Samsung spinpoint v40 manual PIO Data Out Commands, PIO Read Command, PIO Read Aborted Command

DISK DRIVE OPERATION

6.6.1.1PIO Read Command

a)b) Setup Issue

Command

BSY=0

DRDY=1

	e)
	Read	Transfer
BSY=1	Status	Data
	BSY=0
	DRQ=1
	Assert	Negate
	INTRQ	INTRQ

=====

BSY=1

DRQ=0

e)

Read	Transfer
Status	Data
BSY=0
DRQ=1
Assert	Negate
INTRQ	INTRQ

BSY=1

DRQ=0

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.

6.6.1.2PIO Read Aborted Command

a)b) Setup Issue

Command

BSY=0

DRDY=1

e)

Read

Status

BSY=1 BSY=0

DRQ=1

Assert

INTRQ

DRQ=0 Negate

INTRQ

Although DRQ=1, there is no data to be transferred under this condition.

6.6.2PIO 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)

84 SpinPoint V40 Product Manual