I2C doesn't transmit the data correctly

[elshat san]

I am trying to send value 0x75 using I2c but when i check the value using logical analyzer i found it 0x74.
and when i tried to send 0x77 i found it equal to 0x76.
any help please !

used board nRF-52840
SDK version 17.1.0

[qwertynoon]

Hi. It is a problem of last bit. What is the circuit of connection? What devices?

[elshat san]

i am using nRF-52840 and ICM (6-axis motion sensor)

[qwertynoon]

What about pull-up resistors? You need to pull-up at last 10kOhm

[elshat san]

qwertynoon said:

pull-up resistors

i depend on the resistor that in the pca10056 board i think it equal 4.7kOhm

[Kenneth]

Can it be that you are mixing that the 8th bit is the Read/Write bit, and that the 7bit address is actually the 7 most significant bits of the first byte? 

E.g.Write operation:

E.g Read operation:

Kenneth

[elshat san]

the address of the sensor is 0x69 and i want to read from address 0x75.
the first byte is correctly sent but the second byte is not.
this is my logical analyzer data

[Kenneth]

Can you share the file? I think this is from saleae.

Kenneth