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DISK DRIVE OPERATION
SpinPoint V40 Product Manual
84
6.6.1.1 PIO Read Command
a) b) e) e)
Setup Issue Read Transfer Read Transfer
Command Status Data ===== Status Data
BSY=0 BSY=1 BSY=0 BSY=1 BSY=0 BSY=1
DRDY=1
DRQ=1
DRQ=0
DRQ=1
DRQ=0
Assert Negate Assert Negate
INTRQ INTRQ INTRQ INTRQ
If Error Status is presented, the drive is prepared to transfer data, and it is at the host's discretion that the data
is transferred.
6.6.1.2 PIO Read Aborted Command
a) b) e)
Setup Issue Read
Command Status
BSY=0 BSY=1 BSY=0
DRDY=1
DRQ=1
DRQ=0
Assert Negate
INTRQ INTRQ
Although DRQ=1, there is no data to be transferred under this condition.
6.6.2 PIO Data Out Commands
This class includes:
• Download Microcode (92h)
• Format (50h)
• SMART Write Log Sector
• Write Buffer (E8h)
• Write Long (32h)
• Write Multiple (C5h)
• Write Sector(s) (30h)