FE1.1 — USB 2.0 4-Port MTT Hub Controller
Overview
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.
Advanced MTT Architecture
The chip adopts Multiple Transaction Translator (MTT) architecture to explore the maximum possible throughput. Six non-periodic transaction buffers are used to minimize potential traffic jamming. The whole design is based on state-machine-control to reduce the response delay time; no micro controller is used in this chip
The whole chip is covered by Test Scan Chain – even on high-speed (480MHz) modules.
Low Power Consumption
Achieved by using 0.18μm technology and comprehensive power/clock control. Most part of the chip will not be clocked unless needed.
Product Specifications
| Package | Port Count | Body Size | Temperature Grade | Transaction Translator |
|---|---|---|---|---|
| LQFP-48 | 4 | 7x7 mm | Commercial Grade[1], Extended Temperature Grade[2] |
Multiple |
| QFN-24 | 4 | 4x4 mm | Commercial Grade[1], Extended Temperature Grade[2] |
Multiple |
| QFN-48 | 4 | 6x6 mm | Commercial Grade[1] | Multiple |
Features
- Fully compliant with Universal Serial Bus Specification Revision 2.0 (USB 2.0)
- Upstream Facing Port supports High-Speed (480MHz) and Full-Speed (12MHz) modes
- 4 Downstream Facing Ports support High-Speed (480MHz), Full-Speed (12MHz), and Low-Speed (1.5MHz) modes
- Integrated USB 2.0 Transceivers
- Integrated upstream 1.5KΩ pull-up, downstream 15KΩ pull-down, and serial resistors
- Integrated 5V to 3.3V and 1.8V regulators
- Integrated Power-On-Reset circuit
- Integrated 12MHz Oscillator with feedback resistor, and crystal load
- Integrated 12MHz-to-480MHz Phase Lock Loop (PLL)
- Comprehensive Port Indicators support (Green and Amber LED)
- 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 non-periodic transactions
- Automatic self-power status monitoring
- Automatic re-enumeration when Self-Powered switching to Bus-Powered
- Board configuration options
- Ganged or Individual Power Control Mode select
- Global or Individual Over-Current Detection Mode select
- Removable or Non-Removable Downstream Devices configuration