SPNZ187 Datasheet, PDF (21/36 Pages) Texas Instruments – This document describes the known exceptions to the functional specifications for the device.

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DEVICE#B056 — Error flags are incorrectly set in the Error Signaling Module upon a device warm reset for
modules in core power domains that are disabled
DEVICE#B056
Error flags are incorrectly set in the Error Signaling Module upon a device warm
reset for modules in core power domains that are disabled
Severity
Expected Behavior
Issue
Conditions
Implications
Workaround(s)
High
Once a core power domain is disabled (turned off) no error must be indicated to the
ESM from a module in this power domain.
When a core power domain is disabled, a device warm reset causes error signals to be
sent to the ESM that appear to be from the power domain that has been disabled. This
is caused due to the incorrect power domain isolation implemented on these error
signals. All such error signals are connected to ESM group1 channels.
The behavior is not dependent on any particular operating condition.
If the application has enabled the generation of interrupts or the assertion of the
nERROR output when any flag gets set in the ESM module's group1 status registers,
then the CPU will receive an interrupt and/or the nERROR pin will be driven for an error
condition ascribed to a module that is in a core power domain that has been disabled.
When a core power domain is disabled, the application must ensure that any error signal
related to a module within this power domains is not configured to generate an interrupt
to the CPU or assert the device nERROR output. Alternately, the application could clear
the ESM group1 status flags upon each device warm reset condition before it enables
interrupts and nERROR drive features for the ESM group1 channels.
SPNZ187 – September 2012
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