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 | RP1, RP2 | MEMW, SMEMR, IOW, IOR | |
RN4, RN11 | RN2, RN12 | SBHE, | |
RN5, RN10 | RN6, RN7 | ||
RN3, RN9 |
|
|
9 |
