Computer Drive - Floppy Disk Drive User Manual

Interface

5-48 C141-E224

(13) IDLE (X’97’ or X’E3’)

Upon receipt of this command, the device enters the idle mode. The device report

the status even if the device has not fully entered the idle mode. If the spindle of

the device is already rotating, the spin-up sequence shall not be implemented.

By using this command, the APS (Automatic Power Standby) timer function is

enabled and the timer immediately starts the countdown. When the timer reaches

the specified value, the device enters standby mode. The APS timer is set to

prohibition if the Sector Count field's value was "0" when device has received this

command.

The period of timer count is set depending on the value of the Sector Count

Sector Count field value Point of timer

0 [X’00’] Timeout disabled

1 to 240 [X’01’ to X’F0’]

(Value × 5) seconds

241 to 251 [X’F1’ to X’FB’]

((Value-240) × 30) min

252 [X’FC’] 21 minutes

253 [X’FD’] 8 hrs

254 to 255 [X’FE’ to X’FF’] 21 minutes 15 seconds

• Error reporting conditions

(1) A SATA communication error occurred (ST = 51h, ER = 14h).

At command issuance (Shadow Block Registers setting contents)

CM X’97’ or X’E3’

DH x x x x xx

Period of timer