3U Turbo CPU Board for UMAC Turbo and Turbo Stack
10
Hardware Setup
Reference Voltage Connect Jumper
Jumper E12 permits the reference voltage for the analog and digital circuits in the 3U Turbo PMAC2
system to be tied together. If you are not isolating the analog circuits from the digital circuits, this jumper
should be ON. (Note that in a Turbo Stack system, you
cannot
isolate these circuits from each other.) If
you are isolating the analog circuits from the digital circuits, using separate isolated supplies for the two
circuits, this jumper should be OFF.
Interrupt Select Jumpers
If the Option 2 PC/104-bus interface is installed, the 3U Turbo CPU can interrupt the PC/104 host
computer over one of four interrupt lines as selected by jumpers E7 – E10. At most, one of these jumpers
should be ON in any configuration.
•
E7 ON selects interrupt line IRQ10
•
E8 ON selects interrupt line IRQ11
•
E9 ON selects interrupt line IRQ12
•
E10 ON selects interrupt line IRQ15
Serial-Port Level Select Jumpers
The standard J7 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.
Re-Initialization Jumper
If jumper E3 is installed when the board is powered-up or reset, the board firmware will go through a re-
initialization process, returning most I-variables to factory default values. It will also go through an
system auto-detection process, selecting which of the Servo ICs and MACRO ICs that it finds will be the
source of the servo and phase clock signals for the system.
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