Dear ST team,
I am working with the ST25DV chip (I use ST25DV_Discovery_Ant_C5 hardware conected to my processor with wires). VDCG is connected to VCC. LPD is High while the device is not active. I set LPD Low when a GPO nterrupt is triggered before communicating with the ST25DV. I want to get an interrupt when a message is posted into the mailbox.
If I only configure the GPO_CTRL_DYN register with RF_PUT_MSG_EN and GPO_EN bits to 1, I never get an interrupt if post a message into the mailbox while LPD is High. (of course, If I set LPD Low beforehand and never reset it, I get a GPO interrupt and I receive the message).
If I set all bits of GPO_CTRL_DYN to 1 with LPD High, then I get an RF_ACTIVITY interrupt at the time when the NFC Reader is near to the ST25DV, but I never get an interrupt when I post a message in the mailbox.
- is it normal ? (If so, I can set LPD Low when the ST25DV detects RF activity so that I will receive the messages posted in the mailbox, but I would like to be sure this is the proper way of doing ...)