AURIX™ Forum Discussions

[kv193]

Hello.
I read in UM:

-------------------------------------------------------------
9.1.4.1

External Service Requests (ESRx)
The ESR pins can be used in various ways:
• ESR inputs can trigger a reset
• ESR outputs can provide a reset indication
• ESR inputs can trigger a trap request
• ESR pins can be used as general data I/O pins
• ESR inputs can trigger a wake-up from standby mode
-------------------------------------------------------------------

And question is: ESR pins can be used as general data I/O pins? And if "yes", then "how"?

[FD_aurix]

No, ESR0 and ESR1 could not be used as GPIO

[kv193]

Thank you, FD_aurix.

Why UM have this info?:

• ESR pins can be used as general data I/O pins.

Without this info all is correct. But this statement confuse me.

[FD_aurix]

I was not aware about this functionality. You can refers to the UM 9.1.4.1.3 ESR Registers  Checking for the IOCR OUT IN and OMR register.

[MoD · Accepted solution]

Yes, ESRx pins can be configured and used as GPIO but each reset will reconfigure the settings for ESRx (e.g. ESR0 will be driven low during reset).

[kv193]

Ok, I understand this functionality after reset. But how reconfigure ESR0 as GPIO? And what iLLD functions use for that? In third party device ESR0 used for reset one chip and I want reset this chip in application at any time as needed.

[Yuva]

Hello,

The register configuration to make ESR pins to function as GPIO is available in section 9.1.4.1.3 of User Manual part1, refer IOCR.

Thanks.