diff --git a/blocks/TFFs/TFF.ice b/blocks/TFFs/TFF.ice
index 78f31b0..3d45926 100644
--- a/blocks/TFFs/TFF.ice
+++ b/blocks/TFFs/TFF.ice
@@ -1,9 +1,9 @@
 {
   "version": "1.2",
   "package": {
-    "name": "TFF",
-    "version": "0.3",
-    "description": "System TFF with toggle input: It toogles on every system cycle if the input is active",
+    "name": "TFF-verilog",
+    "version": "0.4",
+    "description": "TFF-verilog. System TFF with toggle input: It toogles on every system cycle if the input is active. Verilog implementation",
     "author": "Juan González-Gómez (Obijuan)",
     "image": "%3Csvg%20width=%22446.564%22%20height=%22323.478%22%20viewBox=%220%200%20118.15346%2085.586967%22%20xmlns=%22http://www.w3.org/2000/svg%22%3E%3Ctext%20style=%22line-height:1.25;-inkscape-font-specification:ubuntu%22%20x=%2217.105%22%20y=%22102.424%22%20font-weight=%22400%22%20font-size=%2243.588%22%20font-family=%22ubuntu%22%20letter-spacing=%220%22%20word-spacing=%220%22%20stroke-width=%222.724%22%20transform=%22translate(3.689%20-56.576)%22%3E%3Ctspan%20x=%2217.105%22%20y=%22102.424%22%20style=%22-inkscape-font-specification:'ubuntu%20Medium'%22%20font-weight=%22500%22%3E1%3C/tspan%3E%3C/text%3E%3Cpath%20d=%22M103.647%2011.233l8.692-8.353-1.016%2027.43-26.866-1.016%208.24-8.128s-6.32-6.66-17.496-6.773c-11.175-.113-17.948%206.209-17.948%206.209l.113-9.256-6.999-3.048S61.317-.282%2075.88.396c14.561.677%2027.768%2010.837%2027.768%2010.837zM44.599%2074.354l-8.692%208.353%201.016-27.43%2026.866%201.016-8.24%208.128s6.32%206.66%2017.496%206.773c11.175.112%2017.948-6.209%2017.948-6.209l-.113%209.256%206.999%203.048s-10.95%208.58-25.511%207.902c-14.562-.677-27.77-10.837-27.77-10.837z%22%20fill=%22green%22%20stroke=%22#000%22%20stroke-width=%22.716%22/%3E%3Ctext%20style=%22line-height:1.25;-inkscape-font-specification:ubuntu%22%20x=%2291.581%22%20y=%22124.887%22%20font-weight=%22400%22%20font-size=%2243.588%22%20font-family=%22ubuntu%22%20letter-spacing=%220%22%20word-spacing=%220%22%20stroke-width=%222.724%22%20transform=%22translate(3.689%20-56.576)%22%3E%3Ctspan%20x=%2291.581%22%20y=%22124.887%22%20style=%22-inkscape-font-specification:'ubuntu%20Medium'%22%20font-weight=%22500%22%3E0%3C/tspan%3E%3C/text%3E%3Cpath%20d=%22M77.094%2046.485l3.003%2011.933-7.058-10.182%22%20fill=%22#ccc%22%20stroke=%22#000%22%20stroke-width=%22.716%22%20stroke-linecap=%22round%22%20stroke-linejoin=%22round%22/%3E%3Cpath%20d=%22M75.915%2040.345l-5.845-10.93%203.91-1.687-.938-2.172-12.672%205.47.938%202.172%203.693-1.594%204.253%2011.738s-2.772%201.786-2.574%204.168c.198%202.383%201.397%202.835%201.203%202.954l14.342-6.211s-.723-2.568-2.38-3.311c-1.657-.743-3.93-.597-3.93-.597z%22%20fill=%22red%22%20stroke=%22#000%22%20stroke-width=%22.716%22%20stroke-linecap=%22round%22%20stroke-linejoin=%22round%22/%3E%3Cg%20transform=%22matrix(1.18163%200%200%201.18163%20-101.312%20-19.89)%22%20stroke=%22green%22%20stroke-linecap=%22round%22%3E%3Ccircle%20cx=%22100.602%22%20cy=%2273.815%22%20r=%2214.559%22%20fill=%22#ececec%22%20stroke-width=%22.608%22%20stroke-linejoin=%22round%22/%3E%3Cpath%20d=%22M106.978%2082.142h-3.353V63.316H97.54v18.678h-3.652%22%20fill=%22none%22%20stroke-width=%221.521%22/%3E%3C/g%3E%3C/svg%3E",
     "otid": 1618503523961
@@ -12,19 +12,6 @@
     "board": "alhambra-ii",
     "graph": {
       "blocks": [
-        {
-          "id": "b9359b10-b14f-4dd7-adf9-3f4f22bc65e6",
-          "type": "basic.outputLabel",
-          "data": {
-            "blockColor": "yellow",
-            "name": "clk",
-            "oldBlockColor": "fuchsia"
-          },
-          "position": {
-            "x": 456,
-            "y": -160
-          }
-        },
         {
           "id": "ca7c5f10-efb6-43f9-9364-52d751fc0bc6",
           "type": "basic.input",
@@ -33,60 +20,19 @@
             "clock": true
           },
           "position": {
-            "x": 80,
-            "y": -112
-          }
-        },
-        {
-          "id": "0a772657-8018-424d-8f04-75d3ffff3692",
-          "type": "basic.inputLabel",
-          "data": {
-            "blockColor": "yellow",
-            "name": "clk",
-            "pins": [
-              {
-                "index": "0",
-                "name": "",
-                "value": ""
-              }
-            ],
-            "virtual": true
-          },
-          "position": {
-            "x": 232,
-            "y": -112
+            "x": 328,
+            "y": -80
           }
         },
         {
           "id": "4e8afe74-8f38-4873-97ee-f7585d99a4aa",
