Fujitsu MCF3064AP Manual Do Utilizador

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C156-E142-02EN

There are four types of resets.

!  Power-on reset

!  The ODD performs initialization such as initial diagnostics and default setting.  If any

media is mounted, it also spins up media.

!  Hardware reset

!  The ODD is reset when the RESET- signal is asserted.  The ODD initializes the interface

controller by setting default values.

!  ATA reset (Software reset)

!  The ODD is reset when the SRST bit of the Device Control register is set.

!  The device driver should not use the SRST bit to reset the ODD (except for restore from

sleep mode).

!  After ATA reset, the ODD initializes the task file as shown below.

Status = X'00'
Error = (Depending on the SRST sequence)
Sector Count = X'01'
Sector number = X'01'
Cylinder Low = X'14'
Cylinder High = X'EB'
Drive/Head = X'00'

!  RDBY is set to 1 with the first command after ATA reset.

!  If ATA reset is issued while the ODD is selected and a command is being executed (BSY

= 1 or DRQ = 1), the command is interrupted.  Otherwise, the ODD continues command
processing.

!  The contents set with the MODE SELECT and Set Features commands remain

unchanged.

!  ATAPI reset

!  The ODD is reset with a DEVICE RESET command.  The ODD interrupts the current

command.