Appendix A: Connectors; Front Panel Leds; Speaker Connector; Table A-1. Leds - RadiSys EPC - 6A Hardware Reference Manual

Appendix A
Connectors
This chapter specifies the details of the connectors and headers on the EPC-6A The
EXMbus connector is not defined here; its definition is available upon request.

Front Panel LEDs

The EPC-6A has four discreet LEDs in the front panel's top left corner. The front panel
also contains a seven-segment LED display. For detailed information about the seven-
segment LED display, see Front Panel Indicators on page 12.
LED
RUN
RESET
ABORT
RUN
SYSFAIL
MASTER
SYSFAIL
SLAVE
MASTER
COM
SLAVE
* The Master LED on and the Run LED off indicates that the EPC-6A stopped because either it can't access
the bus, or because no module responded to the access and the access has not timed out.

Speaker Connector

The speaker header on the EPC-6A circuit board is defined as:
Pin
1
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

Table A-1. LEDs

Color Description
Green Indicates that the EPC-6A's memory is accessed. It first comes on at
power-up and should remain lit as long as the system is running.
If the LED is off, the most probable causes include both of these:
• A "hung" condition occurred in the operating system or application software.
• A VMEbus access is being attempted but the EPC-6A has not received a
bus grant. Typical reasons include: an error in setting the jumpers on the
VMEbus backplane, not being fully seated in the backplane, or a failure in
the SLOT 1 system controller module.
Red Indicates a hardware reset or assertion of the VMEbus line. If a hardware
reset, the LED remains lit until the POST completes.
The LED is active only when the EPC-6A is jumpered as the SLOT 1 controller.
Indicates that the EPC-6A is performing a VMEbus access. The LED
remains lit from the time the 486DX2 processor initiates a read until the bus
operation completes or times out.
Indicates another module performing a memory access into the EPC-6A's
DRAM.

Table A-2. Speaker Connector

Signal
Reference voltage
Pin Signal
2 Speaker tone
A
45