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FUJITSU DISK DRIVES MHM215OAT User Manual

Page 136

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5.3 Host Commands

C141-E104-02EN

5-59

At command completion (I/O registers contents to be read)

1F7

H

(ST)

Status information

1F6

H

(DH)

x

x

x

DV

xx

1F5

H

(CH)

1F4

H

(CL)

1F3

H

(SN)

1F2

H

(SC)

1F1

H

(ER)

xx

xx

xx

xx

Error information

(25) STANDBY (X’96’ or X’E2’)

Upon receipt of this command, the device sets the BSY bit of the Status register
and enters the standby mode. The device then clears the BSY bit and generates an
interrupt. The device generates an interrupt even if the device has not fully
entered the standby mode. If the device has already spun down, the spin-down
sequence is not implemented.

By using this command, the automatic power-down function is enabled and the
timer starts the countdown when the device returns to idle mode.

When the timer value reaches 0 (a specified time has padded), the device enters
standby mode.

Under the standby mode, the spindle motor is stopped. Thus, when the command
involving a seek such as the READ SECTOR(s) command is received, the device
processes the command after driving the spindle motor.

attention: The automatic power-down is executed if no command is coming for

30 min.

At command issuance (I/O registers setting contents)

1F7

H

(CM)

X’96’ or X’E2’

1F6

H

(DH)

x

x

x

DV

xx

1F5

H

(CH)

1F4

H

(CL)

1F3

H

(SN)

1F2

H

(SC)

1F1

H

(FR)

xx

xx

xx

Period of timer

xx

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