           "type": "basic.output",
           "data": {
-            "name": "",
-            "virtual": false
-          },
-          "position": {
-            "x": 800,
-            "y": -112
-          }
-        },
-        {
-          "id": "f20a4359-8546-4dda-aa5c-d08bfe4724a0",
-          "type": "basic.outputLabel",
-          "data": {
-            "name": "next",
-            "blockColor": "fuchsia",
-            "virtual": true,
-            "pins": [
-              {
-                "index": "0",
-                "name": "NULL",
-                "value": "NULL"
-              }
-            ]
+            "name": ""
           },
           "position": {
-            "x": 464,
-            "y": -64
+            "x": 904,
+            "y": -8
           }
         },
         {
@@ -94,79 +40,11 @@
           "type": "basic.input",
           "data": {
             "name": "",
-            "virtual": true,
-            "pins": [
-              {
-                "index": "0",
-                "name": "NULL",
-                "value": "NULL"
-              }
-            ],
             "clock": false
           },
           "position": {
-            "x": 80,
-            "y": -40
-          }
-        },
-        {
-          "id": "81f5e1f9-e867-4639-98b5-e12f7551751d",
-          "type": "basic.inputLabel",
-          "data": {
-            "name": "toggle",
-            "blockColor": "fuchsia",
-            "virtual": true,
-            "pins": [
-              {
-                "index": "0",
-                "name": "NULL",
-                "value": "NULL"
-              }
-            ]
-          },
-          "position": {
-            "x": 224,
-            "y": -40
-          }
-        },
-        {
-          "id": "8f321a4f-979f-46f9-b40f-524e6bc0008a",
-          "type": "basic.inputLabel",
-          "data": {
-            "name": "next",
-            "blockColor": "fuchsia",
-            "virtual": true,
-            "pins": [
-              {
-                "index": "0",
-                "name": "NULL",
-                "value": "NULL"
-              }
-            ]
-          },
-          "position": {
-            "x": 880,
-            "y": 16
-          }
-        },
-        {
-          "id": "a66e0e19-f794-47df-b52e-c663ff7fa3e2",
-          "type": "basic.outputLabel",
-          "data": {
-            "name": "toggle",
-            "blockColor": "fuchsia",
-            "virtual": true,
-            "pins": [
-              {
-                "index": "0",
-                "name": "NULL",
-                "value": "NULL"
-              }
-            ]
-          },
-          "position": {
-            "x": 464,
-            "y": 32
+            "x": 320,
+            "y": 64
           }
         },
         {
@@ -178,416 +56,89 @@
             "local": false
           },
           "position": {
-            "x": 600,
-            "y": -232
+            "x": 624,
+            "y": -248
           }
         },
         {
-          "id": "1f324b9b-a8a8-43b9-9c34-2207a3ea75a5",
-          "type": "3676a00f3a70e406487ed14b901daf3e4984e63d",
-          "position": {
-            "x": 736,
-            "y": 16
+          "id": "60198e6c-e8ec-433b-a4fb-55bed9afcc45",
+          "type": "basic.code",
+          "data": {
+            "ports": {
+              "in": [
+                {
+                  "name": "clk"
+                },
+                {
+                  "name": "t"
+                }
+              ],
+              "out": [
+                {
+                  "name": "q"
+                }
+              ]
+            },
+            "params": [
+              {
+                "name": "INI"
+              }
+            ],
+            "code": "//-- Initial value\nreg qi = INI;\n\nalways @(posedge clk)\nbegin\n \n //-- check the toogle input\n if (t == 1'b1)\n   qi <= ~ qi;\n \nend\n\n//-- Connect the register with the\n//-- output\nassign q = qi;\n"
           },
-          "size": {
-            "width": 96,
-            "height": 64
-          }
-        },
-        {
-          "id": "6e8b3562-d62b-487d-b3d1-829589f86c5f",
-          "type": "407d80e33e1e8f0d8cbc561cc519af27a522cb6b",
           "position": {
-            "x": 600,
-            "y": -80
+            "x": 496,
+            "y": -120
           },
           "size": {
-            "width": 96,
-            "height": 96
+            "width": 352,
+            "height": 288
           }
         }
       ],
