| US 7,516,340 B2 | ||
| Powered device including a classification signature resistor | ||
| D. Matthew Landry, Austin, Tex. (US); and Russell J. Apfel, Austin, Tex. (US) | ||
| Assigned to Silicon Laboratories, Inc., Austin, Tex. (US) | ||
| Filed on Jun. 30, 2006, as Appl. No. 11/479,956. | ||
| Prior Publication US 2008/0005598 A1, Jan. 03, 2008 | ||
| Int. Cl. G06F 1/00 (2006.01) | ||
| U.S. Cl. 713—300 [713/310; 713/320; 713/321; 713/322; 713/323; 713/324; 713/330; 713/340; 323/316] | 20 Claims |
| 1. A method comprising:
receiving a classification voltage at a powered device from a powered network;
providing a classification signature to the powered network in response to receiving the classification voltage to specify
a power requirement of the powered device;
deriving a reference current within the powered device from the classification signature; and
adjusting a current limit as a function of the reference current.
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