NFC tags read/write operations on low level

Hi,
I know this is little bit offtopic question - but since you are experts in the area I will try to ask you probably a pretty simple question:
1/ I would like to know which protocol is used for the read/write operations to the NFC tags are used. According to my understanding after the tag is placed on the NFC reader (NFC phone, USB reader), it is powered and set to the ready state. Then the application protocol for read/write operation is used. As I think the exact format and the content of commands used for read/write is not specified in ISO 14443 and it is dependent on a tag hardware/manufacturer and will be different for FeliCa/Mifare/Innovision/etc. tags, so there is no way how to handle NFC tags read/write operations with the single implementation. Is that assumption correct?
2/ Are there any tags, which supports the APDU 7816-4 commands for read/write operations?
Thank you for reply
Kind regards,
STeN

hello,
you have to read the NFC forum specs. all of this will be better explained than by me.
more than one protocol are used according the the contactless front end configuration and abilities. It includes ISO14443-A, ISO14443-B and Felica. Sometimes other protocols are also available, for example Innovatron (not Innovision lol)
Mifare is not a protocol, it is a line of NXP products. These products use the lower layers of the ISO14443-A protocol specification.
There are 4 types of tags
1) using the lower layers of ISO14443-A
2) using the lower layers of ISO14443-B
3) something related to felica?
not sure exactly about these 3, you have to read the specs. Everything is clearly understandable, not like ETSI.
4) something using ISO7816-4 commands on top of ISO14443 A or B or others. You have SELECT, READ BINARY, UPDATE BINARY. You can implement that using javacard, I did it and it works. You need two binary files, that can be hardcoded.
Regards
Sebastien

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NFC tags read/write operations on low level

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