       "wires": [
         {
           "source": {
-            "block": "ca7c5f10-efb6-43f9-9364-52d751fc0bc6",
-            "port": "out"
-          },
-          "target": {
-            "block": "0a772657-8018-424d-8f04-75d3ffff3692",
-            "port": "inlabel"
-          },
-          "vertices": []
-        },
-        {
-          "source": {
-            "block": "b9359b10-b14f-4dd7-adf9-3f4f22bc65e6",
-            "port": "outlabel"
+            "block": "915bebf3-8f1a-4547-8056-fe3e75c77022",
+            "port": "constant-out"
           },
           "target": {
-            "block": "6e8b3562-d62b-487d-b3d1-829589f86c5f",
-            "port": "df0c1bb1-f8ef-49f3-b71f-9384c29a9735"
+            "block": "60198e6c-e8ec-433b-a4fb-55bed9afcc45",
+            "port": "INI"
           }
         },
         {
           "source": {
-            "block": "fcbd52d3-d1b8-4cd4-befc-e045d20b91e4",
+            "block": "ca7c5f10-efb6-43f9-9364-52d751fc0bc6",
             "port": "out"
           },
           "target": {
-            "block": "81f5e1f9-e867-4639-98b5-e12f7551751d",
-            "port": "inlabel"
-          }
-        },
-        {
-          "source": {
-            "block": "a66e0e19-f794-47df-b52e-c663ff7fa3e2",
-            "port": "outlabel"
-          },
-          "target": {
-            "block": "6e8b3562-d62b-487d-b3d1-829589f86c5f",
-            "port": "58d2c88e-2434-438f-986b-0f5b9c3654ca"
-          }
-        },
-        {
-          "source": {
-            "block": "1f324b9b-a8a8-43b9-9c34-2207a3ea75a5",
-            "port": "664caf9e-5f40-4df4-800a-b626af702e62"
-          },
-          "target": {
-            "block": "8f321a4f-979f-46f9-b40f-524e6bc0008a",
-            "port": "inlabel"
+            "block": "60198e6c-e8ec-433b-a4fb-55bed9afcc45",
+            "port": "clk"
           }
         },
         {
           "source": {
-            "block": "f20a4359-8546-4dda-aa5c-d08bfe4724a0",
-            "port": "outlabel"
+            "block": "fcbd52d3-d1b8-4cd4-befc-e045d20b91e4",
+            "port": "out"
           },
           "target": {
-            "block": "6e8b3562-d62b-487d-b3d1-829589f86c5f",
-            "port": "adf3a6ae-71e2-43dd-b504-c2cdbc14dab7"
+            "block": "60198e6c-e8ec-433b-a4fb-55bed9afcc45",
+            "port": "t"
           }
         },
         {
           "source": {
-            "block": "6e8b3562-d62b-487d-b3d1-829589f86c5f",
-            "port": "4e8afe74-8f38-4873-97ee-f7585d99a4aa"
-          },
-          "target": {
-            "block": "1f324b9b-a8a8-43b9-9c34-2207a3ea75a5",
-            "port": "18c2ebc7-5152-439c-9b3f-851c59bac834"
-          },
-          "vertices": []
-        },
-        {
-          "source": {
-            "block": "6e8b3562-d62b-487d-b3d1-829589f86c5f",
-            "port": "4e8afe74-8f38-4873-97ee-f7585d99a4aa"
+            "block": "60198e6c-e8ec-433b-a4fb-55bed9afcc45",
+            "port": "q"
           },
           "target": {
             "block": "4e8afe74-8f38-4873-97ee-f7585d99a4aa",
             "port": "in"
           }
-        },
-        {
-          "source": {
-            "block": "915bebf3-8f1a-4547-8056-fe3e75c77022",
-            "port": "constant-out"
-          },
-          "target": {
-            "block": "6e8b3562-d62b-487d-b3d1-829589f86c5f",
-            "port": "be33796a-a109-4ab0-a53b-dd6ec67587cd"
-          }
         }
       ]
     }
   },
-  "dependencies": {
-    "3676a00f3a70e406487ed14b901daf3e4984e63d": {
-      "package": {
-        "name": "NOT",
-        "version": "2.0",
-        "description": "NOT gate (Verilog implementation)",
-        "author": "Jesús Arroyo, Juan González",
-        "image": "%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20width=%22317.651%22%20height=%22194.058%22%20version=%221%22%3E%3Cpath%20d=%22M69.246%204l161.86%2093.027-161.86%2093.031V4z%22%20fill=%22none%22%20stroke=%22#000%22%20stroke-width=%228%22%20stroke-linejoin=%22round%22/%3E%3Cellipse%20cx=%22253.352%22%20cy=%2296.736%22%20rx=%2221.393%22%20ry=%2221.893%22%20fill=%22none%22%20stroke=%22#000%22%20stroke-width=%228%22%20stroke-linecap=%22round%22%20stroke-linejoin=%22round%22/%3E%3Cpath%20d=%22M4.057%2097.49h65.262m205.796%200h38.48%22%20fill=%22none%22%20stroke=%22#000%22%20stroke-width=%228%22%20stroke-linecap=%22round%22/%3E%3Ctext%20style=%22line-height:125%25%22%20x=%2281.112%22%20y=%22111.734%22%20transform=%22scale(.99532%201.0047)%22%20font-weight=%22400%22%20font-size=%2249.675%22%20font-family=%22sans-serif%22%20letter-spacing=%220%22%20word-spacing=%220%22%20fill=%22#00f%22%3E%3Ctspan%20x=%2281.112%22%20y=%22111.734%22%20style=%22-inkscape-font-specification:'sans-serif%20Bold'%22%20font-weight=%22700%22%3ENot%3C/tspan%3E%3C/text%3E%3C/svg%3E"
