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why the NT3H1101 is sending NACK unstead of ACK?

Question asked by PengfeiLi PengfeiLi on Aug 2, 2018

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?





nt3h1101 IIC