why the NT3H1101 is sending NACK unstead of ACK?

[836455032]

hello everyone, I am using the NTAG NT3H1101  with MTK2502 and trying to interface it with I2C. i am having a problem with NTAG.First the MCU send  start single and  the slave address(0xaa), i should receive an ACK from the NTAG. but, the NATG is just holding high  the 9th clock.

can you please tell me why the NTAG is not ACK?

Thanks!!

[Jonathan_Iglesias]

Dear PengfeiLi PengfeiLi,

please check the following thread https://community.nxp.com/thread/456513  and tell me if this helps you solve your problem if not please let me know.

Have a great day !
BR

Jonathan