|
|
Sensitivity List
Formal Definition:
A list of signals a process is sensitive to.
Simplified Syntax:
(signal_name, signal_name, . . .)
Description:
The sensitivity list is a compact way of specifying the set of signals, events on which may resume a process. A sensitivity list is specified right after the keyword process (Example 1).
DFF : process (CLK,RST)
begin
if RST = '1'
then Q <= '0';
elsif (CLK'event) and (CLK = '1')
then Q <= D;
end if;
end process DFF;
-- DFF : process
-- begin
-- if RST = '1'
-- then Q <= '0';
-- elsif (CLK'event) and (CLK = '1')
-- then Q <= D;
-- end if;
-- wait on RST, CLK;
-- end process DFF;
Here, the process is sensitive to the RST and CLK signals, i.e. an event on any of these signals will cause the process to resume. This process is equivalent to the one described in the comment section
E-mail: 
info@telesys.ru