-      },
-      "design": {
-        "graph": {
-          "blocks": [
-            {
-              "id": "18c2ebc7-5152-439c-9b3f-851c59bac834",
-              "type": "basic.input",
-              "data": {
-                "name": ""
-              },
-              "position": {
-                "x": 112,
-                "y": 72
-              }
-            },
-            {
-              "id": "664caf9e-5f40-4df4-800a-b626af702e62",
-              "type": "basic.output",
-              "data": {
-                "name": ""
-              },
-              "position": {
-                "x": 560,
-                "y": 72
-              }
-            },
-            {
-              "id": "5365ed8c-e5db-4445-938f-8d689830ea5c",
-              "type": "basic.code",
-              "data": {
-                "code": "//-- NOT Gate\nassign q = ~a;\n\n",
-                "params": [],
-                "ports": {
-                  "in": [
-                    {
-                      "name": "a"
-                    }
-                  ],
-                  "out": [
-                    {
-                      "name": "q"
-                    }
-                  ]
-                }
-              },
-              "position": {
-                "x": 256,
-                "y": 48
-              },
-              "size": {
-                "width": 256,
-                "height": 104
-              }
-            },
-            {
-              "id": "e3bb41e3-1944-4946-9675-c2dbe2e49fcf",
-              "type": "basic.info",
-              "data": {
-                "info": "Input",
-                "readonly": true
-              },
-              "position": {
-                "x": 128,
-                "y": 32
-              },
-              "size": {
-                "width": 80,
-                "height": 40
-              }
-            },
-            {
-              "id": "8408dd5f-945f-4a89-9790-7752813d4e91",
-              "type": "basic.info",
-              "data": {
-                "info": "Output",
-                "readonly": true
-              },
-              "position": {
-                "x": 576,
-                "y": 40
-              },
-              "size": {
-                "width": 80,
-                "height": 40
-              }
-            }
-          ],
-          "wires": [
-            {
-              "source": {
-                "block": "18c2ebc7-5152-439c-9b3f-851c59bac834",
-                "port": "out"
-              },
-              "target": {
-                "block": "5365ed8c-e5db-4445-938f-8d689830ea5c",
-                "port": "a"
-              }
-            },
-            {
-              "source": {
-                "block": "5365ed8c-e5db-4445-938f-8d689830ea5c",
-                "port": "q"
-              },
-              "target": {
-                "block": "664caf9e-5f40-4df4-800a-b626af702e62",
-                "port": "in"
-              }
-            }
-          ]
-        }
-      }
-    },
-    "407d80e33e1e8f0d8cbc561cc519af27a522cb6b": {
-      "package": {
-        "name": "DFF-verilog",
-        "version": "0.1",
-        "description": "DFF. D Flip-flop. Verilog implementation",
-        "author": "Juan González-Gómez (Obijuan)",
-        "image": "%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20width=%22216.379%22%20height=%22279.911%22%20viewBox=%220%200%2057.25032%2074.059853%22%3E%3Cg%20stroke=%22#000%22%20stroke-width=%221.442%22%20stroke-linecap=%22round%22%20stroke-linejoin=%22round%22%3E%3Cpath%20d=%22M41.506%2040.152l13.608%2016.672-6.918-20.534%22%20fill=%22#ccc%22%20stroke-width=%221.0924880399999999%22/%3E%3Cpath%20d=%22M34.122%2032.088L24.89%2012.475l-6.45%203.724-2.07-3.583L37.276.546l2.07%203.584-6.093%203.517%2012.03%2018.223s5.4-2.025%208.536.74c3.136%202.766%202.52%204.92%202.887%204.772L33.017%2045.02s-2.849-3.695-2.16-6.795c.687-3.1%203.265-6.137%203.265-6.137z%22%20fill=%22red%22%20stroke-width=%221.0924880399999999%22/%3E%3C/g%3E%3Cg%20transform=%22translate(-93.518%20-22.665)%20scale(1.09073)%22%20stroke=%22green%22%20stroke-linecap=%22round%22%3E%3Ccircle%20cx=%22100.602%22%20cy=%2273.815%22%20r=%2214.559%22%20fill=%22#ececec%22%20stroke-width=%22.608%22%20stroke-linejoin=%22round%22/%3E%3Cpath%20d=%22M106.978%2082.142h-3.353V63.316H97.54v18.678h-3.652%22%20fill=%22none%22%20stroke-width=%221.521%22/%3E%3C/g%3E%3C/svg%3E",
