Apple 250 manual Power Requirements, Startup Not Applicable Random Operation Idle Standby

C H A P T E R 2

Hardware Modifications

Power Requirements

Power drawn for the 200 MB hard disk must be less than or equal to values shown in Table 2-6 for each mode. All measurements are under nominal environmental and voltage conditions. The limits include 1000-ohm pull-up resistors on all signal lines.

Table 2-6Power requirements for the 200 MB hard disk drive

		Current (amps)		Power (watts)
Mode	Mean	Maximum	Mean	Maximum
Startup (1)	Not	1.30	Not	6.50
	applicable		applicable
Random	0.50	0.60	2.50	3.00
operation (2)
Idle	0.30	0.38	1.50	1.90
Standby	0.20	0.25	1.00	1.25

NOTE	1	Startup values are peak values during response time of Power On to
Power Ready.
NOTE	2	Random operation values are RMS values with a 40 percent random seek,

40 percent write/read (1write in 10 reads) and 20 percent idle mode.

14 200 MB Hard Disk Drive