Patent ID: 7539784
Filing Date: 2009-05-26
Classification: G06F

Abstract:
1. A hard disk type detecting circuit for detecting a type of a hard disk plugged into a hard disk connecting port, wherein the hard disk type comprises a first type and a second type, the hard disk type detecting circuit at least comprising: a ground end; a power end for receiving reference power source; and a voltage divider comprising a first resistor and a second resistor, wherein one end of the first resistor is electrically connected to the power end and the other end of the first resistor is electrically connected with one end of the second resistor while the other end of the second resistor is electrically connected to the ground end, two paths are formed in the electrical connection point of the first and the second resistors, one path is used as a signal output end while the other path is electrically connected with an idle pin of the hard disk connecting port, when the hard disk is the first type hard disk, the idle pin of the hard disk connecting port has no electrical connection with the hard disk, accordingly the voltage divider allows the signal output end to output a high voltage level signal, when the hard disk is the second type hard disk, the idle pin of the hard disk connecting port forms an electrical connection with the hard disk, accordingly the voltage divider allows the signal output end to output a low voltage level signal, wherein the first type hard disk and the hard disk connecting port are of different types while the second type hard disk and the hard disk connecting port are of a same type, the first type hard disk is a SATA hard disk, the hard disk connecting port is a SAS hard disk connecting port, and the second type hard disk is a SAS hard disk.