Hi All,
I am quite new the NFC so forgive me if I may miss some details or lack the understanding about some of the standards.
Regardless, what I need to do is emulate a tag that is readable with an iPhone using NDEF for one way communication. The payloads need to be ~1KB though I may be able to get away with 512B as a last resort. The only issue I have is it must be held is ram, not eeprom as I will be writing to the tag, on average, every 5s.
The alternative to this is to use a transceiver or similar that instead of holding the data, simply requires a "pass through".
I looked into quite a few series of ICs that NXP has to offer and came up with the following notes:
- PN5180 - In App note for devboard shows an example of how to emulate a 1024byte type 4 tag. BGA 0.35mm pitch, ouch.
- PN512 - Example for RPi-v1 shows 256byte example. Perhaps use a newer IC? This could be painful to set up and test. Do I need the S2C crypto chip to operate? Has a 64Byte fifo buffer, so likely just a pass through style.
- NTA5332 - Tested well, though only allows for 256 bytes sram mirrored
- PN7360/PN7362/PN7462 - full micro with nfc embedded - seems a bit overkill and that IC package, ouch!
- PN5331
- PN7120
- PN7150
- CLRC663 - transciever
- PN532 - Tested poorly, despite being heavily devloped by the arduino teams, continuous pains trying to emulate a tag. max APDU size is 256, might as well use the NTH2h2 with 256 sram bytes...
- NHS3100/3152 - small Micro with 128 word sram (mirrored). Is the word size 32bit? Thus 512Bytes mirrored? Possible bbackup solution.
