About BQ2013H initialization and NAC register

Hello, Mr. 
Recently, I also learn BQ2013H chip, experiencing some of the following questions, please give me your answer: 
1 NAC register on the issue, I would like to read the NAC (available capacity registers) by which the value of simple microcontroller to accurately display the power, but the problem is I do not know how to read out the data is converted into electricity that I want data? 
2 About BQ2013H initialization problem, I tried many methods, but without success, it seems there is no talk of a detailed user manual. 
These are my questions, looking to get your answer. Thank you.