Patent ID: 6127794
Filing Date: 2000-10-03
Classification: G11B

Abstract:
A semiconductor integrated circuit device for driving a magnetic recording/reproducing apparatus, comprising:a control circuit for producing a drive clock for driving a spindle motor;a clock output terminal for feeding out the drive clock produced by the control circuit;a control terminal for feeding out a spindle motor on/off control signal produced by the control circuit; anda test signal holding circuit for holding temporarily a test signal that is fed in via the clock output terminal to start testing of individual circuits provided within the semiconductor integrated circuit device,wherein, within a period after electric power starts being supplied to the semiconductor integrated circuit device until the spindle motor on/off control signal starts being fed out as a signal for driving the spindle motor via the control terminal, the test signal fed in via the clock output terminal is temporarily held by the test signal holding circuit and is then fed to the control circuit so that the control circuit, recognizing the test signal, will conduct testing of the individual circuits provided within the semiconductor integrated circuit device and then output test results.