what configuration to be set to enter the ST25R3911B chip in low power mode & should be wakeup if RFID card is detected & give the interrupt on IRQ pin to wake up the external MCU?

[RP]

In example code in library STM32CubeExpansion_NFC5_V1.3.0 for STM32L476RG-Nucleo, after pressing user BUTTON, it enters in low power mode. When it should be wake up, after again pressing user BUTTON or After detecting RFID tag? What is the program flow?

[Ulysses HERNIOSUS · Accepted solution]

Hi,

the User button switches between using the low-power wake-up mode of the ST25R3911B and not using it.

The actually wake-up will be performed by detecting as per selected mode using capacitive plates or detuning of the LC tank (short enable of the field). Interrupt is sent to MCU which could used to wake the MCU.

Ulysses