Patatha zaka zitatu ndi theka Raspberry Pi 3 Raspberry Pi Foundation mibadwo yatsopano ya matabwa . Mtundu wa "B" ulipo kale kuti upangidwe, SoC BCM2711 yatsopano, yomwe ndi mtundu wokonzedwanso wa chipangizo cha BCM283X chomwe chinagwiritsidwa ntchito kale, chopangidwa pogwiritsa ntchito ukadaulo wa 28nm. Mtengo wa bolodi sunasinthe ndipo ukadali madola 35 aku US.
SoC imaphatikizaponso ma cores anayi a 64-bit ARMv8 ndipo imathamanga pafupipafupi pang'ono (1.5GHz m'malo mwa 1.4GHz). Nthawi yomweyo, kusintha kwaukadaulo kunapangitsa kuti zitheke kusintha Cortex-A53 ndi maziko apamwamba a Cortex-A72, omwe adatengera magwiridwe antchito pamlingo watsopano. Kuphatikiza apo, kusintha kwachitika pakugwiritsa ntchito kukumbukira kwa LPDDR4, komwe, poyerekeza ndi kukumbukira komwe kunagwiritsidwa ntchito kale kwa LPDDR2, kumapereka kuwonjezeka katatu kwa bandwidth. Zotsatira zake, pakuyesa magwiridwe antchito board yatsopanoyo imaposa mtundu wakale wa Raspberry Pi 3B + ndi nthawi 2-4.
Kusiyana kwina kwakukulu kumaphatikizapo kuphatikizika kwa wolamulira wa PCI Express, madoko awiri a USB 3.0 (kuphatikiza madoko awiri a USB 2.0) ndi madoko awiri a Micro HDMI (omwe kale anali HDMI amtundu wathunthu), kukulolani kuti muwonetse zithunzi pazowunikira ziwiri zokhala ndi 4K. . VideoCore VI graphics accelerator yasinthidwa kwambiri, yomwe imathandizira OpenGL ES 3.0 ndipo imatha kujambula kanema wa H.265 ndi khalidwe la 4Kp60 (kapena 4Kp30 pazitsulo ziwiri). Mphamvu zitha kuperekedwa kudzera pa USB-C (yomwe kale inali USB yaying'ono-B), kudzera pa GPIO kapena posankha PoE HAT (Mphamvu pa Ethernet).
Kuphatikiza apo, vuto lomwe lakhalapo kwanthawi yayitali lokhala ndi RAM yosakwanira lathetsedwa - bolodi tsopano imaperekedwa m'mitundu ndi 1, 2 ndi 4 GB ya RAM (yodula $ 35, $ 45 ndi $ 55, motsatana), zomwe zimapangitsa bolodi latsopano kukhala yankho loyenera kwa kupanga malo ogwirira ntchito, nsanja zamasewera, ndi maseva, zipata zanyumba zanzeru, magawo owongolera maloboti ndi makina amakono a multimedia.
Wowongolera wa Gigabit Ethernet wasinthidwa, womwe tsopano walumikizidwa ku SoC kudzera pa basi ya RGMII, yomwe imalola kuti ikwaniritse ntchito yolengezedwa yonse. USB tsopano ikugwiritsidwa ntchito kudzera mwa wolamulira wina wa VLI wolumikizidwa kudzera pa PCI Express ndikupereka kutulutsa kwathunthu kwa 4Gbps. Monga kale, bolodi ili ndi ma doko a 40 GPIO, DSI (kulumikizana kwa skrini), CSI (kulumikizana kwa kamera) ndi chipangizo chopanda zingwe chomwe chimathandizira muyezo wa 802.11ac, kugwira ntchito pa 2.4GHz ndi 5GHz ndi Bluetooth 5.0.
Panthawi imodzimodziyo, kutulutsidwa kwatsopano kwa kugawa kunasindikizidwa , yomwe imapereka chithandizo chonse cha Raspberry Pi 4. Kutulutsidwako kumadziwikanso chifukwa cha kusintha kwa phukusi la Debian 10 "Buster" (lomwe kale linali Debian 9), kukonzanso kwakukulu kwa mawonekedwe ogwiritsira ntchito komanso kuphatikizidwa kwa dalaivala watsopano wa Mesa V3D ndi zidathandizira kwambiri chithandizo cha 3D (kuphatikiza kupezeka ndi OpenGL kufulumizitsa msakatuli). Misonkhano iwiri yakonzedwa kuti itsitsidwe - yofupikitsidwa () pamakina a seva ndi kumaliza (), zoperekedwa ndi malo ogwiritsa ntchito (mphanda yochokera ku LXDE). Kukhazikitsa kuchokera Pali pafupifupi 35 zikwi phukusi zilipo.
Source: opennet.ru