FUJITSU MHV2060BH - Manual (Page 87)

5.1 Physical Interface
C141-E224 5-11
5.1.5 P11 function
The disk drive supports the following functions when P11 pin in the power supply
segment of interface connector is used as an input or output pin.
P11 pin supports the functions as follows:
• Staggered Spin-up: Use P11 as an input pin
• Driving Ready LED: Use P11 as an output pin
The following is P11 setting and hardware requirement for these functions
5.1.5.1 Staggered Spin-up
It is able to set whether the disk drive spins up at power on or not, by input
voltage level of 11
th pin at the power supply segment on the interface connector.
a) P11
→ Open (no connection):
Staggered Mode Disable
The disk drive spins up at power on.
(Default setting)
b) P11
→ Grounded (0.8 V or less): (The same behavior as a) )
c) P11
→ “High” level (The P11 line in the host system is pulled up by
resistor [recommended value: 1 to 5.1 k
Ω] to power supply in the
host system [Recommended voltage: 2V (3.3V or less)]:
Staggered Mode Enable
The drive does not spin up at power on.
5.1.5.2 Driving Ready LED
It is possible that the disk drive is able to drive P11 pin as output for indication of
Ready LED.
a) P11 output level
→ “Low”: Ready indication (LED is on)
b) P11 output level
→ “High”: Not Ready indication (LED is off)
It is necessary to meet the requirements for P11 as output pin in case of driving
Ready LED.
Table 5.3 Requirements for P11 as an output pin.
Asserted Deasserted
VACT
≤ 0.7V ≥ 0.7V
IACT - +50uA