Abstract: A boundary configuration (Common Input/output CIO) for Generalized Scan Designs (GSD) in a single clock chip design includes at least one generalized scan design internal latch; a boundary scan clock input to the internal latch; an input/output cell connected to the internal latch; and at least one control line between the internal latch and the input/output cell. The CIO GSD is arranged and configured to operate in various modes including a function mode, a RUNBIST/INTEST/LBIST mode, an EXTEST/WIRETEST mode, a SAMPLE/PRELOAD mode, etc. In a different version, a MUX controller is connected to the internal latch. The MUX controller selects data from one of at least two control lines and sending the selected data to at least one internal logic unit of the chip for a test operation.
Type:
Grant
Filed:
September 2, 1998
Date of Patent:
February 27, 2001
Assignee:
International Business Machines Corporation
Inventors:
Steven Michael Douskey, Paul Allen Ganfield, Daniel Guy Young
Abstract: A multiple frequency zoned disk storage device in which data is read from and/or written to the disk at two or more discrete disk velocities is disclosed. The disk storage device includes a low power mode where information is read/written from/to the disk while the disk velocity is reduced to conserve power. The allocation track locations into zones on the drive reduces the number of zone bit frequencies the storage device must handle.
Type:
Grant
Filed:
April 1, 1996
Date of Patent:
July 28, 1998
Assignee:
International Business Machines Corporation