Artesyn BajaPPC-750, User Manual

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0002M621-15
5
PMC/PCI Interface
The PCI Mezzanine Card (PMC) interface supports the addition of modules that
can provide other functions, such as SCSI, on the BajaPPC-750. The PMC/PCI
interface complies with the Peripheral Component Interconnect (PCI) bus inter-
face standard.
5.1 Features
The BajaPPC-750 uses the Motorola MPC106 to implement the +3.3/5V PMC/PCI
interface, which features:
Expansion Sites The BajaPPC-750 has two PMC expansion sites to support two single-
width PMC modules or one double-width PMC module. Both expansion
sites s3.3-volt or +5-volt PMC modules.
NOTE. The BajaPPC-750 circuit board s3.3-volt module power
from either the VMEbus backplane or the onboard regulator,
depending upon which fuse is installed. F4 selects the back-
plane; F3 selects the onboard regulator. Do not install both fuses
at the same time. Power from either source has a 1-Amp current
limit. (Spare fuses are located at F1 and F2.)
Address and Data Each PMC expansion site uses 32 multiplexed address/data lines to sup-
port 8-, 16-, and 32-bit transfers.
Interrupts Each PMC expansion site supports the four PCI interrupt lines.
Initiator/Master The MPC106 can allow the BajaPPC-750 CPU to act as a PCI bus cycle
initiator.
Target/Slave The MPC106 can act as a PCI bus target for other initiator devices, such
as PMC modules, Ethernet devices, or VMEbus controllers.