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Simplified State Machine and DAQ Reset Procedure Overview

This document outlines the simplified state machine model proposed by A. Madorsky. It covers the hard reset process, where triggers are disabled, the DAQ is reset and aborted, and event counters are reset. The BXN counter is initialized to zero, followed by a resynchronization phase with triggers enabled. The notes provide clarity on state transitions, specific commands, and actions associated with each state, including critical details on the BXN counter's behavior during resets. The document serves as a practical guide for understanding the operational flow in DAQ systems.

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Simplified State Machine and DAQ Reset Procedure Overview

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  1. ALCT Sync state machine Simplified A. Madorsky 4/11/2007 • Hard reset • triggers disabled • DAQ reset and aborted • event counters reset • BXN counter = 0 • Resync • triggers disabled • DAQ reset and aborted • event counters reset • Run • triggers enabled • DAQ enabled • event counters enabled Resync BC0 • Notes: • Red – state names • Blue – TTC commands • Bulleted lists – actions in each state • Arrows with TTC commands – transition only on that command, otherwise stay in the same state • Arrows without TTC commands – immediate transition • Transition to Hard Reset state only on Hard Reset command from any other state (not shown) • BXN counter: • Reset on Hard Reset to 0 (no choice here) • Reset on BC0 to the programmable offset value • From 3563 overflows to 0 • Otherwise, ++ on every clock

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