Various Processes; Reset Response - Fujitsu MCM3064AP Product Manual

4.4 Various Processes

4.4.1 Reset response

There are four types of resets.
Power-on reset
Hardware reset
ATA software reset
ATAPI reset
C156-E227-01EN
The ODD performs initialization such as initial diagnostics and default
setting. If any media is mounted, it also spins up media.
The ODD is reset when the RESET- signal is asserted. The ODD
initializes the interface controller by setting default values.
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 software reset, the ODD initializes the task file as shown
below.
Status = 00h
Error = (Depending on the SRST sequence)
Sector Count = 01h
Sector number = 01h
Cylinder Low = 14h
Cylinder High = EBh
Drive/Head = 00h
DRDY is set to 1 with the first command after ATA reset.
If ATA software 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.
The ODD is reset with a DEVICE RESET command. The ODD
interrupts the current command.
4.4 Various Processes
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