Pci Host Bridge; Interrupt Controller (Mpic); Programmable Timers - Motorola MVME2300SC Series Installation And Use Manual

VME Processor Module Programmer's Reference Guide and to the
M48T559 data sheet for detailed programming and battery life
information.

PCI Host Bridge

The Raven ASIC provides the bridge function between the MPC604
processor bus and the PCI Local Bus. It provides 32-bit addressing and 64-
bit data. 64-bit addressing (dual address cycle) is not supported. The Raven
supports various PowerPC processor external bus frequencies up to
66MHz and PCI frequencies up to 33MHz.
There are four programmable map decoders for each direction to provide
flexible address mappings between the MPC and the PCI Local Bus. Refer
to the MVME2300 Series VME Processor Module Programmer's
Reference Guide for additional information and programming details.

Interrupt Controller (MPIC)

The Raven ASIC provides an MPIC Interrupt Controller to handle various
interrupt sources. The interrupt sources are:

Programmable Timers

Among the resources available to the local processor are a number of
programmable timers. Timers are incorporated into the PCI/ISA Bridge
(PIB) controller and the Raven device (diagrammed in
can be programmed to generate periodic interrupts to the processor.
4-17
Four MPIC timer interrupts
Processor 0 self-interrupt
Memory Error interrupt from the Falcon chipset
Interrupts from all PCI devices
Two software interrupts
ISA interrupts (actually handled as a single 8259 interrupt at INT0)
General Description
Figure 4-1). They
4