Distributor of Equinox Technologies: Excellent Integrated System Limited
Datasheet of ISPNANO S3 KIT - ISP PORTABLE PROGRAMMER
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ISPnano Series Programmer - User Manual – V1.11 – 12
th
May 2011
62
4.6 External VCC – programmer controlled switch
The ISPnano programmer features a special
‘External VCC Switch’
circuit which allows an
‘External
Voltage (V_EXT)’
in the range of 1.6V – 24V to be switched through the programmer to the Target
System under project control. This feature is useful when the Target System features a
‘Voltage
Regulator Circuit’
which needs to be powered from a higher voltage than +5V. In order to power
many Target Systems, it is necessary to apply a voltage of eg. 7 – 24V to the input of the Target
System regulator circuit.
Power supply features:
•
Allows an
‘External power supply’
to be switched under programmer control to a Target
System (UUT)
•
Any voltage between 1.2 and 30V can be switched via the
‘External VCC Switch’
circuit.
•
The
‘External VCC Switch’
circuit is rated at 1 Amp.
•
Internal self-resetting fuse for protection against short-circuit conditions
•
Both the input and output
‘External Voltage (V_EXT)’
can measured by the programmer
The diagram below shows a typical example where an external power supply is switched to the
Target System (UUT) through the programmer.
Fig. 4.6 ISPnano – Powering Target System using External Switched Voltage
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