ADLINK DAQe-2214 - Manual (Page 84)

72 Operation Theory
When using AFI[0] as the external ADCONV source,
each rising edge of AFI[0] would bring an effective con-
version signal. Also note that the AFI[0] signal should be
TTL-compatible and the minimum pulse width is 20 ns.
5. DA_TRIG is the trigger signal for the D/A operation and
may be derived from external digital trigger, analog trig-
ger, internal software trigger, and SSI_AD_TRIG. Refer
to section 4.5 for detailed description.
6. DAWR is the update signal to initiate a single D/A con-
version and may be derived from internal counter, AFI[1]
or SSI_DAWR. Note that this signal is edge-sensitive.
When using AFI[1] as the external DAWR source, each
rising edge of AFI[1] would bring an effective update sig-
nal. Also note that the AFI[1] signal should be TTL-com-
patible and the minimum pulse width is 20 ns.
NOTES The DA_TRIG and DAWR timing signals are available
only on DAQ-/DAQe-2214.