Mixed-signal single-chip integrated system electronics for data storage devices

A data storage device comprising:

• one or more media surfaces;
• a number of at least read devices corresponding to the one or more media surfaces;
• a spindle motor for moving the one or more media surfaces;
• an actuator for moving the at least read devices relative to the media surfaces;
• a read device preamplifier, coupled to the number of at least read devices;
• a servo control coupled to the actuator, for driving the actuator in response to control signals;
• and
• an integrated data storage device controller integrated circuit comprising:
• at least one internal communications and control bus, for transferring stored data and control data to and from elements within the integrated data storage device controller and with a host interface to transfer stored data and control data to and from the integrated data storage device controller;
• a read device data processor, coupled to the read device preamplifier and the at least one internal communications and control bus, for receiving and processing read device data from the read device preamplifier;
• a motion control servo logic, coupled to the servo control, for generating control signals for driving the servo control;
• a disc controller, coupled to the at least one internal communications bus, for transferring stored data to the host interface;
• and
• a microcontroller, coupled to the at least one internal communications bus, for generating control data to control devices within the integrated data storage device controller integrated circuit.

In a data storage device having one or more media surfaces, a corresponding number of at least read devices, a spindle motor for moving the one or more media surfaces, an actuator for moving the at least read devices relative to the media surfaces, a read device preamplifier, coupled to the number of at least read devices, a servo control coupled to the actuator, for driving the actuator in response to control signals, an integrated data storage device controller integrated circuit comprising at least one internal communications and control bus, for transferring stored data and control data to and from elements within the integrated data storage device controller and interconnected with a host interface to transfer stored data and control data to and from the integrated data storage device controller, a read device data processor, coupled to the read device preamplifier and the at least one internal communications and control bus, for receiving and processing read device data from the read device preamplifier, a motion control servo logic, coupled to the servo control, for generating control signals for driving the servo control, a disc controller, coupled to the at least one internal communications bus, for transferring stored data to the host interface, and a microcontroller, coupled to the at least one internal communications bus, for generating control data to control devices within the integrated data storage device controller integrated circuit, a method of testing the integrated circuit data storage device controller, comprising the step of:

• selectively multiplexing outputs of one or more of the disc controller, the microprocessor, and the read device data processor with one or more I/O pins such that the integrated circuit may selectively output signals from one or more of the of the disc controller, the microprocessor, read device data processor.

In a tape drive having one or more media surfaces, a corresponding number of at least read devices, a spindle motor for moving the one or more media surfaces, a read device preamplifier, coupled to the number of at least read devices, a servo control coupled to the spindle motor for driving the spindle motor in response to control signals, an integrated tape drive controller integrated circuit comprising:

• a host interface for interfacing with a host computer;
• at least one internal communications and control bus, for transferring stored data and control data to and from elements within the integrated tape drive controller and interconnected with the host interface to transfer stored data and control data to and from the integrated tape drive controller;
• a read device data processor, coupled to the read device preamplifier and the at least one internal communications and control bus, for receiving and processing read device data from the read device preamplifier;
• a motion control servo logic, coupled to the at least one internal communications and control bus, and to the servo control, for generating control signals for driving the servo control;
• a disc controller, coupled to the at least one internal communications bus, for transferring stored data to the host interface;
• and
• a microcontroller, coupled to the at least one internal communications bus, for generating control data to control devices within the integrated tape drive controller integrated circuit.

In a hard disk drive having one or more disk surfaces, a corresponding number of read/write heads, a spindle motor for rotating the disk surfaces, a voice coil motor for moving the heads relative to the disk surfaces, a head preamplifier, coupled to the number of read/write heads, a servo control coupled to the voice coil motor for driving the voice coil motor in response to control signals, an integrated hard disk drive controller integrated circuit comprising at least one internal communications and control bus, for transferring stored data and control data to and from elements within the integrated hard disk drive controller and interconnected with a host interface to transfer stored data and control data to and from the integrated hard disk drive controller, at least one of a read channel controller and a read/write channel controller, coupled to the head preamplifier and the at least one internal communications and control bus, for receiving and processing read channel data from the head preamplifier, a motion control servo logic, coupled to the servo control, for generating control signals for driving the servo control, a disk controller, coupled to the at least one internal communications bus, for transferring stored data to the host interface, and

• a microcontroller, coupled to the at least one internal communications bus, for generating control data to control devices within the integrated hard disk drive controller integrated circuit, a method of testing the integrated circuit hard disk drive controller, comprising the step of:
• selectively multiplexing outputs of one or more of the disk controller, the microprocessor, and the at least one of a read channel controller and a read/write channel controller with one or more I/O pins such that the integrated circuit may selectively output signals from one or more of the of the disk controller, the microprocessor, and the at least one of a read channel controller and a read/write channel controller.