-        "otid": 1594812046378
-      },
-      "design": {
-        "graph": {
-          "blocks": [
-            {
-              "id": "df0c1bb1-f8ef-49f3-b71f-9384c29a9735",
-              "type": "basic.input",
-              "data": {
-                "name": "",
-                "clock": true
-              },
-              "position": {
-                "x": 128,
-                "y": 424
-              }
-            },
-            {
-              "id": "adf3a6ae-71e2-43dd-b504-c2cdbc14dab7",
-              "type": "basic.input",
-              "data": {
-                "name": "d",
-                "clock": false
-              },
-              "position": {
-                "x": 128,
-                "y": 536
-              }
-            },
-            {
-              "id": "4e8afe74-8f38-4873-97ee-f7585d99a4aa",
-              "type": "basic.output",
-              "data": {
-                "name": ""
-              },
-              "position": {
-                "x": 824,
-                "y": 536
-              }
-            },
-            {
-              "id": "58d2c88e-2434-438f-986b-0f5b9c3654ca",
-              "type": "basic.input",
-              "data": {
-                "name": "load",
-                "clock": false
-              },
-              "position": {
-                "x": 128,
-                "y": 648
-              }
-            },
-            {
-              "id": "be33796a-a109-4ab0-a53b-dd6ec67587cd",
-              "type": "basic.constant",
-              "data": {
-                "name": "",
-                "value": "0",
-                "local": false
-              },
-              "position": {
-                "x": 488,
-                "y": 280
-              }
-            },
-            {
-              "id": "5bffd6ef-bb9d-4d3f-a4f0-f91c6040ddc5",
-              "type": "basic.code",
-              "data": {
-                "ports": {
-                  "in": [
-                    {
-                      "name": "clk"
-                    },
-                    {
-                      "name": "d"
-                    },
-                    {
-                      "name": "load"
-                    }
-                  ],
-                  "out": [
-                    {
-                      "name": "q"
-                    }
-                  ]
-                },
-                "params": [
-                  {
-                    "name": "INI"
-                  }
-                ],
-                "code": "//-- Initial value\nreg q = INI;\n\nalways @(posedge clk)\nbegin\n \n //-- When load is active\n //-- the input data is captured\n if (load == 1'b1)\n   q <= d;\n \nend\n"
-              },
-              "position": {
-                "x": 320,
-                "y": 400
-              },
-              "size": {
-                "width": 424,
-                "height": 336
-              }
-            }
-          ],
-          "wires": [
-            {
-              "source": {
-                "block": "df0c1bb1-f8ef-49f3-b71f-9384c29a9735",
-                "port": "out"
-              },
-              "target": {
-                "block": "5bffd6ef-bb9d-4d3f-a4f0-f91c6040ddc5",
-                "port": "clk"
-              }
-            },
-            {
-              "source": {
-                "block": "adf3a6ae-71e2-43dd-b504-c2cdbc14dab7",
-                "port": "out"
-              },
-              "target": {
-                "block": "5bffd6ef-bb9d-4d3f-a4f0-f91c6040ddc5",
-                "port": "d"
-              }
-            },
-            {
-              "source": {
-                "block": "58d2c88e-2434-438f-986b-0f5b9c3654ca",
-                "port": "out"
-              },
-              "target": {
-                "block": "5bffd6ef-bb9d-4d3f-a4f0-f91c6040ddc5",
-                "port": "load"
-              }
-            },
-            {
-              "source": {
-                "block": "5bffd6ef-bb9d-4d3f-a4f0-f91c6040ddc5",
-                "port": "q"
-              },
-              "target": {
-                "block": "4e8afe74-8f38-4873-97ee-f7585d99a4aa",
-                "port": "in"
-              }
-            },
-            {
-              "source": {
-                "block": "be33796a-a109-4ab0-a53b-dd6ec67587cd",
-                "port": "constant-out"
-              },
