foi apresentada a nova placa Raspberry Pi Zero 2 W","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

O projeto Raspberry Pi anunciou a chegada ao mercado de uma nova gera\u00e7\u00e3o da placa Raspberry Pi Zero W, que combina tamanho compacto com suporte a Bluetooth e Wi-Fi. O novo modelo Raspberry Pi Zero 2 W tem o mesmo formato miniatura (65 x 30 x 5 mm), ou seja, \u00e9 aproximadamente duas vezes menor que o Raspberry Pi comum. As vendas come\u00e7aram apenas no Reino Unido, na Uni\u00e3o Europeia, nos EUA, no Canad\u00e1 e em Hong Kong; as entregas para outros pa\u00edses ser\u00e3o iniciadas \u00e0 medida que o m\u00f3dulo sem fio passar pela certifica\u00e7\u00e3o. O pre\u00e7o do Raspberry Pi Zero 2 W \u00e9 de 15 d\u00f3lares americanos (para compara\u00e7\u00e3o, o pre\u00e7o da placa Raspberry Pi Zero W \u00e9 de $10, enquanto a Raspberry Pi Zero custa $5, e a produ\u00e7\u00e3o de placas mais baratas continuar\u00e1).

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

A principal diferen\u00e7a do novo modelo Raspberry Pi Zero \u00e9 a transi\u00e7\u00e3o para o uso do SoC Broadcom BCM2710A1, semelhante ao utilizado nas placas Raspberry Pi 3 (na gera\u00e7\u00e3o anterior, as placas Zero usavam o SoC Broadcom BCM2835, como no primeiro Raspberry Pi). Ao contr\u00e1rio do Raspberry Pi 3, para reduzir o consumo de energia, a frequ\u00eancia do processador foi reduzida de 1.4GHz para 1GHz. De acordo com o teste multithread sysbench, a atualiza\u00e7\u00e3o do SoC permitiu aumentar o desempenho da placa em 5 vezes (o novo SoC utiliza um CPU Quad-Core 64 bits Arm Cortex-A53 em vez do \u00fanico n\u00facleo de 32 bits ARM11 ARM1176JZF-S). <\/p>\n

Assim como na edi\u00e7\u00e3o anterior, o Raspberry Pi Zero 2 W oferece 512MB de RAM, porta Mini-HDMI, duas portas Micro-USB (USB 2.0 com OTG e porta para alimenta\u00e7\u00e3o), slot microSD, conector GPIO de 40 pinos (n\u00e3o soldado), sa\u00eddas para v\u00eddeo composto e c\u00e2mera (CSI-2). A placa \u00e9 equipada com um chip sem fio que suporta Wi-Fi 802.11 b\/g\/n (2.4GHz), Bluetooth 4.2 e Bluetooth Low Energy (BLE). Para a certifica\u00e7\u00e3o FCC e prote\u00e7\u00e3o contra interfer\u00eancias externas, o chip sem fio na nova placa est\u00e1 coberto por um inv\u00f3lucro met\u00e1lico. <\/p>\n

O GPU integrado no SoC suporta OpenGL ES 1.1 e 2.0, e fornece recursos para acelera\u00e7\u00e3o da decodifica\u00e7\u00e3o de v\u00eddeo nos formatos H.264 e MPEG-4 com qualidade 1080p30, bem como codifica\u00e7\u00e3o em H.264, o que amplia o uso da placa em diversos dispositivos multim\u00eddia e sistemas de casa inteligente. Infelizmente, a tamanho da mem\u00f3ria RAM \u00e9 limitado a 512 MB e n\u00e3o pode ser expandido devido a restri\u00e7\u00f5es f\u00edsicas do tamanho da placa. Para fornecer 1GB de RAM, seria necess\u00e1ria a aplica\u00e7\u00e3o de uma constru\u00e7\u00e3o multicamada mais complexa, que os desenvolvedores ainda n\u00e3o est\u00e3o prontos para implementar.

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

O principal desafio no design da placa Raspberry Pi Zero 2 W foi a quest\u00e3o do posicionamento da mem\u00f3ria LPDDR2 SDRAM. Na primeira gera\u00e7\u00e3o da placa, a mem\u00f3ria era colocada em uma camada adicional sobre o chip SoC, utilizando a tecnologia PoP (package-on-package), mas nos novos chips Broadcom, essa abordagem n\u00e3o era vi\u00e1vel devido ao aumento do tamanho do SoC. Para resolver essa quest\u00e3o, uma vers\u00e3o especial do chip foi desenvolvida em conjunto com a Broadcom, na qual a mem\u00f3ria foi integrada ao SoC.

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

Outro problema foi o aumento da dissipa\u00e7\u00e3o de calor devido ao uso de um processador mais potente. A solu\u00e7\u00e3o encontrada foi adicionar camadas espessas de cobre \u00e0 placa para dissipar e dispersar o calor do processador. O peso da placa aumentou consideravelmente, mas a abordagem foi considerada bem-sucedida e foi suficiente para evitar o superaquecimento durante um teste de estresse de tempo ilimitado do LINPACK em uma temperatura ambiente de 20 graus. <\/p>\n

Entre os dispositivos concorrentes, a placa chinesa Orange Pi Zero Plus2 \u00e9 a que mais se aproxima do Raspberry Pi Zero 2 W, possuindo dimens\u00f5es de 46\u00d748 mm e sendo vendida por 35 d\u00f3lares, com 512MB de RAM e chip Allwinner H3. A placa Orange Pi Zero Plus2 vem equipada com 8 GB de EMMC Flash, possui uma porta HDMI completa, slot para cart\u00e3o TF, USB OTG, al\u00e9m de contatos para conex\u00e3o de microfone, receptor infravermelho (IR) e duas portas USB adicionais. Ela \u00e9 alimentada por um processador quad-core Allwinner H5 (Cortex-A53) com GPU Mali Mali450 ou Allwinner H3 (Cortex-A7) com GPU Mali400MP2. Em vez de um conector GPIO de 40 pinos, ela possui um conector reduzido de 26 pinos, compat\u00edvel com o Raspberry Pi B+. Tamb\u00e9m est\u00e1 dispon\u00edvel uma placa menos poderosa, a Orange Pi Zero 2, mas que vem equipada com 1 GB de RAM e uma porta Ethernet, al\u00e9m do Wi-Fi.
\n
Fonte: 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\udd47 Nova placa Raspberry Pi Zero 2 W apresentada | 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