Target System Powers The Programmer; Overview; Hardware Setup - Target System Powers The Programmer - Equinox Systems EPSILON5 MKII User Manual

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Datasheet of EPSILON5-A1 - ISP PORTABLE PROGRAMMER USB
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3.5 Target System powers the Programmer

3.5.1 Overview

In this scenario, the programmer is powered from the Target System via the ISP cable. The Jumper
J9 is fitted which connects the Target Vcc voltage (V_TVCC) to CON1 VIN. This powers the internal
circuitry of the programmer.
Explanation of operation:
•
When the ISP Cable is connected from the programmer to a Target System and the Target
system power supply is switched ON, the programmer will power up.
•
When the ISP Cable is disconnected from the Target System or the Target System is powered
OFF, the Programmer will power OFF.
•
The programmer should only be connected/disconnect from the Target system when the Target
power supply is switched OFF

3.5.2 Hardware Setup - Target System powers the Programmer

Please note
•
The external voltage applied to the programmer must be between 3.1 and 5.0V!
•
The Target System must be able to supply the worst case current required during a
programming operation – see section 1.5.3.
•
A 6V2 5W zener diode is internally connected across the programmer supply to protect
against over-voltage.
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EPSILON5 MKII Programmer - User Guide V1.12 – 1
st
August 2007