TMS320F28379D: Range and Format

You can refer the following

https://en.wikipedia.org/wiki/Q_(number_format)#:~:text=Definition-,Texas%20Instruments%20version,a%20pair%20of%20numbers%20m%20.&text=Thus%20Q12%20means%20a%20signed,unsigned%20binary%20fixed%2Dpoint%20format.

/cfs-file/__key/communityserver-discussions-components-files/171/6136.IQmath_5F00_Quickstart.pdf

You can also search this E2E forum for more info.

Hello Ramesh,

Could you please share what is the meaning of this range 80000000-7FFFFFFF? What actual decimal values are represented there?
Regards,
Carlo

These are 32 bit numbers. Its MSB represents its sign. 0000 0000 through 7FFF FFFF represents all positive numbers from 0, 1 ,2,...., ((2^31)-1). Negative numbers start from FFFF FFFF, FFFF FFFE,......., 1000 0000. In signed domain, FFFF FFFF represents -1 and 1000 0000 represents -2^31. If you subtract 1 from 0, you get -1. You can see the same thing happen here, it will result in a carry bit as well which is not of concern for the scope of this discussion.

Hello Ramesh,

Does 8000000 - 7FFFFFFF means (2^31 - (2^31)-1) ? That's 2,147,483,648 to 2,147,483,647 ?
Regards,
Carlo