Intel MAT-880 user manual JP4 Clear Cmos Contents, JP8 COM1 RS232 +5V / +12V Power Setting

INSTALLATIONS

JP4: Clear CMOS Contents

Use JP4 to clear the CMOS contents. Note that the ATX-power connector should be disconnected from the board before clearing CMOS.

JP4

Setting

Function

Pin 1-2	Normal
Short/Closed
Pin 2-3	Clear CMOS
Short/Closed

JP5, JP6, JP7: RS232/422/485 (COM2) Selection COM1, COM3, and COM4 are fixed for RS-232 use only. COM2 is selectable for RS232, RS-422 and RS-485.

The following table describes the jumper settings for COM2 selection.

		COM2		RS-232		RS-422			RS-485
		Function
					JP7:	JP7:			JP7:
		Jumper	1-2			3-4	5-6
		Setting			JP5:	JP5:			JP5:
		(pin closed)	3-5 & 4-6			1-3 & 2-4	1-3 & 2-4
					JP6:	JP6:			JP6:
			3-5 & 4-6			1-3 & 2-4	1-3 & 2-4
JP8: COM1 RS232 +5V / +12V Power Setting
	Pin #	Signal Name			JP8	Signal Name			Pin #
	1	RI				+12V		2
	3	RI (default)				RI (default)		4
	5	RI				+5V		6

COM1 Settings: Pin 1-2 short = +12V, Pin 5-6 short = +5V, Pin 3-4 short = standard COM port

MAT-880 User’s Manual 11