CR95HF FAST_READ Command using NTAG213 (14443A)

[TGree.2]

We are using the CR95HF over SPI and communicating with a single NTAG213 tag.

I can successfully configure the reader and read 4 pages of user memory reliably using the READ command:

00 04 03 30 04 28. // Reads 16 bytes from Addr 0x04

We would like to read multiple blocks using the FAST_READ command but the following command structure gives an 0x87 error;

00 04 04 3A 04 07 28

Any idea why this doesn't work?

[Brian TIDAL · Accepted solution]

Hi,

I've tried the 04 04 3A 04 07 28 command on my side and I've received:

80 15 30 30 30 30 32 38 FF FF 06 FF FF FF 07 FF FF FF A4 A5 08 00 00

Can you check the Frame Delay Time in your protocolSelect command? It should be at least T_ACK/NACK (see the Tag Datasheet).

See also https://community.st.com/s/question/0D50X0000AFqKjkSQF/why-does-my-cr95hf-respond-with-0x87-timeout-or-no-tag-after-successfully-writing-to-a-ntag216-nfc-forum-type-2-compliant-tag

Rgds

BT

[TGree.2]

The increased T_ACK helped - thank you!

Regards

Tony