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USB4,2019年,USB-IF在USB 3.2的基礎(chǔ)上整合了雷電3協(xié)議(簡(jiǎn)稱TBT3),推出了USB4 Gen 2x2和USB4 Gen 3x2。這次改名和以往不同的是依然保留了USB 3.2的名字。USB4就是在原先USB 3.2傳輸速度基礎(chǔ)上進(jìn)行了倍增,達(dá)到了40Gbps,也就是USB4 Gen 3x2的速度。USB4同時(shí)支持USB 3.2和TBT3的傳輸。總之,USB4=USB 3.2+TBT3。USB4和USB 3.2一樣,也有單通道模式和雙通道模式。USB4接口和USB 3.2接口一樣,都支持搭載USB PD快充協(xié)議。
USB4整合了多個(gè)協(xié)議,可以同時(shí)支持更多設(shè)備,其中就涉及到帶寬的分配,從下圖可以看出USB4最多分配22Gbps的帶寬用于數(shù)據(jù)傳輸,最少18G的帶寬用于支持顯示。可以連接一個(gè)分辨率為5120x2880(5k),刷新率60Hz,色深30bit的顯示器,剩下18Gbps的帶寬用于傳輸數(shù)據(jù);也可以連接兩個(gè)分辨率4096x2160(4k),刷新率60Hz,色深30bit的視頻,剩下8Gbps的帶寬用于傳輸數(shù)據(jù)。 

 

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    USB, is abbreviation of"Universal Serial BUS". It is an external bus standard to standardize the connectiondu of computer and peripheral equipment and communications. Is the application interface in the PC fieldtechnology。 USB interface, Plug and Play and hot swap support equipment functions, USB is the end of 1994by Intel, Compaq, IBM, Microsoft and other companies jointly proposed
    USB,是 Universal Serial BUS(通用串行總線)的縮寫,是一個(gè)外部總線標(biāo)準(zhǔn),用于規(guī)范電腦與外部設(shè)備的連接和通訊.是應(yīng)用在PC領(lǐng)域的接口技術(shù).USB接口支持設(shè)備的即插即用和熱插拔功能.
   The fourth Generation: USB 3.1(USB 3.1 Gen2) maximum transfer rate of 10Gbps, downward compatible with USB1.1/2.0/3.0
第四代:USB3.1(USB 3.1 Gen2)最大傳輸速率10Gbps,向下兼容USB1.0/1.1/2.0/3.0

 

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    USB, is abbreviation of"Universal Serial BUS". It is an external bus standard to standardize the connectiondu of computer and peripheral equipment and communications. Is the application interface in the PC fieldtechnology。 USB interface, Plug and Play and hot swap support equipment functions, USB is the end of 1994by Intel, Compaq, IBM, Microsoft and other companies jointly proposed
    USB,是 Universal Serial BUS(通用串行總線)的縮寫,是一個(gè)外部總線標(biāo)準(zhǔn),用于規(guī)范電腦與外部設(shè)備的連接和通訊.是應(yīng)用在PC領(lǐng)域的接口技術(shù).USB接口支持設(shè)備的即插即用和熱插拔功能.
   The Third Generation: USB 3.0 (USB 3.1 Gen1)maximum transfer rate of 5Gbps, downward compatible with USB1.1/2.0

第三代:USB3.0(USB 3.1 Gen1)最大傳輸速率5Gbps,向下兼容USB1.0/1.1/2.0

 

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    USB, is abbreviation of"Universal Serial BUS". It is an external bus standard to standardize the connectiondu of computer and peripheral equipment and communications. Is the application interface in the PC fieldtechnology。 USB interface, Plug and Play and hot swap support equipment functions, USB is the end of 1994by Intel, Compaq, IBM, Microsoft and other companies jointly proposed
    USB,是 Universal Serial BUS(通用串行總線)的縮寫,是一個(gè)外部總線標(biāo)準(zhǔn),用于規(guī)范電腦與外部設(shè)備的連接和通訊.是應(yīng)用在PC領(lǐng)域的接口技術(shù).USB接口支持設(shè)備的即插即用和熱插拔功能.
    The first generation: USB 1.0/1.1's maximum transmission rate of 12Mbps。 Introduced in 1996
第一代:USB1.0/1.1的最大傳輸速率為12Mbps。1996年推出

    The second generation: USB 2.0 transfer rate up to the maximum 480Mbps USB 1.0/1.1 and USB 2.0 interface is compatible
第二代:USB2.0的最大傳輸速率高達(dá)480Mbps.USB1.0/1.1與USB2.0的接口是相互兼容的。

 

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