Equinox Systems ISPnano I Series User Manual page 80

Distributor of Equinox Technologies: Excellent Integrated System Limited
Datasheet of ISPNANO S3 KIT - ISP PORTABLE PROGRAMMER
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External
Target
Power Supply
1.6 - 24.0V
V
EXT
Programmer
Power Supply
9.0 - 24.0V
STAR connected EARTH point
Typical scenario:
An 'External' voltage 'VEXT' in the range of 1.6 – 24.0V is fed into the EXT-VCC-IN
•
connector of the programmer from an external power supply.
This voltage is then switched by the 'External Vcc Switch' inside the programmer to the EXT-
•
VCC-OUT pins on the 'Target ISP Port' of the programmer.
Typical applications:
Used to control power to a Target System (UUT) which requires an input voltage of > 5.0V.
•
This is typical of many designs where the power supply / regulator circuit on a Target System
may require e.g. 9 – 24V which is then regulated down to eg. 3.3V or 5.0V
Used on the 'ISPnano Series III (ATE)' programmer to switch +12V power to the relay coils
•
ISPnano Programmer
DC-EXT
EXT DC
connector
SWITCH
pin1
DC-IN
Programmer
POWER Input
(DC IN connector
pin 1)
Measure
V
TARGET
Programmer
POWER 0V (DC IN
connector pin 2)
Power 0V
IDC PIN 3+4
IDC PIN 1+2
V
V
TARGET
V
TARGET_REG
V
TPS
Line
RESET
Driver
Circuit
Programmer
Programming
I/O Lines
lines
to Target
System
Signal 0V
Programmer Signal
0V (IDC PIN 5+6)
Target System (UUT)
Target
Voltage Regulator
Vin
circuit
TARGET_REG
Target
IC
R
T
POWER 0V
C
T