Changes between Initial Version and Version 1 of Sff1Vbe

Timestamp:

Apr 8, 2007, 2:18:41 PM (17 years ago)

Author:

alain

Comment:

--

Sff1Vbe

@@ +1 @@
+{{{
+ENTITY sff1_x4 IS
+GENERIC (
+  CONSTANT area          : NATURAL := 4500;
+  CONSTANT cin_ck        : NATURAL := 8;
+  CONSTANT cin_i         : NATURAL := 8;
+  CONSTANT rdown_ck_q    : NATURAL := 800;
+  CONSTANT rup_ck_q      : NATURAL := 890;
+  CONSTANT taf_ck_q      : NATURAL := 500;
+  CONSTANT tar_ck_q      : NATURAL := 500;
+  CONSTANT thf_i_ck      : NATURAL := 0;
+  CONSTANT thr_i_ck      : NATURAL := 0;
+  CONSTANT tsf_i_ck      : NATURAL := 585;
+  CONSTANT tsr_i_ck      : NATURAL := 476;
+  CONSTANT transistors   : NATURAL := 26
+);
+PORT (
+  ck     : IN  BIT;
+  i      : IN  BIT;
+  q      : OUT BIT;
+  vdd    : IN  BIT;
+  vss    : IN  BIT
+);
+END sff1_x4;
+
+ARCHITECTURE vbe OF sff1_x4 IS
+  SIGNAL sff_m   : REG_BIT REGISTER;
+
+BEGIN
+  ASSERT (vdd AND NOT (vss))
+  REPORT "power supply is missing on sff1_x4"
+  SEVERITY WARNING;
+
+  label0 : BLOCK ((ck AND NOT (ck'STABLE)) = '1')
+  BEGIN
+    sff_m <= GUARDED i;
+  END BLOCK label0;
+
+  q <= sff_m after 1700 ps;
+END;
+}}}