參數(shù)資料
型號(hào)： AT43USB353M-AC
廠商： ATMEL CORP
元件分類(lèi)： 微控制器/微處理器
英文描述： Low Cost Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
中文描述： 8-BIT, MROM, 24 MHz, RISC MICROCONTROLLER, PQFP48
封裝： 7 X 7 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, PLASTIC, MS-026BBC, LQFP-48
文件頁(yè)數(shù)： 72/95頁(yè)
文件大?。?/td> 568K
代理商： AT43USB353M-AC
72
AT43USB353M
3307B–USB–4/04
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
AT43USB353M'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.
相關(guān)PDF資料
PDF描述
AT43USB355E-AC Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT43USB355 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:Missed Watchdog Timer Reset
AT43USB355_02 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:Full speed USB Microcontroller with Embedded Hub, ADC and PWM
AT43USB355_06 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
AT43USB355E-AC 功能描述:8位微控制器 -MCU USB GAME CONTROL w/EMBED HUB-COM TEMP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT43USB355E-AU 功能描述:8位微控制器 -MCU USB GAME CONTROL w/ EMBED HUB RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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