Ampro Corporation Littleboard 550 manual IDSEL2, IDSEL3, GNT0, CLK1, Rst, Intc

Chapter 3				Hardware
	Pin #	Signal	Input/	Description
			Output
	103 (D13)	+3.3V		+3.3 volts ±5% power supply
	104 (D14)	C/BE2*		PCI Bus Command/Byte Enable 2 – Refer to Pin 4 for more
				information.
	105 (D15)	GND		Ground
	106 (D16)	AD19	T/S	PCI Address and Data Bus Line 19 – Refer to Pin 3 for more
				information.
	107 (D17)	+3.3V		+3.3 volts ±5% power supply
	108 (D18)	IDSEL2		Initialization Device Select 2 – Refer to Pin 18 for more
				information.
	109 (D19)	IDSEL3		Initialization Device Select 3 – Refer to Pin 18 for more
				information.
	110 (D20)	GND		Ground
	111 (D21)	AD27	T/S	PCI Address and Data Bus Line 27 – Refer to Pin 3 for more
				information.
	112 (D22)	AD31	T/S	PCI Address and Data Bus Line 31 – Refer to Pin 3 for more
				information.
	113 (D23)	VI/O		+5 volts ±5% power supply
	114 (D24)	GNT0*	T/S	Grant 0 – Refer to Pin 25 for more information.
	115 (D25)	GND		Ground
	116 (D26)	CLK1	In	PCI clock 1 – Refer to Pin 27 for more information
	117 (D27)	GND		Ground
	118 (D28)	RST*	In	PCI bus reset – This signal is an output signal to reset the entire
				PCI Bus. This signal will be asserted during system reset
	119 (D29)	INTC*	O/D	Interrupt C – This signal is used to request interrupts only for multi-
				function devices.
	120 (D30)	GND		Ground

Notes: The shaded area denotes power or ground. The signals marked with * = Negative true logic.

The Input/Output signals in this table refer to the input/output signals listed in the PCI Local Bus Manual, Revision 2.2, Chapter 2, paragraph 2.1, Signal definitions. The following terms or acronyms are used in this table:

•In – Input is standard input only signal

•Out – Totem Pole output is a standard active driver

•T/S – Tri-State is a bi-directional input output pin

•S/T/S – Sustained Tri-State is an active low tri-state signal driven by one and only one agent at a time

•O/D – Open Drain allows multiple devices to share as a wire-OR.

LittleBoard 550 Reference Manual 29