Network transceiver having circuitry for referencing transmit data to a selected input clock
AssigneeAdvanced Micro Devices, Inc.
InventorsMichael Richard Bray, Qing He
Life of this patent
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Abstract
A novel system for selectively referencing transmit data transferred from a repeater to a physical layer transmitter via a Media Independent Interface (MII), to an input clock selected depending on a mode of MII operations. A clock select input determines whether transmit data is referenced to a selected input clock or to a MII transmit clock output. An analog phase-locked loop (APLL) is supplied with the selected input clock to produce a signal for driving a wave shaper that converts the MII transmit data into a required format for 10 Mb/s operations.
Claims20
A network transceiver for transferring network signals between a repeater and a link partner provided on a network medium, the transceiver comprising:
- a physical layer device,
- an interface for transferring transmit data from the repeater to the physical layer device,
- a first clock input for providing a first reference clock signal,
- a second clock input for providing a second reference clock signal, and
- a transmit data referencing circuit for selectively applying the first or the second reference clock signal as a timing reference for transfer of the transmit data.
In an Ethernet network, a method of transferring network data between a repeater and a link partner provided on a network medium, comprising the steps of:
- arranging a media independent interface (MII) for transferring transmit data from the repeater to a physical layer device,
- supplying the physical layer device with first and second input clock signals for respectively providing first and second reference clock signals, and
- selectively applying the first or the second reference clock signal as a timing reference for transfer of the transmit data.
Dependencies are inferred from the claim text.