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LAN9514-JZX Datasheet(PDF) 7 Page - SMSC Corporation |
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LAN9514-JZX Datasheet(HTML) 7 Page - SMSC Corporation |
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7 / 52 page  USB 2.0 Hub and 10/100 Ethernet Controller Datasheet SMSC LAN9514/LAN9514i 7 Revision 1.2 (02-29-12) DATASHEET 1.1.2 USB Hub The integrated USB hub is fully compliant with the USB 2.0 Specification and will attach to a USB host as a Full-Speed Hub or as a Full-/High-Speed Hub. The hub supports Low-Speed, Full-Speed, and High-Speed (if operating as a High-Speed hub) downstream devices on all of the enabled downstream ports. A dedicated Transaction Translator (TT) is available for each downstream facing port. This architecture ensures maximum USB throughput for each connected device when operating with mixed-speed peripherals. The hub works with an external USB power distributed switch device to control VBUS switching to downstream ports, and to limit current and sense over-current conditions. All required resistors on the USB ports are integrated into the hub. This includes all series termination resistors on D+ and D- pins and all required pull-down and pull-up resistors on D+ and D- pins. The over-current sense inputs for the downstream facing ports have internal pull-up resistors. Four external ports are available for general USB device connectivity. 1.1.3 Ethernet Controller The 10/100 Ethernet controller provides an integrated Ethernet MAC and PHY which are fully IEEE 802.3 10BASE-T and 802.3u 100BASE-TX compliant. The 10/100 Ethernet controller also supports numerous power management wakeup features, including “Magic Packet”, “Wake on LAN” and “Link Status Change”. These wakeup events can be programmed to initiate a USB remote wakeup. The 10/100 Ethernet PHY integrates an IEEE 802.3 physical layer for twisted pair Ethernet applications. The PHY block includes support for auto-negotiation, full or half-duplex configuration, auto-polarity correction and Auto-MDIX. Minimal external components are required for the utilization of the integrated PHY. The Ethernet controller implements four USB endpoints: Control, Interrupt, Bulk-in, and Bulk-out. The Bulk-in and Bulk-out Endpoints allow for Ethernet reception and transmission respectively. Implementation of vendor-specific commands allows for efficient statistics gathering and access to the Ethernet controller’s system control and status registers. 1.1.4 EEPROM Controller The LAN9514/LAN9514i contains an EEPROM controller for connection to an external EEPROM. This allows for the automatic loading of static configuration data upon power-on reset, pin reset, or software reset. The EEPROM can be configured to load USB descriptors, USB device configuration, and the MAC address. 1.1.5 Peripherals The LAN9514/LAN9514i also contains a TAP controller, and provides three PHY LED indicators, as well as eight general purpose I/O pins. All GPIOs can serve as remote wakeup events when LAN9514/LAN9514i is in a suspended state. The integrated IEEE 1149.1 compliant TAP controller provides boundary scan via JTAG. |
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