95x Series Operating Manual - May 17, 2022
Page
107
of
155
STARTING WITH THE START SIGNAL
The following timing constraints on the DIO signals must be observed when starting a test sequence using the
START signal
–
•
The TESTING output signal from the 95x must have been inactive for >5ms before a sequence may be
started.
•
If enabled, the ABORT signal must be inactive for >5ms before the inactive to active transition of the
START signal.
•
The START signal must have been inactive for >5ms before attempting to start.
•
The START signal must be active for >10ms, there is no maximum time.
•
If enabled, the SEQUENCE signals must all be stable in the required state for >5ms before and after the
inactive to active transition of the START signal.
The test sequence is started within <(10ms + 1ms per test step in the sequence commanded by the SEQUENCE
input signals if enabled) after recognition of the inactive to active transition of the START signal. At that time the
PASS, FAIL and TESTING output signals are set by the 95x to the following states with <±100us skew between
them-
•
PASS and FAIL
–
both made inactive if the sequence is valid and started correctly, otherwise PASS is made
inactive and FAIL is made active.
•
TESTING
–
made active if the sequence is valid and started correctly, otherwise remains inactive.
ABORTING WITH THE ABORT OR INTERLOCK SIGNALS
If enabled and the ABORT signal is active for >5ms then any running test sequence is aborted.
If enabled and the INTERLOCK signal is inactive for >5ms then a test sequence is aborted if it is presently running
an ACez, ACW, ACCAP, ACI, BRKDN, DCez, DCW, DCIR, DCI, GBez, GB or PULSE type step. It has no effect on any
other type of step or if a test sequence is not being run.
PASS, FAIL AND TESTING SIGNALS AT THE END OF A TEST SEQUENCE
Within <5ms after a test has completed the PASS, FAIL and TESTING output signals are set by the 95x to the
following states with <±100us skew between them
–
•
PASS and FAIL
–
one is made active and the other remains inactive depending on the status of the
sequence.
•
TESTING
–
made inactive.
HV PRESENT AND DWELL OUTPUT SIGNALS
These are asynchronous signals which indicate their respective conditions. They do not have any relevant timing
specifications.
EXAMPLES
Example 1 -
It is desired to drive a TESTING IN PROGRESS warning indicator, external to the 95x. The indicator is illuminated
when driven with 12Vdc and draws less than 100mA. The indicator does not illuminate at a current of 3.2mA.
In this case the indicator may be driven directly from the 95x DIO TESTING signal and the 95x internal 12V power
source from the DIO connector. The indicator is simply wired between the DIO connector pin 1 (+12V) and pin 14
