Pci Arbitration; Table 2-2. Pci Arbitration Assignments - Motorola MVME2603-1121A Installation And Use Manual

PCI Arbitration

There are 7 potential PCI bus masters on the MVME2603/2604
single-board computer:
The Winbond W83C553 PIB device supplies the PCI arbitration
support for these seven types of devices. The PIB supports flexible
arbitration modes of fixed priority, rotating priority, and mixed
priority, as appropriate in a given application. Details on PCI
arbitration can be found in the MVME2600 Series Single Board
Computer ProgrammerÕs Reference Guide (part number V2600A/PG).
The arbitration assignments for the MVME2603/2604 are shown in
the following table.
Raven ASIC (MPU/PCI bus bridge controller)
Winbond W83C553 PIB (PCI/ISA bus bridge controller)
DECchip 21140 Ethernet controller
SCSI controller
SYM53C825A
Universe ASIC (PCI/VME bus bridge controller)
PMC Slot 1 (PCI mezzanine card)
PMC Slot 2 (PCI expansion)

Table 2-2. PCI Arbitration Assignments

PCI Bus Request
PIB (Internal)
CPU
Request 0
Request 1
Request 2
Request 3
Request 4
Operating Instructions
PCI Master(s)
PIB
Secondary Ethernet
Secondary SCSI
Raven ASIC
PMC Slot 2 (PCIX)
PMC Slot 1
Ethernet
SCSI
VMEbus (Universe ASIC)
2
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