简介： USB 2.0 MTT Hub Fully compliant with Universal Serial Bus Specification Revision 2.0 Supports USB HS (480Mbps), FS(12Mbps) and LS (1.5Mbps) modes Three downstream ports and one upstream port with integrated USB 2.0 transceivers Multiple Transaction Translator (MTT) provides respective TT control logics for each downstream port Supports one suspend LED indicator and three downstream port status LED indicator On-chip 8-bit micro-processor (6 MIPS @12MHz) with 64-byte RAM and 2K internal ROM Built-in upstream port 1.5KΩ pull-up and downstream port 15KΩ pull-down resistors Supports both individual and gang modes of power management and over-current detection for downstream ports Supports compound-device (non-removable in downstream ports) by I/O pin configuration Improves output drivers with slew-rate control for EMI reduction Internal power-fail detection for ESD recovery 10/100M Fast Ethernet Controller Integrates 10/100Mbps Fast Ethernet MAC/PHY IEEE 802.3 10Base-T/100Base-TX compatible Supports twisted pair crossover detection and auto-correction (HP Auto-MDIX) Embedded 16KB SRAM for RX packet buffering and 8KB SRAM for TX packet buffering Supports both Full-duplex with flow control and Half-duplex with backpressure operation Supports 2 VLAN ID filtering, received VLAN Tag (4 bytes) can be stripped off or preserved MAC/PHY loop-back diagnostic capability Support Wake-on-LAN Function Supports Suspend mode and Remote Wakeup via Link-up, Magic packet, MS wakeup frame and external pin Optional PHY power down during Suspend mode High performance packet transfer rate over USB bus using proprietary burst transfer mechanism (US Patent Approval) Supports USB to Ethernet bridging or vice versa in hardware Supports 256/512 bytes (93c56/93c66) of serial EEPROM (for storing USB Descriptors for USB to LAN function) Supports automatic loading of Ethernet ID, USB Descriptors and Adapter Configuration from EEPROM after power-on initialization Integrates on-chip voltage regulator and only requires a single 3.3V power supply 12MHz and 25Mhz clock input from either crystal or oscillator source Integrates on-chip power-on reset circuit Package type with 100-pin LQFP RoHS compliant package Operating temperature range: 0°C to 70°C