6 hot plug – FUJITSU MHV2060BH User Manual

Page 89

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5.1 Physical Interface

C141-E224

5-13

5.1.6 Hot Plug

The disk drive is “Hot Plug Capable” which is based on Serial ATA II Extension
to Serial ATA 1.0a Specification.

It is recommended to use the pre-charge resistor for protection from over current
at +5V power supply circuit in the host system when the disk drive is hot-
plugged.
(Refer to the Serial ATA II Extension to Serial ATA 1.0a Specification.)

The equivalent circuit of +5V power supply at Hot Plugging in the following
figure.

It is necessary to choose pre-charge resistor R

L

value, which is in permissible

range of +5V power supply specification at the host system.

Refer to the equivalent circuit when the optimized value of pre-charge resistor R

L

.

It is recommended to choose the minimum value which is in permissible range of
+5V power supply specification at the host system. Because it is possible that
rush current occurs again when P8, P9 pin connection after P7 (+5V pre-charge
pin) connection dependent on the insertion speed.

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