4 Chapter 1: Overview553-3211-510 Standard 1.0 October 1998Application Module hardware componentsThe Single Board Computer (SBC) card can be either anMVME147SA-1 or an MVME167-03. For easier reading, this card will bereferred to as the MVME147/167 card.The hardware components listed below (see Figures 1 and 2) are field-replaceable units.• MVME147SA-1 SBC cardThis is the main CPU card of the Application Module. There are fourLEDs and two switches on the faceplate of the SBC card:— The red LED (Fail indicator) is lit when the BRDFAIL bit is set orwhen a watchdog time-out occurs. It is normal for this indicator toflicker while diagnostics are running; when a failure occurs, thisindicator is steadily lit.— The yellow LED (Status indicator) is lit when the MC68030STATUS pin is low (when steadily lit, it indicates that the processorhas stopped).— The green LED (Run indicator) is lit when the microprocessorexecutes a bus cycle.— The green LED (SCON indicator) is lit to indicate that the SBCcard is the VME bus system controller.— The ABORT switch stops program execution and returns control tothe debugger.— The RESET switch, when enabled, generates a local reset. If theSBC card is the system controller, this switch also generates aVME bus system reset.!CAUTIONRisk of data lossDo not press both the ABORT and RESET buttons atthe same time—you risk losing device configurationinformation.
