Modules Brief Description 13

1
Modules Brief Description 1/3

• L1
• Sends triggers to EVM and DDU (RU)
• Receives throttle commands from EVM
• EVM
• Receives
• Triggers from L1
• Event requests and releases from BU via BCN
• Sends
• Throttle commands to L1
• Triggers to RU via RCN
• Event IDs to BU via BCN

2
Modules Brief Description 2/3

• RU (emulates 1 DDU)
• Sends data fragments to BU via BDN
• Receives
• Triggers from L1 (DDU)
• Triggers from EVM via RCN
• Data fragment requests from BU via BCN
• BU (emulates N Filter Nodes each with M CPUs)
• Sends
• Event requests and releases to EVM via BCN
• Data fragment requests to RU via BCN
• Receives
• Event IDs from EVM via BCN
• Data fragments from RU via BDN

3
Modules Brief Description 3/3

• BCN (no internal structure NICs do the work)
• Sends control messages to EVM, BU, RU
• Receives control messages from BU, EVM
• BDN (no internal structure NICs do the work)
• Sends data fragments to BU
• Receives data fragments from RU
• XDAQ does not distinguish BCN and BDN
• EVBSIM uses BCN also for data fragments