Motorola MVME2400 - Manual (Page 52)

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Functional Description
3
General Description
The MVME240x is a VME processor module equipped with a PowerPC
604 RISC (MPC750) microprocessor.
As shown in the Features section, the MVME240x offers many standard
features desirable in a computer system—including Ethernet and debug
ports, Boot ROM, Flash memory, SDRAM, and interface for two PCI
Mezzanine Cards (PMCs), contained in a one-slot VME package. Its
flexible mezzanine architecture allows relatively easy upgrades of the I/O.
There are four standard buses on the MVME240x:
As shown in Figure 3-1, the PCI Bridge portion of the Hawk ASIC
provides the interface from the Processor Bus to the PCI. A W83C553
PCI/ISA Bridge (PIB) Controller device performs the bridge function
between PCI and ISA. The Universe ASIC device provides the interface
between the PCI Local Bus and the VMEbus. Part of the Hawk ASIC is the
ECC memory controller.
The Peripheral Component Interface (PCI ) local bus is a key feature. In
addition to the on-board local bus peripherals, the PCI bus supports an
industry-standard mezzanine interface, IEEE P1386.1 PMC (PCI
Mezzanine Card).
Block Diagram
Figure 3-1 is a block diagram of the MVME2400’s overall architecture.
MPC750 Processor
The MVME240x can be ordered with a PowerPC 750 processor chip with
32MB to 128MB of ECC SDRAM, and up to 9MB of Flash memory.
PowerPC Processor Bus ISA Bus
PCI Local Bus VMEbus