-order MS -romwidth 16是指什么意思

就是设定rom格式为16bit

参考一下下面的网页，虽然是针对MSP430的，但是本质是一样的

http://software-dl.ti.com/ccs/esd/documents/ccs_hex-utility.html#hex-output-files 

Memory width is the physical width (in bits) of the memory system, which is usually the same width as the target processor width, (ie) a 16-bit processor has a 16-bit memory architecture. However, some applications may require target words to be broken into multiple, consecutive, and narrower memory words. By default, the hex conversion utility sets memory width to the target width, but this can be changed using the --memwidth option.

ROM width determines how the hex utility partitions the data into output files. In older hex programmers, ROM width was used to specify the physical width (in bits) of each ROM device. After the object file data is mapped to the memory words, the memory words are broken into one or more output files. Most modern flash programmers don't require a specific ROM width, but it is best to check if the programmer imposes any restrictions.

The values specified for memwidth and romwidth determine the number of hex output files:

If memory width ≥ ROM width: number of files = memory width ÷ ROM width
If memory width < ROM width: number of files = 1