Seagate Medalist 1640, Руководство по эксплуатации продукта

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Data transfer mechanism Transfer types value
Mechanism name
Mode
value
Data
Upper 5 bits
Lower 3 bits
PIO Transfer Mode (default:
Set PIO Mode = 2)
2 00000 000
PIO Transfer Mode:
Set PIO Mode = 2
2 00000 001
PIO Flow Control Transfer
Mode: Set PIO Mode = 0
0 00001 000
PIO Flow Control Transfer
Mode: Set PIO Mode = 1
1 00001 001
PIO Flow Control Transfer
Mode: Set PIO Mode = 2
2 00001 010
PIO Flow Control Transfer
Mode: Set PIO Mode = 3
3 00001 011
PIO Flow Control Transfer
Mode: Set PIO Mode = 4
4 00001 100
Multiword DMA Mode 0 00100 000
Multiword DMA Mode 1 00100 001
Multiword DMA Mode 2 00100 010
Reserved ---- 01000 nnn
3.2.3 Idle and Set Idle Timer (FA
H
)
This is a Seagate-unique power command. It moves the drive immedi-
ately to Idle mode. When the drive receives this command, it asserts
Busy in the Host Status register, initiates entry into Idle mode, negates
Busy and generates an interrupt. If the drive is in Standby mode, it spins
up to enter Idle mode but does not wait for the spinup to complete before
issuing the interrupt.
The command also allows the host to set a timer, the Idle timer, that
causes the drive to move to Idle mode if no drive activity occurs within
the allotted time. The timer is set using the Sector Count register. The
register values correspond to 100-msec increments with a maximum
programmable time of 25.5 seconds. A zero value in the Sector Count
register disables the timer. If this value is set, the Idle timer is enabled
Medalist 1640 and 2140 Product Manual, January 1996 33