-              "target": {
-                "block": "5bffd6ef-bb9d-4d3f-a4f0-f91c6040ddc5",
-                "port": "INI"
-              }
-            }
-          ]
-        }
-      }
-    }
-  }
+  "dependencies": {}
 }
\ No newline at end of file
diff --git a/examples/TESTs/TFFs/TFF/Alhambra-II/01-manual-testing.ice b/examples/TESTs/TFFs/TFF/Alhambra-II/01-manual-testing.ice
index 91e411a..516bf51 100644
--- a/examples/TESTs/TFFs/TFF/Alhambra-II/01-manual-testing.ice
+++ b/examples/TESTs/TFFs/TFF/Alhambra-II/01-manual-testing.ice
@@ -92,8 +92,8 @@
           }
         },
         {
-          "id": "21d91ade-04be-470d-b111-8098a99a1735",
-          "type": "05b06ebe84ae854b224676998d9ded6c30d3e4ac",
+          "id": "896aaf78-c3e6-4ac5-95b9-d820f90f59ae",
+          "type": "6ac7ddf463b070e3a2e40ffee0481f3a5a643dd4",
           "position": {
             "x": 1016,
             "y": 48
@@ -107,7 +107,7 @@
       "wires": [
         {
           "source": {
-            "block": "21d91ade-04be-470d-b111-8098a99a1735",
+            "block": "896aaf78-c3e6-4ac5-95b9-d820f90f59ae",
             "port": "4e8afe74-8f38-4873-97ee-f7585d99a4aa"
           },
           "target": {
@@ -121,7 +121,7 @@
             "port": "constant-out"
           },
           "target": {
-            "block": "21d91ade-04be-470d-b111-8098a99a1735",
+            "block": "896aaf78-c3e6-4ac5-95b9-d820f90f59ae",
             "port": "915bebf3-8f1a-4547-8056-fe3e75c77022"
           }
         },
@@ -141,7 +141,7 @@
             "port": "997db8c4-b772-49d8-83e7-4427aff720e6"
           },
           "target": {
-            "block": "21d91ade-04be-470d-b111-8098a99a1735",
+            "block": "896aaf78-c3e6-4ac5-95b9-d820f90f59ae",
             "port": "fcbd52d3-d1b8-4cd4-befc-e045d20b91e4"
           }
         }
@@ -10251,11 +10251,11 @@
         }
       }
     },
-    "05b06ebe84ae854b224676998d9ded6c30d3e4ac": {
+    "6ac7ddf463b070e3a2e40ffee0481f3a5a643dd4": {
       "package": {
-        "name": "TFF-block",
-        "version": "0.3",
-        "description": "TFF-block. System TFF with toggle input: It toogles on every system cycle if the input is active. Block implementation",
+        "name": "TFF-verilog",
+        "version": "0.4",
+        "description": "TFF-verilog. System TFF with toggle input: It toogles on every system cycle if the input is active. Verilog implementation",
         "author": "Juan González-Gómez (Obijuan)",
         "image": "%3Csvg%20width=%22446.564%22%20height=%22323.478%22%20viewBox=%220%200%20118.15346%2085.586967%22%20xmlns=%22http://www.w3.org/2000/svg%22%3E%3Ctext%20style=%22line-height:1.25;-inkscape-font-specification:ubuntu%22%20x=%2217.105%22%20y=%22102.424%22%20font-weight=%22400%22%20font-size=%2243.588%22%20font-family=%22ubuntu%22%20letter-spacing=%220%22%20word-spacing=%220%22%20stroke-width=%222.724%22%20transform=%22translate(3.689%20-56.576)%22%3E%3Ctspan%20x=%2217.105%22%20y=%22102.424%22%20style=%22-inkscape-font-specification:'ubuntu%20Medium'%22%20font-weight=%22500%22%3E1%3C/tspan%3E%3C/text%3E%3Cpath%20d=%22M103.647%2011.233l8.692-8.353-1.016%2027.43-26.866-1.016%208.24-8.128s-6.32-6.66-17.496-6.773c-11.175-.113-17.948%206.209-17.948%206.209l.113-9.256-6.999-3.048S61.317-.282%2075.88.396c14.561.677%2027.768%2010.837%2027.768%2010.837zM44.599%2074.354l-8.692%208.353%201.016-27.43%2026.866%201.016-8.24%208.128s6.32%206.66%2017.496%206.773c11.175.112%2017.948-6.209%2017.948-6.209l-.113%209.256%206.999%203.048s-10.95%208.58-25.511%207.902c-14.562-.677-27.77-10.837-27.77-10.837z%22%20fill=%22green%22%20stroke=%22#000%22%20stroke-width=%22.716%22/%3E%3Ctext%20style=%22line-height:1.25;-inkscape-font-specification:ubuntu%22%20x=%2291.581%22%20y=%22124.887%22%20font-weight=%22400%22%20font-size=%2243.588%22%20font-family=%22ubuntu%22%20letter-spacing=%220%22%20word-spacing=%220%22%20stroke-width=%222.724%22%20transform=%22translate(3.689%20-56.576)%22%3E%3Ctspan%20x=%2291.581%22%20y=%22124.887%22%20style=%22-inkscape-font-specification:'ubuntu%20Medium'%22%20font-weight=%22500%22%3E0%3C/tspan%3E%3C/text%3E%3Cpath%20d=%22M77.094%2046.485l3.003%2011.933-7.058-10.182%22%20fill=%22#ccc%22%20stroke=%22#000%22%20stroke-width=%22.716%22%20stroke-linecap=%22round%22%20stroke-linejoin=%22round%22/%3E%3Cpath%20d=%22M75.915%2040.345l-5.845-10.93%203.91-1.687-.938-2.172-12.672%205.47.938%202.172%203.693-1.594%204.253%2011.738s-2.772%201.786-2.574%204.168c.198%202.383%201.397%202.835%201.203%202.954l14.342-6.211s-.723-2.568-2.38-3.311c-1.657-.743-3.93-.597-3.93-.597z%22%20fill=%22red%22%20stroke=%22#000%22%20stroke-width=%22.716%22%20stroke-linecap=%22round%22%20stroke-linejoin=%22round%22/%3E%3Cg%20transform=%22matrix(1.18163%200%200%201.18163%20-101.312%20-19.89)%22%20stroke=%22green%22%20stroke-linecap=%22round%22%3E%3Ccircle%20cx=%22100.602%22%20cy=%2273.815%22%20r=%2214.559%22%20fill=%22#ececec%22%20stroke-width=%22.608%22%20stroke-linejoin=%22round%22/%3E%3Cpath%20d=%22M106.978%2082.142h-3.353V63.316H97.54v18.678h-3.652%22%20fill=%22none%22%20stroke-width=%221.521%22/%3E%3C/g%3E%3C/svg%3E",
