0 BCntRes   BCReset
 1 EvCntRes  ECReset
 2 Brcst(2)  FEReset bit - system message
 3 Brcst(3)  Broadcast bit - system message
 4 Brcst(4)  Broadcast bit - system message
 5 Brcst(5)  Broadcast bit - system message
 6 Brcst(6)  Calibrate bit - user message
 7 Brcst(7)  Broadcast bit - user message
 8 L1Accept  Trigger
 9 BrcstStr1 Broadcast strobe - system message
10 BrcstStr2 Broadcast strobe - user message
11 DoutStr   Long-format data strobe
12 DbErrStr  Double error or frame error occured
13 SinErrStr Single error occured
14 TTCReady  TTCrx operating correctly
15 reserved = 0