Technical data

Programming Details

MVME4100 Single Board Computer Programmer’s Reference (6806800H19B)

4.11.1 PCI IDSEL and Interrupt Definition

Each PCI device has an associated address line connected via a resistor to its IDSEL pin for

Configuration Space accesses. The following table shows the IDSEL assignments for the PCI

devices and slots on each of the PCI busses on the board along with the corresponding interrupt

assignment to the PIC external interrupt pins. Refer to the MPC8548E datasheet and the PLX

PCI6520 data sheet for details on generating configuration cycles on each of the PCI busses.

Refer to the MPC8548E reference manual for additional details about the MPC8548E PIC

operation.

Table 4-8 IDSEL and Interrupt Mapping for PCI Devices

PCI Bus

Device

Number

Field

AD Line

for IDSEL

PCI Device

or Slot Device/Slot INT to MPC8548E IRQ

INTA# INTB# INTC# INTD#

PCI1

(8548E)

0b0_0000 internal MPC8548E - - - -

0b0_0001 17 Tsi148 VME IRQ0 IRQ1 IRQ2 IRQ3

0b0_0010 18 PCI6520 - - - -

0b0_0011 19 PCI6520 - - - -

PCI1

(PCI6520)

0b0_0000 20 PMC1

Primary

IRQ4 IRQ5 IRQ6 IRQ07

0b0_0001 21 PMC1

Secondary

IRQ5 IRQ6 IRQ7 IRQ4

0b0_0010 22 PMC2

Primary

IRQ6 IRQ7 IRQ4 IRQ5

0b0_0011 23 PMC2

Secondary

IRQ7 IRQ4 IRQ5 IRQ6

PCI2

(PCI6520)

0b0_0010 20 uPD720101

USB

IRQ4 IRQ5 IRQ6 -