Technical Information C20-SATA • SATA Dual-Drive Mezzanine Module
P2 External Power
The C20-SATA module will be normally supplied with +5V drive power across the J1 mezzanine
connector from the carrier side board. In turn, the side board +5V power is primarily derived from the
CPU base board sw5V power well, according to the current CPU sleep state.
With the optional connector P2, the systems power supply can be also permanently connected to the
C20-SATA transition module, as an alternative. The P2 connector is an AMP EI series 4-position
header, being very popular since it has been used also on 3.5-inch floppy disk drives. The current is
limited by a resettable fuse. P2 is a stuffing option. If populated, SATA power is not available across
J1 (in order to avoid backdriving).
P2 • External Power • 264.02.004.03 (AMP EI-Series 2.50mm pitch straight header)
1
+5V/1.5A
2
GND
3
GND
4
+12V/0.5A
As of current, 2.5-inch SATA drives r5V only (P2 pin 1). P2 pin 4 (+12V) can be left open. In
rare cases the external power source may d12V only. For this situation the C20-SATA can be
provided with an on-board DC/DC switched regulator, from +12V to +5V.
264.02.004.03
AMP 171825-
4
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