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Hardware Reference Manual for i.MX53 Quick Start
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3.21. PCB   Shorting   Traces  
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On ? the ? Quick ? Start ? PCB, ? there ? are ? 29 ? sets ? of ? standard ? footprints ? with ? a ? copper ? trace ? between ? them ? to ?
short ? the ? two ? pads ? together. ? The ? PCB ? is ? produced ? with ? these ? pads ? unpopulated. ? These ? shorting ? traces ?
are ? placed ? throughout ? the ? PCB ? at ? locations ? in ? line ? with ? major ? power ? rails ? and ? critical ? components. ? The ?
purpose ? of ? these ? shorting ? traces ? it ? to ? allow ? the ? skilled ? developer ? to ? manually ? cut ? the ? trace ? between ? the ?
pads ? to ? either: ?
1) Isolate ? power ? to ? major ? subsystems ? or ? components. ?
2) Install ? small ? value ? precision ? resistors ? to ? measure ? current ? consumption ? of ? major ? subsystems. ?
3) Or ? reconfigure ? power ? sources ? to ? subsystems ? or ? components ? using ? wires ? soldered ? to ? the ? pads. ?
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To ? restore ? a ? shorting ? trace ? back ? to ? normal ? after ? the ? trace ? is ? cut, ? it ? is ? only ? necessary ? to ? solder ? a ? Zero ? Ohm ?
resistor ? to ? the ? pads. ?
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4. Quick   Start   Board   Connectors   and   Expansion   Port  
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The ? Quick ? Start ? board ? provides ? a ? number ? of ? connectors ? for ? a ? variety ? of ? inputs ? and ? outputs ? to ? and ? from ?
the ? board. ? The ? following ? subsections ? describe ? these ? connections ? in ? detail. ?
Freescale Semiconductor
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Hardware User Guide for i.MX53 Quick Start Board,
Preliminary Rev 0.91
15
PUBI – Public Use Business Information ?
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