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參數資料
| 型號： | AT43USB355M-AU |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Full-speed USB Microcontroller with Embedded Hub, ADC and PWM |
| 中文描述： | 8-BIT, MROM, 12 MHz, RISC MICROCONTROLLER, PQFP64 |
| 封裝： | 1.40 MM, GREEN, PLASTIC, MS-026ACB, LQFP-64 |
| 文件頁數： | 90/115頁 |
| 文件大?。?/td> | 610K |
| 代理商： | AT43USB355M-AU |
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90
AT43USB355
2603G–USB–04/06
USB Hub
The hub in a USB system provides for the electrical interface between USB devices and the
host. The major functions that the hub must supports are:
Connectivity
Power management
Device connect and disconnect
Bus fault detection and recovery
Full speed and low speed device support
A hub consists of two major components: a hub repeater and a hub controller. The hub
repeater is responsible for:
Providing upstream connectivity between the selected device and the Host
Managing connectivity setup and tear-down
Handling bus fault detection and recovery
Detecting connect/disconnect on each port
The Hub Controller is responsible for:
Hub enumeration
Providing configuration information to the host
Providing status of each port to the host
Controlling each port per host command
The first two tasks of the Hub Controller are similar to that of a USB function and will not be
described in detail in the following section. The descriptions will cover the features of the
AT43USB355's hub and how to program it to make a USB-compliant hub.
Control transactions for the Hub Control End-point proceed exactly the same way as those
described for the embedded function. The operation of the hub's End-point 1 is fully imple-
mented in the hardware and does not need any firmware support. Any status changes within
the Hub will automatically update Hub End-point 1, which will be sent to the host at the next IN
token that is addressed to it. If no change has occurred, the interrupt end-point will respond
with a NAK.
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相關代理商/技術參數 |
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|---|---|
| AT43USB370 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:USB 2.0 Full-Speed Host/Function Processor |
| AT43USB370E-AC | 功能描述:USB 接口集成電路 USB HOST DEVICE CONTROL - COM TEMP RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| AT43USB380 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:On-The-Go Upgrade of the AT43USB370 USB 2.0 Full-Speed Host/Function Processor |
| AT43USB380E-AC | 功能描述:USB 接口集成電路 USB OTG/HOST/FUNC DEVICE CNTRL RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| AT43USB380E-AI | 功能描述:USB 接口集成電路 USB OTG/HOST/FUNC DEVICE CNTRL RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
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