Hello,
Do you have either measured or calculated ISO14443 A/B air interface timing like you have done for the ISO15693? I am currently using the trf7960 eval board.
I would like to know the fastest possible read time for example the ISO15693 Read Single Block total time = 4.56mSec taken from your 7658.ISO_15693_timing_JDW_05_27_2011.pdf
Thanks
Vlad
Vlad -
sorry - the ISO15693 command of Read Single Block is not available with any ISO144443A or B device. Instead, they would be using an ISO7816-4 command like 'Read Binary', after being activated and selected with the ISO14443-3 commands.
So - the request is a little bit complicated - but just for ballpark idea, the ISO14443 devices in general are going to be at a minimum about 5 times faster than the ISO15693 devices. But, the lower level activation and selection would all happen at 106kbps most likely, as TypeA only allows a baud rate change in the ISO14443-4 layer (for Type A is is done with the PPS Request/PPS Response sequence, for Type B, this would happen in Layer 3 with the ATTRIB command.
anyway - what could be estimated here is the amount of data you want to retireve with the baud rates available/possible with card you are wanting to use. (106, 212, 424, 848kbps)
then you could add on the other protocol overhead bytes required for the activaiton and selection and come close to how long it would take.
BR-
Josh
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to add to this, please see attached spreadsheet which i started here for you to use - this should help you out and if you are using the ISO standards along with it, then it should be easier to figure out how long your processes will take. Let me know if you get stuck, etc. I did not have a ton of time to do this, but next i would be adding the layer 4 times.Note all three sheets in here.
3386.ISO14443_times.xlsx
Hello Josh,
Let's say we only need to read 4 different tags and we know the ID of each tag (either programing a value or reading the ID). Anti-collision will never happen since we can make sure the sensor will never read more than 1 card/tag at the same time. Preferable choosing the fastest data rate can be beneficial (848kbps). I can control the distance between the tag and sensor (within 4 inches). Pretty much a controlled environment. Choosing an ISO14443 command with the least amount of header bits and data bits to identify that particular card out of the 4. I'm not sure which command would be the fastest in 14443 A or B? With all this can we still be faster than ISO15693?
I saw your spreadsheet and to me looks like the fastest speed at 106Kpbs (14443B) is 5mS+ 2.93mS = 7.93mS. This seems way slower than the ISO15693 at 4.56mS.
Can you tell me with the 14443 optimum setup at 848kbps can we get that 5 times faster than 15693 including header bits? I am not familiar with the ISO14443 protocol at this point.
Can we write to memory blocks like we can using the 15693 tags?