Texas Instruments TMS320C54x, User Manual

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Understanding Memory Widths
10-9 Hex Conversion Utility Description
10.4 Understanding Memory Widths
The hex conversion utility makes your memory architecture more flexible by
allowing you to specify memory and ROM widths. In order to use the hex
conversion utility,
you must understand how the utility treats word widths. Four
widths are important in the conversion process: target width, data width,
memory width, and ROM width. The terms target word, data word, memory
word and ROM word, refer to a word of such a width.
Figure 10–2 illustrates the three separate and distinct phases of the hex
conversion utility’s process flow.
Figure 10–2. Hex Conversion Utility Process Flow
Raw data in COFF files is repre-
sented in target-width-sized
words. For ’C54x this is 16 bits.
The target width is fixed and
cannot be changed.
Phase III
Phase II
Phase I
Output file(s)
(i.e. Intel, Tektronix, etc..).
according to the specified format
and are written to a file(s)
specified by the –romwidth option
broken up according to the size
The memwidth-sized words are
–memwidth option.
according to size specified by the
representation is divided into words
The data-width-sized internal
by the default data width (16 bits).
truncated to the size specified
The raw data in the COFF file is
COFF input file