LAN9514 datasheet(7/49 Pages) SMSC

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USB 2.0 Hub and 10/100 Ethernet Controller

Datasheet

SMSC LAN9514/LAN9514i

Revision 1.0 (11-24-09)

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.

1.1.6

Power Management

The LAN9514/LAN9514i features three variations of USB suspend: SUSPEND0, SUSPEND1, and

SUSPEND2. These modes allow the application to select the ideal balance of remote wakeup

functionality and power consumption.

SUSPEND0: Supports GPIO, “Wake On LAN”, and “Magic Packet” remote wakeup events. This

suspend state reduces power by stopping the clocks of the MAC and other internal modules.

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