I am using MSP430FR5949 (master Mode) to control the ADT7420. However, ADT7420 sent back a not acknowledge bit to master after the serial bus address byte was transmitted.
I cannot read or write anything to IC ADT7420. The master just repeated to transmit the address byte.
the address byte is 0x48 because A0 and A1 connected to ground.
This is the testing result.