Changes between Version 2 and Version 3 of AccuVbe

Timestamp:

Apr 8, 2007, 1:32:30 PM (17 years ago)

Author:

alain

Comment:

--

AccuVbe

@@ -1 +1 @@
 {{{
--- Multiplexeur 4 bits
+-- Registre accumulateur 4 bits
 
-ENTITY mux IS
-  PORT
-    (
-      cmd       : IN  BIT;
-      x         : IN  BIT_VECTOR(3 downto 0);
-      y         : IN  BIT_VECTOR(3 downto 0);
-      q         : OUT BIT_VECTOR(3 downto 0);
-      vdd       : IN  bit;
-      vss       : IN  bit);
-END mux;
+ENTITY accu4 IS
+PORT (
+  ck     : IN  BIT;
+  d      : IN  BIT_VECTOR(3 DOWNTO 0);
+  q      : OUT BIT_VECTOR(3 DOWNTO 0);
+  vdd    : IN  BIT;
+  vss    : IN  BIT);
+END accu4;
 
-ARCHITECTURE vbe OF mux IS
+ARCHITECTURE vbe OF accu4 IS
+
+SIGNAL x : REG_VECTOR(3 DOWNTO 0) REGISTER;
 
 BEGIN
 
-WITH cmd SELECT
-  q <= x WHEN "0",
-       y WHEN "1";
+  q <= x;
+  label0 : BLOCK(ck='1' AND NOT ck 'STABLE)
+  BEGIN
+    x <= GUARDED d;
+  END BLOCK;
 
-END;
+END vbe;
 }}}