Back to results
US 2001/0024338 A1Published application
Method and device for entering test mode in an integrated circuit for use in floppy disk drive, and a floppy disk drive apparatus incorporating the method
AssigneeAlps Electric Co., Ltd.
InventorMunehisa Haitani
Life of this patent
Estimating the term…
Abstract
A method and a device enters a test mode in a floppy disk drive integrated circuit. The method and device includes a monitoring circuit and an integrated circuit having a selecting circuit. The selecting circuit selects a test-mode when a test mode command is received and a steady state voltage level is reached in a predetermined time period.
Claims9
A method for entering a test mode in a circuit that is a unitary part of a disk drive, comprising:
- supplying voltage to a disk drive;
- monitoring the voltage until a steady state voltage is reached;
- monitoring an input of a test mode circuit for a test-mode command;
- initiating a test mode in the disk drive when the test-mode command is detected and the steady state voltage level is reached in a predetermined time period.
1 more element
A device for initiating a test mode in a disk drive, comprising:
- a monitoring circuit configured to identify a steady state voltage level;
- a selecting circuit configured to select a test mode when a test mode command is detected in a predetermined time period and the monitoring circuit identifies the steady state voltage level in the predetermined time period;
- and
- a control circuit interfaced to the selecting circuit and the disk drive, the control circuit being configured to initiate a test-mode when the selecting circuit selects the test mode.
1 more element
A disk drive, comprising:
- a monitoring circuit configured to monitor an input voltage and detect a steady state voltage level;
- a disk drive circuit interfaced to the monitoring circuit, the disk drive circuit being configured to initiate a test-mode in a timed period when the steady state voltage level is reached and the disk drive circuit receives a test-mode command;
- a motor interfaced to the disk drive circuit;
- and
- a head configured to read data from and write data to a media driven by the motor.
2 more elements
Dependencies are inferred from the claim text.