Hi Chester Gillon, Thank you for your reply the DC voltage(at SCL line) which i observe on oscilloscope is 'one'(high).and the pull-up resistors also connected on SCL and SDA lines.and this same module PCA8565 works with freescale microcontroller(TWR-K20D72M) i already done interface of this same module with freescale microcontroller and it works fine.but when i interface this same PCA8565 module with MSP-EXP430G2 it not works.please check my code and let me know where i made mistake.
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