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Everybody knows that NFC technology (Near Field Communication), developed for the implementation of projects based on the reading of the tag through last generation smartphone devices, works with HF 13,56 MHz, and particularly, it satisfies all requirements to belong to ISO 14443 standard.
However, in October 2015 , NFC Forum (the institution that has the purpose to standardize and regulate the implementation of NFC technology) officially established the parameters for the memorization of information inside ISO15693 chips; this operation is called “Type 5 Tag Operation Specification” .This choice pursues the aim to allow to read ISO15693 and ISO14443 tag through mobile devices (as smartphones) without limiting the user choice about the use of the chip.
Concretely, the intention is to develop a technology called NFC-V, that would allow to NFC readers to communicate also with tags belonging to ISO15693 standard; this fact would imply a reduction of the reading distance (few centimeters reading distance, as NFC 14443 tags) and an improvement of the tag-device communication speed.
Anyway, the situation is still evolving because currently there’s no rule that forces the smartphones NFC chip manufacturer to integrate the Type 5, limiting the obligation to Type 1, Type 2, Type 3 and Type 4.
At the moment, there are many smartphone devices that are capable to read ISO 15693 tags, but this condition is not regulated , therefore the choice to allow the ISO15693 reading is up to the smartphone manufacturer: this situation, obviously, doesn’t guarantee the needed stability that would permit to customers to develop NFC projects using ISO15693 tags with the certainty that the project could be durable and sustainable. Therefore, our suggestion is that to use ISO14443 (NFC compliant) chips; the use of ISO15693 chips must be limited to some project in which the use of smarthone device is a mere integration of a system that involves the using also, and especially, of fixed devices with reading distance exceeding 10 cm.