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3.7 Customer Target System / Target Supply
It is possible to power the ISPjuno programmer from the customer's target system / PCA.
The programmer takes it power from the Target Board supply via the TVCC and GROUND wires of
the 'ISP cable' which connects between the programmer 'Target ISP Port' and the Target System.
Important note:
This method of powering the programmer is not recommended due to the high current required by
the programmer during the programming process. The target supply must have enough headroom to
supply at least 200mA to the programmer.
Instructions:
•
Connect a suitable 'ISP cable' between the programmer 'Target ISP Port' and the Target
System
•
Connect an 'external power supply' to the Target System .
•
Set the 'current limit' on the 'external power supply' to a suitable value which can power both
the programmer and Target System .
•
Switch on the 'external power supply'
•
The programmer should power up and show text on the display.
ISPJUNO - Portable ISP Programmer - User Guide V0.84 – 17/04/20
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