The FE1.1 is a highly integrated, high quality, high performance, low power consumption, yet low cost solution for USB 2.0 High Speed 4-Port Hub. It adopts Multiple Transaction Translator (MTT) architecture to explore the maximum possible throughput. Six, instead of two, non-periodic transaction buffers are used to minimize potential traffic jamming. The whole design is based on statemachine-control to reduce the response delay time; no micro controller is used in this chip.(點擊即可咨詢芯片詳細信息)
FE1.1’s Features:
1.Fully compliant with Universal Serial Bus Specification Revision 2.0 (USB 2.0);
- Upstream facing port supports High- Speed (480MHz) and FullSpeed (12MHz) modes;
- 4 downstream facing ports support High-Speed (480MHz), Full-Speed (12MHz), and Low-Speed (1.5MHz) modes;
2. Integrated USB 2.0 Transceivers;
3. Integrated upstream 1.5KΩ pull-up, downstream 15KΩ pull-down, and serial resisters;
4. Integrated 5V to 3.3V and 1.8V regulator.
5. Integrated Power-On-Reset circuit;
6. Integrated 12MHz Oscillator with feedback resister, and crystal load capacitance;
7. Integrated 12MHz-to-480MHz Phase Lock Loop (PLL);
8. Multiple Transaction Translators (MTT) –
-One TT for each downstream port;
-Alternate Interface 0 for Single-TT, and Alternate Interface 1 for Multiple-TT;
-Each TT could handle 64 periodic Start Split transactions, 32 periodic Complete-Split transactions, and 6 none-periodic transactions;
9. Automatic self-power status monitoring;
-Automatic re-enumeration when SelfPowered switching to Bus-Powered;
10. Board configured options
- Ganged or Individual Power Control Mode select;
- Global or Individual Over-Current Detection Mode select;
- Removable or Non-Removable Downstream Devices configuration;
11. Comprehensive Port Indicators support:
- Standard downstream port status indicators (Green and Amber LED control for each downstream port);
-Hub active LED support
FE1.1’s Block Diagram
FE1.1’s Package
FE1.1’s Ordering Information
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