Patent ID: 7461181

Claim:
In an enclosure containing a first device for storing data, a second device coupled to the first device through a serial bus for accessing the stored data, the stored data configuring the second device, and a port coupled to the second device via high speed lines and lower speed lines for communicating with the second device, a system for enabling data to be stored in the first device through the port, comprising: DC blocking capacitors inserted into the high speed lines; first one or more switches coupled to the lower speed lines and the serial bus for selectably connecting either the lower speed lines or the second device to the first device through the serial bus; and a voltage detection circuit coupled to at least one of the high speed lines and the first one or more switches for detecting a control voltage on the high speed lines that exceeds a normal signaling voltage and configuring the first one or more switches to connect the lower speed lines to the first device to enable data to be applied at the port and stored in the first device.