AN5426 an external capacitor is added between the RESET pin to ground, the CAP range?

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AN5426 an external capacitor is added between the RESET pin to ground, the CAP range?

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jacky_Tan
NXP Employee
NXP Employee

Despite a capacitor in the reset line is not directly required for the MCU. In some cases, in order to add a further ESD protection,an external capacitor is added between the RESET pin to ground. The values of the pull up resistor and the capacitor must be selected according to the design requirements of the application. Refer to the device datasheet for the minimum RESET pulse value that can be detected for the MCU.

customer down load S32K148 Flash error if it add 0.1uf from Reset pin to GND, need to removed 0.1uf CAP, download code normal.

customer need NXP to provide the recommend CAP range .

@Stephen.du@nxp.com

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danielmartynek
NXP TechSupport
NXP TechSupport

Hi @jacky_Tan,

Can the customer disconnect the external WDOG and test it again?

The capacitor holds the MCU in the system reset longer but it should not cause the MCU to reset itself periodically?

 

BR, Daniel

 

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