what's the mean of set_mode command?

[free1983]

synopsys design-compiler set_mode

Hi,All
there is a command "set_mode" in Synopsys Design Compiler ,the command syntax is :
dc_shell> set_mode {read transparent} U1/U2/core
so, what the mode "read transparent" mean ? does the every cell in the library has this attribute or definded by the customer?
Thanks

 

[23tyagi]

synopsys set_mode

set_mode command is used for the timing analysis of blocks which have multiple operating modes.
like RAM-read ,write .Earlier for timing analysis all modes are enabled and most restrictive arcs were used for analysis.
With this command mode based timing analysis is possible.

 

[free1983]

Thank u for ur reply
does the mode (read or write) defined by the vendor or by customer? can I reset those modes ?
Thanks