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 11th pin at the power supply segment on the interface connector.
a) P11
→
Grounded (0.8 V or less): Staggered Mode Disable
The disk drive spins up at power on.
b) 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 until after
successful Phy initialization 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
V
ACT
≤
0.7V
≥
0.7V
I
ACT
- +50uA
Summary of Contents for MHV2040BH
Page 1: ...C141 E224 02EN MHV2120BH MHV2100BH MHV2080BH MHV2060BH MHV2040BH DISK DRIVES PRODUCT MANUAL ...
Page 4: ...This page is intentionally left blank ...
Page 8: ...This page is intentionally left blank ...
Page 10: ...This page is intentionally left blank ...
Page 12: ...This page is intentionally left blank ...
Page 42: ...This page is intentionally left blank ...
Page 54: ...This page is intentionally left blank ...
Page 74: ...This page is intentionally left blank ...
Page 86: ...Interface 5 12 C141 E224 Figure 5 2 Example of the circuit for driving Ready LED ...
Page 236: ...This page is intentionally left blank ...
Page 258: ...This page is intentionally left blank ...
Page 262: ...This page is intentionally left blank ...
Page 264: ...This page is intentionally left blank ...
Page 272: ...This page is intentionally left blank ...
Page 274: ......
Page 275: ......
Page 276: ......