Voltage Tolerance; Input Noise - Seagate Decathlon 850 Product Manual

Decathlon 850 ATA Product Manual, July 1995
• Spinup. Spinup mode is entered from the Standby mode. The drive
brings the spindle and discs up to operating speed. Power in this mode
is defined as the peak power after starting spinup.
• Seeking. Seek mode is entered from Idle mode. The read/write heads
are moved to a specific location on the disc surface in preparation for
reading from or writing to the disc. Read/write electronics are powered
down but servo electronics are active. Typical power is defined as the
power average of executing random seeks with a 2-revolution (22.3
msec) dwell between Seek commands.
• Read/write. Read/write mode is entered from Idle mode. Read/write
electronics are activated and the servo is on track. The drive reads
from or writes to the disc.
1.9.1.2 Idle mode
The motor is up to speed, the servo electronics are inactive and the
heads are in the landing zone.
1.9.1.3 Standby mode
The spindle is stopped, the heads are parked in the landing zone, the
actuator is latched and some of the drive electronics are powered down.

1.9.2 Voltage tolerance

Voltage tolerance
(including noise)

1.9.3 Input noise

Input noise frequency
(max)
Input noise
(max, peak-to-peak)
+5V +12V
± 5% ± 5%
+5V +12V
25 MHz 25 MHz
100 mV 240 mV
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