16BTTracer Protocol Analyzer User’s ManualCATC Version 1.0Table 2: External Interface Breakout BoardBreakout Board External Output Signalling PinsThe "TRG OUT" and "G.P. OUT" pins found on the Analyzer’s BreakoutBoard have similar functions. Both pins serve to transmit output signalswhen a trigger event occurs. The main differences between the two pins isin the number of signals that the Analyzer will send through them (TRGOUT will transmit just one signal whereas G.P. OUT may transmit severalsequential signals), and in their initial state (TRG OUT is always enabled bythe Analyzer whereas G.P. OUT must be enabled in the recording optionsbefore it can be utilized).TRG OUTWhen an event trigger occurs, TRG OUT transitions from ground to acontinuous 5 V signal on the first instance of a trigger event. TRG OUT isa one-time event: it will not re-signal or change signals with subsequenttriggering events. When this first trigger event occurs, the Trigger LED willilluminate (so this pin can be thought of as a reflection of the state of thisLED).6 GND Ground7 GND Ground8 GND Ground9 GND GroundPin Signal Name Signal Description
