Intel E7520 user manual Platform IRQ Routing, SMBus Block Diagram

Dual-Core Intel Xeon processor LV / E7520 Chipset / 6300ESB ICH

Figure 19. SMBus Block Diagram

Allagash SMBus					3.3VSBY
				ICH-S		N
						SMBALERT
			SMB	HECETA	0-ohm
			ICH	7
		3.3VSBY
				SMBus	TPM
				Repeater
	SMBus			SMBus	ID		PCI Express Slot
	Repeater
				Repeater	EEPROM		(Slot # 3)
ITP -	0-ohm
XDP							PCI Express Slot
		3.3V			0-ohm
SMBus				3.3V			(Slot # 4)
Master Only
Intel® E7520-			SMBus				PCI Express Slot
		Repeater
PF							(Slot #5)
	SMB				DIMM #A1	DIMM #B1
					Addr 0xA0	Addr 0xA8	PCI 32-bit/33MHz
	MCH						(Slot #6)
CK409B					DIMM #A2	DIMM #B2
					Addr 0xA2	Addr 0xAA	PCI-X 66MHz Slot
							(Slot #7)
DB800					DIMM #A3	DIMM #B3	PCI-X 66MHz Slot
					Addr 0xA4	Addr 0xAC
							(Slot #8)
					DIMM #A4	DIMM #B4
					Addr 0xA6	Addr 0xAE
					DDR CH A	DDR CH B

3.3.13Platform IRQ Routing

Figure 20 shows how the 6300ESB uses these segments:

•IRQ 14 for IDE segment

•SERIRQ for SIOPIXRQ segment

•PCRIRQ for the PCI-X segment

•PIRQ for the PCI 32/33 segment

Dual-Core Intel® Xeon® processor LV with Intel® E7520 Chipset and Intel® 6300ESB ICH
User’s Manual	April 2007
34	Order Number: 311274-009