SCL Signals Used by the TABs and GAB

updated: 17-Jan-03

SCL Signals

See also Serial Link Receiver Specifications

Signal In/Out Used By Comments
SCL_ACK Out TAB,GAB In reset
SCL_READY In SCLR  
SCL_SYNCERROR In SCLR  
SCL_DATAERROR In SCLR  
CLK_53 In GAB,TAB Main clock - always present
CLK_7 In GAB,TAB BC clock - only on valid data
Increments BX counter
 
CURRENT_TURN[15..0] In GAB? Turn Number - this period
CURRENT_BX[7..0] In GAB? Crossing Number - this period
FIRST_PERIOD In GAB,TAB 1st period in turn
Increments TURN counter
Resets BX counter to 1
BEAM_PERIOD In GAB,TAB ? Period with beam marker
SYNC_GAP In GAB,TAB ? No L1 Accepts
COSMIC_GAP In GAB Only Cosmic triggers
SPARE_PERIOD In SCLR  
 
L1_PERIOD In GAB,TAB L1 Accept this period
L1_ACCEPT In GAB,TAB L1 Accept this geographic section
L1_TURN[15..0] In GAB Turn Number - L1 Accept
L1_BX[7..0] In GAB Crossing Number - L1 Accept
L1_QUAL[15..0] In GAB,TAB Only some bits
L2_PERIOD In GAB? L2 decision this period
L2_ACCEPT In SCLR L2 Accept this geographic section
L2_REJECT In SCLR L2 Reject this geographic section
 
INIT_SECTION In GAB,TAB Initialize
Resets BX & TURN counters to 0
L1_BUSY Out GAB,TAB Sending data to L2
L2_BUSY Out SCLR  
L1_ERROR Out GAB Request initialization
L2_ERROR Out SCLR  
INIT_ACK Out GAB,TAB Acknowledge init request
SYNC_LOST Out SCLR  
SPARE_STATUS[1..0] Out SCLR  

L1 Qualifiers
Bit Name HW/Std Used by L1Cal
00 L2ForcedWrite Std no
01 L2GlobalNeeded Std no
02 L2MuNeeded Std no
03 L2UnbiasedSample HW no
04 L2EmNeeded Std no
05 L2JetNeeded Std no
06 L2EtMissNeeded Std no
07 CollectStatus HW Yes - Collect monitoring data
08 L2PSNeeded Std no
09 L2TrackNeeded Std no
10 L2ImpactNeeded Std no
11 reserved HW  
12   Std  
13   Std  
14 L2STTNeeded Std no
15 reserved HW  
  1. HW or Std refer to "hardware" type or "standard" type qualifiers.
  2. A Standard L1_Qualifier is asserted for a given event if any one of a defined subset of the 128 L1 Specific Triggers fired for that event. The "defined subset" of L1 Specific Triggers for each of the 12 Standard L1_Qualifiers is setup by COOR at the COOR to Trig FW trigger download time, i.e. their meaning is dynamic and can be moved by COOR to fit the user's requirements.
  3. A Hardware L1_Qualifier is asserted if its electrical input control signal is asserted. These are hard wired so they can not be moved about by COOR.