Silicon Explorer Target Connections
Target Power
Power and ground leads are provided on the target cable assembly (TCA) for connection to a +3V to +5V
source. Two micro-grabber test clips are used for connection to power test points on the target board.
1.
2.
3.
Insert the target cable assembly (TCA) 2 mm header into Silicon Explorer. The connector is keyed and
will only go in one way.
With power removed from the target circuit, connect the TCA power and ground leads to the power
(+3V to +5V) and ground test points on the target board. The TCA power lead is labeled +5V but can
be connected to any voltage between +3V and +5V on the target.
Apply power to the target circuit.
Note: Note: The amount of current drawn by Silicon Explorer depends on the sample rate selected and
number of active input channels and ranges from 125mA to 750mA with a 5V supply.
Power Adapter
The supplied power adapter (Silicon Explorer II) is a compact switching power supply that provides +5V at 1
A for applications where target power is not available or insufficient. The power supply is plugged into the
power jack located on the Silicon Explorer II next to the serial cable.
1.
2.
3.
With the power adaptor disconnected from any wall outlet, insert the power adaptor's plug into the
power jack on the Silicon Explorer II.
Connect the Silicon Explorer II ground leads to the target.
Plug the power adaptor into a wall outlet.
External Power Supply
An external +5V power supply may be used to power Silicon Explorer when target power in insufficient.
Power and ground leads are provided on the target cable assembly (TCA) for connection to the +5V source.
Two micro-grabber test clips can be used for connection to ground test points on the target board.
1.
2.
3.
4.
Insert the target cable assembly (TCA) 2mm header into Silicon Explorer. The connector is keyed and
will only go in one way.
With the external power supply turned off, connect the Silicon Explorer and external power supply
ground leads to the ground plane of the circuit under test.
Connect the Silicon Explorer and external power supply +5V leads together.
Switch on the external supply.
Current Consumption
Silicon Explorer is a CMOS device and exhibits very low current consumption at idle, rising rapidly to several
hundred milliamps during acquisition. The amount of current required depends on the sample rate and
number of active channels. If your power supply is unable to supply the inrush current, Silicon Explorer or
your target may reset. The following lists the minimum and maximum current requirements at 5V. Current
will be proportionately higher at 3V:
Idle
Minimum Acquisition
Maximum Acquisition
125 mA
350 mA
750 mA
Debug Port
You can connect the probe leads by attaching one of two supplied cable assemblies. One cable assembly
terminates in individual 0.025 receptacles that can connect to 0.025 headers or micro-clips according to the
labels on the wires - the other assembly interfaces directly to the target board when a 16-pin header is
installed on the target according to the pin-out shown on the bottom of the Silicon Explorer.
Silicon Explorer II User's Guide
11
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