Maxtor 5T010H1 User Manual download pdf (Page 41)

HOST SOFTWARE INTERFACE

6 – 6

Reset and Interrupt HandlingReset and Interrupt Handling

Reset and Interrupt Handling

Reset HandlingReset Handling

Reset Handling

One of three different conditions may cause a reset: power on, hardware reset or software reset. All three

cause the interface processor to initialize itself and the Task File registers of the interface. A reset also causes a

set of the Busy bit in the Status register. The Busy bit does not clear until the reset clears and the drive

completes initialization. Completion of a reset operation does not generate a host interrupt.

Task File registers are initialized as follows:

Error 1

Sector Count 1

Sector Number 1

Cylinder Low 0

Cylinder High 0

Drive/Head 0

Interrupt HandlingInterrupt Handling

Interrupt Handling

The drive requests data transfers to and from the host by asserting its IRQ 14 signal. This signal interrupts the

host if enabled by bit 1 (IRQ enable) of the Fixed Disk Control register.

Clear this interrupt by reading the Status register, writing the Command register, or by executing a host

hardware or software reset.

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Maxtor 5T010H1 User Manual Page 41