ADLINK cPCI-6520 - Manual (Page 52)

40 Board Interfaces
PMC Frequency Switch (SW_PMC1)
Switch SW_PMC1 sets the frequency and mode of the PMC
slot. All are set to OFF by default..
PMC VIO Function (SW_VIO1)
Switch SW_VIO1 sets the VIO signal voltage of the PMC slot.
Pin# Status Function
1
OFF 64-bit bus (default)
ON 32-bit bus
2
OFF PCI 33 MHz (default).
ON PCI 66 MHz
3
OFF PCI-X mode (default)
PCI mode
4
OFF PCI-X 133 MHz (default)
ON PCI-X 100M Hz
Status Function
OFF (short 1-2) 5V
ON (short 2-3) 3.3V (Default)
ON
1 2 3 4
1
ON OFF