UMAC-CPCI Turbo CPU Board Hardware Reference Manual
6
Hardware Setup
Serial-Port Level Select Jumpers
The standard serial port can be used for either RS-232 or RS-422 serial communications. To use RS-232,
jumpers E17 and E18 should connect pins 1 and 2; to use RS-422, jumpers E17 and E18 should connect
pins 2 and 3. The front-panel DB-9 serial connector provides only the RS-232 signals, so in order to use
this connector, E17 and E18 must both connect pins 1 and 2.
DPRAM IC Select Jumper
The UMAC-CPCI Turbo CPU board can provide dual-ported RAM (DPRAM) communications using
either the on-board Option 2B DPRAM IC through the USB or Ethernet port, or using the DPRAM IC on
the CPCI bridge daughter board through that board’s CPCI port. Jumper E24 must connect pins 1 and 2
to use the on-board Option 2B DPRAM; it must connect pins 2 and 3 to use the CPCI bridge board
DPRAM.
Flash IC Firmware Bank Select Jumpers
Some makes of the U10 flash memory IC on the UMAC-CPCI Turbo CPU board can store multiple
versions of the operating firmware inside. Jumpers E25A, E25B, and E25C select which bank is loaded
into active memory on a normal power-up/reset, and which bank will be written to if the board is powered
up or reset with the E23 jumper on.
The eight possible settings of these three jumpers provide eight banks for the firmware. A standard
production version of the UMAC-CPCI Turbo CPU board is shipped with firmware loaded only in the
bank selected by having all three of these jumpers OFF.
Flash IC Power Supply Select Jumper
Jumper W1 is set at the factory for the voltage level of the flash IC installed in U10. It connects pins 1
and 2 for a 3.3V flash IC; it connects pins 2 and 3 for a 5V flash IC. Even if this is a removable, not
soldered, jumper, it should not be changed by the user.
Power-Supply Check Select Jumper
The UMAC-CPCI Turbo CPU board has a circuit to evaluate the voltage levels received through the J1
Compact UBUS backplane connector. This circuit can then notify other boards in the system (without
software intervention) of a bad supply, so the outputs of those boards are automatically shut down.
Jumper E11 should be OFF if only the 5V supply is checked for this purpose; it should be ON if the +12V
and –12V backplane supplies are to be checked for this purpose. Note that many users will provide a
separate is/-12V supply into the analog axis boards, and each analog axis board has its own
power-supply check circuit.
Reset-Lock Jumper
Putting jumper E0 ON locks the UMAC-CPCI Turbo CPU board in the reset state. This setting permits
the loading of logic into the programmable ICs on the board and is for factory use only. This jumper
should be OFF for all normal operation.