         "otid": 1618503523961
@@ -10263,19 +10263,6 @@
       "design": {
         "graph": {
           "blocks": [
-            {
-              "id": "b9359b10-b14f-4dd7-adf9-3f4f22bc65e6",
-              "type": "basic.outputLabel",
-              "data": {
-                "blockColor": "yellow",
-                "name": "clk",
-                "oldBlockColor": "fuchsia"
-              },
-              "position": {
-                "x": 464,
-                "y": -224
-              }
-            },
             {
               "id": "ca7c5f10-efb6-43f9-9364-52d751fc0bc6",
               "type": "basic.input",
@@ -10284,20 +10271,8 @@
                 "clock": true
               },
               "position": {
-                "x": 0,
-                "y": -104
-              }
-            },
-            {
-              "id": "0a772657-8018-424d-8f04-75d3ffff3692",
-              "type": "basic.inputLabel",
-              "data": {
-                "blockColor": "yellow",
-                "name": "clk"
-              },
-              "position": {
-                "x": 152,
-                "y": -104
+                "x": 328,
+                "y": -80
               }
             },
             {
@@ -10307,68 +10282,8 @@
                 "name": ""
               },
               "position": {
-                "x": 1040,
-                "y": -64
-              }
-            },
-            {
-              "id": "f20a4359-8546-4dda-aa5c-d08bfe4724a0",
-              "type": "basic.outputLabel",
-              "data": {
-                "name": "output",
-                "blockColor": "darkgreen",
-                "virtual": true,
-                "pins": [
-                  {
-                    "index": "0",
-                    "name": "NULL",
-                    "value": "NULL"
-                  }
-                ]
-              },
-              "position": {
-                "x": 296,
-                "y": -64
-              }
-            },
-            {
-              "id": "8f321a4f-979f-46f9-b40f-524e6bc0008a",
-              "type": "basic.inputLabel",
-              "data": {
-                "name": "output",
-                "blockColor": "darkgreen",
-                "virtual": true,
-                "pins": [
-                  {
-                    "index": "0",
-                    "name": "NULL",
-                    "value": "NULL"
-                  }
-                ]
-              },
-              "position": {
-                "x": 736,
-                "y": -64
-              }
-            },
-            {
-              "id": "6289de91-cf70-4c94-af49-303c69b742b4",
-              "type": "basic.outputLabel",
-              "data": {
-                "name": "output",
-                "blockColor": "darkgreen",
-                "virtual": true,
-                "pins": [
-                  {
-                    "index": "0",
-                    "name": "NULL",
-                    "value": "NULL"
-                  }
-                ]
-              },
-              "position": {
-                "x": 896,
-                "y": -64
+                "x": 904,
+                "y": -8
               }
             },
             {
@@ -10379,32 +10294,8 @@
                 "clock": false
               },
               "position": {
-                "x": 0,
-                "y": -32
-              }
-            },
-            {
-              "id": "81f5e1f9-e867-4639-98b5-e12f7551751d",
-              "type": "basic.inputLabel",
-              "data": {
-                "name": "toggle",
-                "blockColor": "fuchsia"
-              },
-              "position": {
-                "x": 144,
-                "y": -32
-              }
-            },
-            {
-              "id": "a66e0e19-f794-47df-b52e-c663ff7fa3e2",
-              "type": "basic.outputLabel",
-              "data": {
-                "name": "toggle",
