1. Discussion Items Clock PC and/or VME CPU Trigger readout
Clock distribution
Local clock
PC and/or VME CPU
Trigger readout
ECL Belle2link

2. Clock [1] Who needs what clock? COPPER system: 42.3MHz
KEK has customized crystals.
RocketIO (high speed link): 127MHz / 125MHz
127MHz crystal is not commercially available, which is needed if one tries to get that from local oscillator.
Someone can distribute customized crystals.
5000 JPY/crystal.
Switching off clocks / switching clock freq. to others.
Onboard-implemented oscillator or pluggable clock card?
FINESSE
SCK & RCK (differential pairs).

3. Clock [2] Who (related to TRG) needs what clock?
GDL & CDC: MN and YI will discuss.
ECL: through collector board(s).
FAM on the detector through collector board
6x TMM in the EH through GDL (single-ended LEMO?).
TOP: through RCK or else. 9 boards need clock.
KLM: same as TOP for convenience.

4. Clock [3] Who (related to TRG) needs what clock?
All trigger sub-modules will use the clock from the single origin (or use a local oscillator during maintenance).
Clock monitoring 2x pins should be implemented on the electronics board.

5. PC and/or VME CPU [1] # of PCs and/or VME CPUs
TTD: 10 CPUs.
GDL+CDC-TRG: 5 CPUs.
ECL: O(1) PCs to control 52 FAMs + >= 1 PC for firmware downloading.
E-KLM: 6 PCs + 9 VME crates.
CDC: >= 1 PC
HV/LV control: >= 1 PC per detector
Isolated network from “fbdaq”.
CPUs are booted up from limited # of places.

6. PC and/or VME CPU [2] Slow control
Another isolated network from the one in the previous page.

7. Trigger Readout [1] TRG will be readout by B2Link?
Yes.
Any possibility to recycle AMT-3 FINESSE?
No.
Summary needed
Homework to YI by the next B2GM.

8. Trigger Readout [2] CDC TRG / ECL TRG raw data TOP TRG raw data
Readout by local monitoring system.
Need not taken care by the CDAQ.
TOP TRG raw data
Readout by COPPERs.

9. Homework to MN
Level-1 latency