FIRST PASS DESCRIPTION, ADDRESSABLE VME REGISTERS, FOR ABORT KICKER LOGIC
 
 
 

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XYBEH                                     Even Byte ID Prom                                                    Read

XYBFH                                     Odd Byte ID Prom                                                     Read

XYC1H                                    Status Reg.1(Time Event Link)                                 Read/Write

XYC3H                                    Beam Dump Code                                                      Read/Write

XYC5H                                    Reset Code                                                                 Read/Write

XYC7H                                    Status Reg.2(Beam Sync Link)                                 Read/Write

XYC9H                                    Rotation Fiducial Code                                              Read/Write

XYDFH                                  Vector Reg. 1                                                               Read/Write

XYD1H                                  Routing Reg. 1                                                             Read/Write

XYD3H                                  Vector Reg. 2                                                               Read/Write

XYD5H                                  Routing Reg. 2                                                             Read/Write

XYD7H                                 Abort Time Stamp(MSB)                                             Read

XYD9H                                 Abort Time Stamp(LSB)                                              Read

XYDBH                                Abort Time Stamp(LSB+1)                                          Read

XYDDH                                Abort Time Stamp(LSB+2)                                         Read
 
 

XY = F4(Hex) Yellow Ring
XY = F5(Hex) Blue Ring
 
 

Int. Enable(r/w)-Can enable or mask out interrupt

Rot. Fid. Fail.(r)- Every beam revolution (12.8 usec.) this bit is updated to indicate its status.

Interrupts occur at every change of status. If the event is lost over numerous

Beam cycles a single interrupt occurs. With the appearance of the first subsequent

Fiducial a second interrupt is implemented.

Permit Fail.(r)-Beam permit carrier absent.

Par. Error(r)-Parity error on any Beam Sync Link event.

Clk. Fail(r)-Carrier missing on Beam Sync Link.
 
 

Int. 2(r)-Interrupt if : bit 1 and ( bit 6 or bit 5 or bit 3 goes true or false). This will cause Status Register 2 to be read.
 
 

Reading Status Reg. 2 clears bit 7, bit 6, and bit 5 only. See note at bottom for more detail.
 
 

Int. Enable(r/w)-Can enable or mask out interrupt

Real Time Bm Abt(r)- Indicates when in time there is a beam abort. This occurrence is time

Stamped. This bit "freezes" bit 4 of status reg. 1 and bits 3 and 4 of status reg. 2,

And the time stamp.

Beam Dump(r)-Beam Dump event detected.

Par. Error(r)-Parity error on any Time Event Link event.

Clk. Fail(r)-Carrier missing on Time Event Link.
 

Int. 1(r)-Interrupt if : (bit 1 and ( bit 6 or bit 5 )) or (bit 1 and bit 3). This will cause Status Register 1 1 to be read and Status Register 2 and the time stamp if bit 3 is true.

Reading Status Reg. 1 clears bit 7, bit 6 and bit 5.

Reading Time Stamp clears bit 3 and bit 4.

Notes : 1. For multiple Beam Dump events multiple beam aborts will be executed. The time

stamp retains its information, for each abort, until read by the FEC (which clears bits 3 and 4

of SR2). After this occurs, the Kicker logic will be ready to record all the appropriate

information for any subsequent abort condition. A background time counter, which is

cleared by Reset, insures an accurate time stamp. After each permit failure, 1 second of

carrier has to be detected, before cleared and armed for a subsequent failure.

2. After bit 3 (Beam Abort) is cleared the "freeze" is lifted but Permit Failure and Rotational

Fiducial Failure are not cleared until the permit carrier returns and a valid fiducial is

detected.

3. There are 6 beam abort conditions: