Dut Routed To Internal Programmer (Relays On) - Equinox Systems ISPnano IV-ATE Series Hardware User Manual

4.6 DUT routed to internal programmer (RELAYs ON)

When the relay coils are energised, the 'Target System (UUT)' connections are routed to the
'Internal Programmer'. The 'External ATE / ICT System' is at this point completely disconnected
(out of circuit). This allows the programmer to power up and program the 'Target Device' without any
problems related to the external system loading the power or programmer signal lines.
The path of a single signal or passive power / GROUND line is shown in the schematic below.
Please note:
•
When the relays are in this state, the 'External ATE System' is completely isolated from both
the 'Target System' and the 'Internal Programmer electronics'.
•
All 'Target System' I/O signals, power and GROUND are now routed to the internal
'Programmer Driver / Power Circuitry'.
•
The relays are automatically energised (switched ON) by the programmer when a
programming operation is started.
•
It is also possible to control the relay switching from an external system if required.
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