CONFIG_BT_PER_ADV_SYNC_MAX is set to max 64, where does this limit come from, HW or SW?

[jakkra]

Hi, I'm wondering about the limit of max value 64 for CONFIG_BT_PER_ADV_SYNC_MAX.
Where does this value come from? I'd like to sync with more devices, is that possible or do I need to implement logic to start/stop tracking devices so I "rotate" which 64 devices I sync with? We are using the NRF52833 but may move to NRF5340. Is it a HW or SW limitation?

https://docs.zephyrproject.org/latest/reference/kconfig/CONFIG_BT_PER_ADV_SYNC_MAX.html?highlight=64

Thanks