Motorola ATCA-717 - Manual (Page 47)

On−Board Hardware Accessories Installation
PENT/ATCA−717 47
Figure 4: Location of PMC Slots
PMC slots 1 and 2 belong to one PCI segment and PMC slots 3 and 4 belong to another
PCI segment. Within the same PCI segment, it is possible to install two PMC modules of
different modes (PCI/PCI−X) and speeds (33/66/100 MHz). The PMC module with the
overall lower performance (combination of speed and PCI mode) determines the speed
and PCI mode of the second PMC module.
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Example: a A PMC module supporting PCI−X/66MHz is installed into PMC slot 1 and a
PMC module supporting PCI/66MHz is installed into PMC slot 2. In this case both PMC
modules are operated in PCI/66 MHz mode because the PMC module with the overall
less performance is the one supporting PCI/66 MHz and consequently the second PMC
module is operated in this mode as well.
a
Before installing PMC modules, the following general safety notes must be observed. a