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4.2 Typical applications of each power supply
The table below gives an overview of the typical applications of the different ISPnano programmer
power supplies.….
# Power Supply
Voltage
range
(V DC)
Features / typical application of power supply
1 Programmer Controlled
1.8 – 5.0
?
Used to power the internal ‘Programmer Line
Target Vcc (TVCC)
Power Supply
?
?
?
Driver Circuitry’ which sets the signal levels for
the ‘Programmer Target I/O’ pins.
Used to apply controlled power to any Target System
(UUT) which can be powered at 1.8 to 5.0V.
Can also be used to power up the UUT at a specified
voltage for target testing and / or voltage calibration
purposes.
This power supply also features current / over-
current monitoring.
2 Programmer Controlled
Target Vpp (TVPP)
Power Supply
6.5 – 13.5
?
?
This power supply should only be used for devices
which require a ‘Vpp’ programming voltage to force
the device into ‘programming mode’ .
The voltage is defined by the programming
algorithm and is not user-definable.
3 Programmer controlled
EXTERNAL VCC Switch
1.2 – 30.0
?
Allows an ‘External power supply’ to be
switched under programmer control to a Target
System (UUT)
?
?
?
Typically used to power a UUT which requires
an input voltage of >5.0V
Can also be used if the ‘Target I/O Signal
Voltage’ needs to be different to the actual
‘Target Voltage’ e.g. an IC is powered at 3.3V
but the main UUT circuitry must be powered at
e.g. 5.0V.
Used to power the relay coils at +12V on the
‘ISPnano Series 3 ATE’ programmer
The following sections describe the various power supplies in more detail.
ISPnano Series Programmer - User Manual – V1.11 – 12 May 2011
58
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