Intel IXP46X, IXP45X manual

Intel® IXP45X and Intel® IXP46X Product Line of Network Processors—General Hardware Design Considerations

Table 21.	PCI Host/Option Interface Pin Description (Sheet 2 of 3)
		Host		Option
Name		Input	Device-Pin Connection	Input	Description
		Outpu		Outpu
		t		t
			Connect signal to same pin between
PCI_TRDY_N		I/O	the two devices.	I/O	PCI Target Ready
			Connect a 10-KΩpull-up resistor.
			Connect signal to same pin between
PCI_IRDY_N		I/O	the two devices.	I/O	Initiator Ready
			Connect a 10-KΩpull-up resistor.
			Connect signal to same pin between
PCI_STOP_N		I/O	the two devices.	I/O	Stop
			Connect a 10-KΩpull-up resistor.
			Connect signal to same pin between
PCI_PERR_N		I/O	the two devices.	I/O	Parity Error
			Connect a 10-KΩpull-up resistor.
			Connect signal to same pin between
PCI_SERR_N		I/O	the two devices.	I/O	System Error
			Connect a 10-KΩpull-up resistor.
			Connect signal to same pin between
PCI_DEVSEL_N		I/O	the two devices.	I/O	Device Select
			Connect a 10-KΩpull-up resistor.
			Connect one of the higher order PCI
PCI_IDSEL		I	address signals to the Device.	I	Initialization Device Select
			Connect a 10K pull-up resistor to the
			Host.
			From the Option device, connect output		Arbitration Request
					On the Option device, these signals are not
			signal PCI_REQ_N[0] to one of the
			PCI_REQ_N[3:0] inputs to the Host.		used, they should be pulled high with a 10-KΩ
PCI_REQ_N[3:1]		I	Note: the PCI_REQ_N[n] must	I	resistor.
					Note: The PCI_REQ_N[n] must correspond
			correspond to the PCI_GNT_N[n],
					to the PCI_GNT_N[n], where “n” must
			where “n” must be the same number in
					be the same number in the square
			the square bracket.
					bracket.
			From the Option device, connect output		Arbitration Request
					On the Option device, this signal is an output
			PCI_REQ_N[0] to one of the
			PCI_REQ_N[3:0] inputs to the Host.		and must be connected to one of the
PCI_REQ_N[0]		I	Note: the PCI_REQ_N[n] must	O	PCI_REQ_N[3:0] inputs to the Host.
					Note: The PCI_REQ_N[n] must correspond
			correspond to the PCI_GNT_N[n],
					to the PCI_GNT_N[n], where “n” must
			where “n” must be the same number in
					be the same number in the square
			the square bracket.
					bracket.
			Connect one of the Host outputs
			PCI_GNT_N[3:0] to PCI_GNT_N[0]		Arbitration Grant
			input to the Option.
					On the Option device, these signals are not
PCI_GNT_N[3:1]		O	Note: the PCI_GNT_N[n] must	O
					used, they should be pulled high with a 10-KΩ
			correspond to the PCI_GNT_N[n],
					resistor.
			where “n” must be the same number in
			the square bracket.
			Connect one of the Host outputs		Arbitration Grant
					On the Option device, this signal is an input
			PCI_GNT_N[3:0] to PCI_GNT_N[0]
			input to the Option.		and must be connected to one of the
PCI_GNT_N[0]		O	Note: the PCI_GNT_N[n] must	I	PCI_GNT_N[3:0] outputs of the Host.
					Note: The PCI_REQ_N[n] must correspond
			correspond to the PCI_GNT_N[n],
					to the PCI_GNT_N[n], where “n” must
			where “n” must be the same number in
					be the same number in the square
			the square bracket.
					bracket.

Intel® IXP45X and Intel® IXP46X Product Line of Network Processors
HDD	February 2007
52	Document Number: 305261; Revision: 004