Distinguish different types of MIFARE Ultralight

问题:

How to identify different types of MIFARE Ultralight tags?

In document AN10834 Ultralight and Ultralight C differ by the answer from "Auth". What is this "Auth"? There is no description of this function in the datasheets to the chips.

I noticed that Ultralight C and EV1 support GET_VERSION (60h), I sent this request to EV1 card, it does not return anything to me.

回答1:

In order to distinguish MIFARE Ultralight, Ultralight C, Ultralight EV1, and NTAG tags, you would first send a GET_VERSION command:

> 60

If this command succeeds, you know that the tag is an EV1 (or later) tag (e.g. MIFARE Ultralight EV1 or NTAG21x). You can, thus, narrow down the specific tag type by analyzing the resonse to the GET_VERSION command. This will reveal the product type (NTAG or Ultralight EV1) as well as product subtype, product version and storage size (which allows you to determine the exact chip type). See Distinguish NTAG213 from MF0ICU2 for a list of example product identification values.

If the GET_VERSION command fails, you can assume that it is a first generation tag (MIFARE Ultralight, Ultralight C, NTAG203). You can, thus, narrow down the specific tag type by sending an AUTHENTICATE (part 1) command:

> 1A 00

If this command succeeds, you know that the tag is MIFARE Ultralight C.

If this command fails, you can assume that the tag is either Ultralight or NTAG203. In order to distinguish between MIFARE Ultralight and NTAG203, you can try to read pages that do not exist on Ultralight (e.g. read page 41):

> 30 29