UNIVERSAL SERIAL BUS DEVICE AND METHOD FOR POWER MANAGEMENT
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United States of America Patent
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Issued Date -
Jun 6, 2013
app pub date -
Feb 3, 2012
filing date -
Dec 5, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention discloses a Universal Serial Bus (“USB”) device with a power saving mechanism. The USB device includes an Ethernet physical layer, a USB physical layer, a wakeup packet detection circuit configured to receive a wakeup packet from the Ethernet physical layer, and a standby power saving control circuit. The standby power saving control circuits selects a connection speed from the group including EEE, 10 Mbps, 100 Mbps, 1 Gbps and 10 Gbps, wherein the standby power saving control circuit is able to connect to a wakeup device at the selected connection speed, so that the USB system can enter an optimal power saving status while in a standby mode. The connection speeds are defined in the specification of IEEE 802.3az as 10BASE-T, 100BASE-TX, 1000BASE-T, 10GBASE-T, 1000BASE-KX, 10GBASE-KX4, 10GBASE-KR.
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