Difference: AMC13UserManual (38 vs. 39)

Revision 3911 Apr 2018 - EricHazen

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META TOPICPARENT	name="HcalDTC"

THIS MANUAL IS INCOMPLETE but what is written here should be more accurate and up to date than the old "functional specification". Please e-mail me if you find mistakes/omissions here (Eric H).

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to control the trigger rate in response to pending buffer overflows. This system is intended to be logically compatible with the legacy system documented HERE

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Recently (2018) a new set of states has been added, please see this page

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The AMC13 outputs the TTS state as the four-bit code described in the link above:

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The AMC13 outputs the TTS state as the four-bit code described in the links above:

	0000		Disconnected		Hardware Failure or broken cable
	0001		Overflow Warning		Imminent buffer overflow

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0110

DAQ Overflow Warning

Overflow warning due to DAQ link backpressure (2018)

	0010		Sync Lost		AMC13 is not synchronized with DAQ due to buffer overflow
	0100		Busy		Cannot accept triggers

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1000

REady

Ready to accept triggers

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1000	Ready	Ready to accept triggers
1001	Private Request 1	Available for private use (2018)
1010	Private Request 2	Available for private use (2018)
1011	Private Request 3	Available for private use (2018)

	1100		Error		Any other state that prevents functioning
	1111		Disconnected		Hardware failure or broken cable

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The states "Private Request 1..3" have the same priority as "Ready". They are never internally generated by the AMC13 but are passed on if received from connected AMC cards in the crate.

The state "DAQ Overflow Warning" indicates that the AMC13 has an impending buffer overflow and that simultaneously the DAQ output link has asserted the busy (backpressure) signal.

The states marked (2018) were recently added and must be explicitly enabled by setting bit 9 in T1 register 1 (tentatively named CONF.ENABLE_WARNING_DUE_TO_DAQ_TTS in the AMC13 address table). These features were added in about firmware version 0x6061 (0x2261).

Any time the AMC13 is not in run mode (such as after power up) the AMC13 sends state "0100" (busy).

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