Sharing boot_cfg lines

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Sharing boot_cfg lines

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jautry
Contributor III

I noted on the eval board that Boot-Cfg input lines to the processor MIMXRT 1062  were shared.  Is it possible to share these lines since they are only accessed at startup for config data?  Is the way to do this is to start with them configured for Boot-Cfg and after boot changing the line configuration?

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Yuri
NXP TechSupport
NXP TechSupport

@jautry 
Hello,

  The default pins state are configured after boot configuration is latched.

Regards,
Yuri

 

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Yuri
NXP TechSupport
NXP TechSupport

@jautry 
Hello,

  Section 9.4.2 (GPIO boot overrides) of the RM contains information about the boot override pins.

https://www.nxp.com/webapp/Download?colCode=IMXRT1060RM

  After boot these pins can be used for other functionality.
Use i.MX Pins tool for possible configurations.

https://www.nxp.com/pages/pins-tool-for-i.mx-application-processors:PINS-TOOL-IMX

Regards,
Yuri.

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jautry
Contributor III

I just want to make sure.  The config tool lists the GPIO as the default at power up but not the config option.  So the default is actually the config option for reading the boot configs and then the mux is executed to direct the pins to proper configuration.  We do not have to specifically define the pin for config option.

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Yuri
NXP TechSupport
NXP TechSupport

@jautry 
Hello,

  The default pins state are configured after boot configuration is latched.

Regards,
Yuri

 

View solution in original post

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