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author | whitequark <whitequark@whitequark.org> | 2018-12-21 01:26:08 +0000 |
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committer | whitequark <whitequark@whitequark.org> | 2018-12-21 23:04:31 +0000 |
commit | 182d84ad54cff315e7afb07f5353a477e4c410f4 (patch) | |
tree | 50cae921a04ddb9f1bf928b0ed2d380cc2c7d240 /manual | |
parent | c04908c99740e616cae454aa6a5d7a3dd13af2fa (diff) | |
download | yosys-182d84ad54cff315e7afb07f5353a477e4c410f4.tar.gz yosys-182d84ad54cff315e7afb07f5353a477e4c410f4.tar.bz2 yosys-182d84ad54cff315e7afb07f5353a477e4c410f4.zip |
manual: make description of $meminit ports match reality.
Diffstat (limited to 'manual')
-rw-r--r-- | manual/CHAPTER_CellLib.tex | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/manual/CHAPTER_CellLib.tex b/manual/CHAPTER_CellLib.tex index 65a79020f..d40a600ed 100644 --- a/manual/CHAPTER_CellLib.tex +++ b/manual/CHAPTER_CellLib.tex @@ -274,13 +274,25 @@ edge if this parameter is {\tt 1'b0}. The cell with the higher integer value in this parameter wins a write conflict. \end{itemize} -The {\tt \$meminit} cells have an address input \B{ADDR} and a data input \B{DATA}. Both of the inputs -must resolve to a constant for synthesis to succeed. If two {\tt \$meminit} cells have the same -\B{MEMID} parameter and \B{ADDR} input, the contents of that memory at that address is undefined. +The {\tt \$meminit} cells have an address input \B{ADDR} and a data input \B{DATA}, with the width +of the \B{DATA} port equal to \B{WIDTH} parameter times \B{WORDS} parameter. Both of the inputs +must resolve to a constant for synthesis to succeed. \begin{itemize} \item \B{MEMID} \\ The name of the RTLIL::Memory object that is associated with this initialization cell. + +\item \B{ABITS} \\ +The number of address bits (width of the \B{ADDR} input port). + +\item \B{WIDTH} \\ +The number of data bits per memory location. + +\item \B{WORDS} \\ +The number of consecutive memory locations initialized by this cell. + +\item \B{PRIORITY} \\ +The cell with the higher integer value in this parameter wins an initialization conflict. \end{itemize} The HDL frontend models a memory using RTLIL::Memory objects and asynchronous |