PPC7A Product Manual
General Description
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amount of cache that can be fitted depends on the CPU that is fitted to the PPC7A, for example the
MPC7455 limits the external cache to 2 Mbytes.
VMEbus Interface
The Tundra Universe II chip provides a full master/slave VMEbus interface. Features include:
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Full slot 1 (system controller) functionality
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Interrupt handling
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Interrupt generation
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DMA control
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VME64 support
VMEbus slave address decoding is software configurable.
Utility I/O and Auxiliary Function Bus
To take full advantage of low-cost, industry standard components, general purpose I/O and auxiliary
functions are implemented through an South bridge bus interface. Facilities provided include:
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Parallel/printer port
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Four PC-compatible serial interfaces
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Floppy disk controller
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Real-time clock
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Keyboard/mouse interface
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USB
Input/Output
The PPC7A has a wide variety of possible I/O connectivity, including the following ports:
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Ultra-SCSI
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Ethernet
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Serial
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Mouse/keyboard
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Parallel/printer
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USB
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VGA-Graphics
To maximise the flexibility of connecting to these ports, a range of I/O modules are available, attached
by a VME P2 transition module. Using rear I/O minimises the effort needed to remove boards from a
rack, so improving maintainability and reliability.
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