Mips Technologies Malta - Chapter 5: Hardware Description; PCI Bus; Table 5.1 IDSEL and INT# for PCI Devices

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Chapter 5

MIPS® Malta™ User’s Manual, Revision 01.07 31

Hardware Description

This chapter describes the Malta Board’s hardware components. For more detailed information on these components,

refer to the Malta Schematics [16].

5.1 PCI Bus

The PCI bus is implemented as a 5V, 32-bit and 33 MHz PCI standard version 2.2 compliant bus [1] that connects the

main components on the Malta Board.

The devices on the PCI bus are:

• Core Board connector for connection to the system controller on the Core Board

• Intel PIIX4E South Bridge, 82371E (U9)

• AMD Ethernet controller, Am79C973 (U41)

• Crystal Audio controller, CS4281 (U23)

• Four 5V, 32-bit PCI connectors (J12-J15) that can be used for debug and trace and/or for installation of PCI

boards

For conﬁguration purposes, the IDSEL and INT# signals to the PCI devices are connected as shown in Table 5.1.

Table 5.1 IDSEL and INT# for PCI Devices

Device

IDSEL PCI

Address

PCI Interrupts Mapping

PCI_INTAN PCI_INTBN PCI_INTCN PCI_INTDN

South Bridge PCI_ADP20 USB_IRQ#

Ethernet controller PCI_ADP21 ETHER_IRQ#

Audio controller PCI_ADP22 AUDIO_IRQ#

Core Card PCI_ADP27

PCI Connector 1 PCI_ADP28 INTA# INTB# INTC# INTD#

PCI Connector 2 PCI_ADP29 INTD# INTA# INTB# INTC#

PCI Connector 3 PCI_ADP30 INTC# INTD# INTA# INTB#

PCI Connector 4 PCI_ADP31 INTB# INTC# INTD# INTA#