TI Based EVM: If the EVM under debug is TI-based, then
the flow follows this branch in the flow chart.
Locate User Guide Associated With EVM: All TI-based EVMs
have a User's Guide or Quick Start Guide that detail the features of the EVM as
well as components that are critical to the correct operation of the EVM.
Reviewing these up front assists in the debug process (explained in this
document).
Board Has Isolation Implemented: Using the reference
guide from the previous step, or other documentation, if not a TI-produced EVM,
determine if the board under debug has isolation circuitry implemented or
not.
Ensure Components Are Correct For ISO Enable: Referring
back to the documentation for the EVM, ensure that any switches, jumpers, or
shunts are correctly populated to achieve the desired isolation state for the
EVM.
Confirm Both EVM And Emulation Have Power Where
Applicable: In order to achieve proper isolation of the power planes
between the local and high power domains, isolators are used to connect the two
planes and allow the emulation signals to get to the MCU. Since there are
separate power planes there must be two paths for powering each plane. Ensure
both planes have power to connect to your device through emulation.
Check That Isolation Meets End Use Requirements: While
not an essential check for initial system debug, it is important to be familiar
with the isolation devices that are used such that it is understood if they meet
the requirements of the end system. While TI EVMs comprehend this to their end
application, if there are TI EVMs mixed with custom EVMs, this can still be a
necessary check.
Did Isolation\Emulation Reference Come From A TI Based
EVM: Many times the isolation and emulation circuits from a TI EVM are
re-used for a custom design. While electrically sound, what is often overlooked
is that the emulation chipset itself still needs to be programmed. For a
TI-based EVM, this occurs before the EVM is sold, on a custom board; however,
this process still needs to be comprehended in the production flow.