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
75
4.5.5 Measuring the External Target Vcc Voltage
The panel which controls the switching on/off of the
‘External Target Vcc’
voltage is shown below….
Instructions:
•
Ensure that the
’EXTERNAL VCC OUTPUT Voltage’
is switched
OFF
at the supply.
•
Disconnect any cables connected to the
‘Target ISP Connector’
. This will prevent accidental
damage in case of a wiring error!
•
Click the
<Measure V/I>
button to display the voltage measured….
Both the
‘External Target’
INPUT and OUTPUT voltages should read 0.0V.
•
Switch the
‘External Target Vcc’
supply ON (by manually switching on the external power
supply).
•
Click the
<Measure V/I>
button to display the voltage measured….
The programmer now measures 24.0V on the
‘External Target Vcc’
input but 0.0V on the output
as the
External Target Vcc switch’
is OFF.
Click the
<Power up..>
button to switch the
‘External Target Vcc switch’
ON.
The
‘BUSY’
LED on the programmer will illuminate.
The
‘External Target Vcc switch’
is switched ON and so 24.0V should be measured at both input
and the
EXT-VCC-OUT
output (pins 3+4 of the
‘Target ISP Port’
).
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