Infineon SMU User Manual

SMU

Safety Management Unit

AURIX™ TC2xx Microcontroller Training
V1.0 2019-03

Please read the Important Notice and Warnings at the end of this document

Key Features Customer Benefits

Unified fault management

Recovery timers

› Configurable internal and/or external

reaction for each individually alarm

› Enables monitoring of duration of internal

error handlers

SMU

Safety Management Unit

Key Features Customer Benefits

Highlights

The Safety Management Unit (SMU) is a
central hardware module that collects the
alarms from every hardware safety
mechanisms, as well as the error signals
related to the architecture.

The severity of each alarm can be configure
accordingly with the needs of the application.

SMU

Internal Alarm

Reaction

External

Alarm

Reaction

Alarm Sources/

Safety

Mechanisms

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2019-03-27 Copyright © Infineon Technologies AG 2019. All rights reserved.

SMU

Unified fault management

› With the SMU, pre-defined reaction can be configured individually for each

alarm

› Whenever an input alarm event is detected and the SMU state machine is

in the RUN or FAULT state, the module checks what are the configured
actions to be done

External reaction

• Use Fault Signaling Protocol to

transition from “fault free state” to
“fault state”

• Request Emergency Stop to set

selected pins in reset state

Internal reaction

• Issue Non Maskable Interrupt to
all CPUs

• Issue interrupt to a configurable

set of CPUs

• Issue an application or system
reset

• Issue a CPU reset selectively

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2019-03-27 Copyright © Infineon Technologies AG 2019. All rights reserved.