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參數資料
| 型號： | W722 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | Universal Serial Bus (USB) Hub/Compound Device Controller(通用串行總線集線器/混合設備控制器) |
| 中文描述： | 通用串行總線（USB）集線器/復合設備控制器（通用串行總線集線器/混合設備控制器） |
| 文件頁數： | 10/18頁 |
| 文件大小： | 229K |
| 代理商： | W722 |
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W722 USB Hub/Compound Device Controller
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8
Oki Semiconductor
FUNCTIONAL DESCRIPTION
The W722 provides Oki’s SIE, a HCC, a HR, and a status/descriptor/register file block in four highly
integrated submodules. The submodule partitioning allows custom configurations to be easily devel-
oped. Oki also offers optional USB FIFO Controller and Application Interface Logic Modules to form a
USB Compound Device function.
Serial Interface Engine
Oki’s SIE handles the USB communication protocol and performs:
Clock generation
Packet sequencing
Signal generation/detection
CRC generation/checking
Bit-stuffing
PacketID generation/decoding
When the W722 is in a compound device application, the Oki SIE can be shared by both the Hub function
and the embedded function.
Core Controller
The HCC includes:
A request parser to interpret the host requests/tokens to both the default Endpoint 0 and the Status
Change Endpoint 1.
A (DMA) controller/pointer block, which is capable of handling aborts and retries, to handle data
movement from/to the status descriptor memory and the register file.
A parallel read/write interface to a customer’s microcontroller.
Optional control state machines to execute requests, respond to tokens, and handle errors if
customers choose not to use a microcontroller.
Repeater
The HR includes:
Repeater logic to manage connectivity on a per packet basis. It can handle any combination of full-
speed and low-speed devices at the downstream ports. It also supports exception handling, such as
fault recovery, suspend/resume as directed by the Host, and remote-wakeup and Frame timer
synchronization.
Four-port state machines which can interpret and respond to bus events, such as
connect/disconnect detection, port enable/disable, suspend/resume, reset, and power switching.
The power manager and central clocking circuitry.
Port State Machine
The port state machine logic can be implemented as an external port, or an internal port for communica-
tion with an embedded function. To expand the Hub Megamacro function, additional port state machine
functional blocks can be added.
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| W72217 | 制造商:DANAHER - INDUSTRIAL/SPECIALTY 功能描述:LS-800-4-SS-SS-SPDT-020-GR3-2, LEVEL SWITCH |
| W7224-D5 | 功能描述:插入式交流適配器 72 Watts 24V RoHS:否 制造商:Phihong 地區:Universal 安裝風格:Wall, Interchangeable Plug 輸入電壓范圍:90 VAC to 264 VAC 輸出端數量:1 輸出功率額定值:5 W 輸出電壓（通道 1）:5 V 輸出電流（通道 1）:1 A 直流輸出連接器:USB Type A 隨附/必需的交流插頭:Required 商用/醫用:Commercial 效率:Level V |
| W722LS | 制造商:LUMINIS 制造商全稱:LUMINIS 功能描述:Post top mount |
| W724 3/4B | 制造商:Thomas & Betts 功能描述:SOCKET CLAMP WASHER |
| W72-43 | 制造商:Olympic Controls Corporation 功能描述: |
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