Ampro Corporation P5X manual DC Power, Power Requirements, Pin Signal Name Function

DC Power

The power connector J10 is a 7-pin polarized connector. Refer to Table 2– 3 for power connections and Table 2– 4 for mating connector information.

Caution

Be sure the power plug is wired correctly before applying power to the board! See Table 2– 3.

Table 2– 3. Power Connector (J10)

Pin	Signal Name		Function
1, 7	+5VDC		+5VDC ±5% input
2, 3, 6	Ground		Ground return
4	+12VDC		+12VDC ±5% input
5	+3.3VDC		+3.3V ±5% input
		(Only required for some PCI expansion boards)
	Table 2– 4. J10 Mating Connector
	Connector Type		Mating Connector
	DISCRETE WIRE		MOLEX HOUSING 09-50-8073
			Pins 08-52-0071

Power Requirements

The Little Board/P5x requires only +5VDC (±5%) for operation. The voltage required for the RS-232 ports is generated on-board from the +5VDC supply. An on-board +5V to +12V converter supplies power for programming the BIOS Flash EPROM. An on-board low-voltage power supply circuit provides power to low-voltage CPUs and certain other on-board components. An optional Vee power supply can be attached to supply Vee power to an LCD flat panel.

The exact power requirement of the Little Board/P5x system depends on several factors, including the installed memory devices, SCSI bus termination, CPU speed, the peripheral connections, and which, if any, MiniModule products or other expansion boards are attached. For example, the keyboard draws its power from the board, and there can be some loading from the serial, parallel, and other peripheral ports. Consult the specifications in Chapter 3 for the basic power requirements of your model.

Other Voltages

There may be a requirement for an external +12 volt supply, depending on what peripherals you connect to the Little Board system. For instance, +12V is required for most flat-panel backlight power supplies. You can connect a +12V supply to the Little Board module through the power

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