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Thanks I solved my problem.P1.6 connector that linked pin to the green led on the msp430 causes I2C problem.I took it off and it worked.Thanks again for your reply.

Hello everyone.I am trying to learn I2C device adress of my MPU6050 sensor by using Ardunio I2C scan code in Energia.But although the code doesn't give me any error,on serial monitor I see all registers from 0x01 to 0x7E.I should see one register but I see all register on serial monitor like below... Scanning... I2C device found at address 0x01 ! .... .... .... I2C device found at address 0x7D ! I2C device found at address 0x7E ! done The code that I have used is http://playground.arduino.cc/Main/I2cScanner. I am sure about connections between my sensor and my msp430g2553.I used 4.7k