Appendix A. A. A. A. Appendix Peripheral Circuit Design Peripheral Circuit Design; Io Extension Of Pci Bus; Number Of Pci Devices - Epson SCE8720C Series Hardware Manual

Appendix A. Peripheral circuit design Appendix A. Peripheral circuit design
Appendix A. Peripheral circuit design Appendix A. Peripheral circuit design
A.1 IO extension of PCI bus
A.1.1 Number of PCI devices
Up to 3 devices can be connected to the PCI bus of SCE8720C (excluding Geode CS5530).
Among them, up to 2 devices can be used as masters.
To connect more devices, PCICLK can be divided as shown below. In this case, it is
necessary to confirm the waveform of PCICLK using an actual circuit. Also, determine
whether or not a terminal circuit of PCICLK is needed. Since loads of other signals are
also increased, these signals must be checked as well. When using divided PCICLK, do
not use PCICLK for the extended slot. More than 1 device might be connected in a board
Connected to extended slot.
Note that customization of BIOS is needed in order to increase the number of PCI
Devices.
CARD-PCI
PCICLK0-2
Rev.A
PCICLK terminal circuit (Eg. 15pF, 33Ω)
PCI device
or slot
PCI device
or slot
Figure A.1 PCICLK division
EPSON
CARD-PCI/GX Hardware Manual
PCICLK terminal circuit (Eg. 15pF, 33Ω)
PCI device
PCI device
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