Advantech SPC-530 user manual Appendix a Backplanes Optional, Resistor Signals

Appendix A Backplanes (Optional)

PCA-6120P4 Rev. A1: 15 ISA / 4 PCI / 1 PICMG-slot passive backplane

Dimensions: 420 x 260 mm

Termination resistor signals

The termination resistors provide an impedance mismatch at the end of the bus, to prevent signal reflections. This mismatch has to be balanced by the capability of the CPU and optional cards to electrically drive the load imposed by the resistor.

Resistor	Signals	Resistor	Signals
RN1, RN8	SA7-SA0	RP1, RP2	MEMW, SMEMR, IOW, IOR
RN4, RN11	SA15-SA8	RN2, RN12	SBHE, LA23-LA17
RN5, RN10	SD0-SD7	RN6, RN7	SA19-SA16
RN3, RN9	SD8-SD15

SPC-530 User's Manual 9