-                "blockColor": "fuchsia"
-              },
-              "position": {
-                "x": 440,
-                "y": 32
+                "x": 320,
+                "y": 64
               }
             },
             {
@@ -10416,221 +10307,12 @@
                 "local": false
               },
               "position": {
-                "x": 600,
-                "y": -176
-              }
-            },
-            {
-              "id": "1f324b9b-a8a8-43b9-9c34-2207a3ea75a5",
-              "type": "3676a00f3a70e406487ed14b901daf3e4984e63d",
-              "position": {
-                "x": 432,
-                "y": -64
-              },
-              "size": {
-                "width": 96,
-                "height": 64
-              }
-            },
-            {
-              "id": "5c5222ea-6e9c-481a-8115-6193c3d80b91",
-              "type": "8a23ffd0491010ff595493182b82c722bd6902d7",
-              "position": {
-                "x": 600,
-                "y": -80
-              },
-              "size": {
-                "width": 96,
-                "height": 96
-              }
-            },
-            {
-              "id": "f1fe976c-6ec3-416a-9f98-8201127ad477",
-              "type": "basic.info",
-              "data": {
-                "info": "Change the current  \noutput",
-                "readonly": true
-              },
-              "position": {
-                "x": 408,
-                "y": -120
-              },
-              "size": {
-                "width": 168,
-                "height": 48
-              }
-            }
-          ],
-          "wires": [
-            {
-              "source": {
-                "block": "ca7c5f10-efb6-43f9-9364-52d751fc0bc6",
-                "port": "out"
-              },
-              "target": {
-                "block": "0a772657-8018-424d-8f04-75d3ffff3692",
-                "port": "inlabel"
-              },
-              "vertices": []
-            },
-            {
-              "source": {
-                "block": "b9359b10-b14f-4dd7-adf9-3f4f22bc65e6",
-                "port": "outlabel"
-              },
-              "target": {
-                "block": "5c5222ea-6e9c-481a-8115-6193c3d80b91",
-                "port": "df0c1bb1-f8ef-49f3-b71f-9384c29a9735"
-              }
-            },
-            {
-              "source": {
-                "block": "fcbd52d3-d1b8-4cd4-befc-e045d20b91e4",
-                "port": "out"
-              },
-              "target": {
-                "block": "81f5e1f9-e867-4639-98b5-e12f7551751d",
-                "port": "inlabel"
-              }
-            },
-            {
-              "source": {
-                "block": "a66e0e19-f794-47df-b52e-c663ff7fa3e2",
-                "port": "outlabel"
-              },
-              "target": {
-                "block": "5c5222ea-6e9c-481a-8115-6193c3d80b91",
-                "port": "58d2c88e-2434-438f-986b-0f5b9c3654ca"
-              }
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-            {
-              "source": {
-                "block": "6289de91-cf70-4c94-af49-303c69b742b4",
-                "port": "outlabel"
-              },
-              "target": {
-                "block": "4e8afe74-8f38-4873-97ee-f7585d99a4aa",
-                "port": "in"
-              }
-            },
-            {
-              "source": {
-                "block": "f20a4359-8546-4dda-aa5c-d08bfe4724a0",
-                "port": "outlabel"
-              },
-              "target": {
-                "block": "1f324b9b-a8a8-43b9-9c34-2207a3ea75a5",
-                "port": "18c2ebc7-5152-439c-9b3f-851c59bac834"
-              }
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-            {
-              "source": {
-                "block": "5c5222ea-6e9c-481a-8115-6193c3d80b91",
-                "port": "4e8afe74-8f38-4873-97ee-f7585d99a4aa"
-              },
-              "target": {
-                "block": "8f321a4f-979f-46f9-b40f-524e6bc0008a",
-                "port": "inlabel"
-              }
-            },
-            {
-              "source": {
-                "block": "915bebf3-8f1a-4547-8056-fe3e75c77022",
-                "port": "constant-out"
-              },
-              "target": {
-                "block": "5c5222ea-6e9c-481a-8115-6193c3d80b91",
-                "port": "be33796a-a109-4ab0-a53b-dd6ec67587cd"
-              }
-            },
-            {
-              "source": {
-                "block": "1f324b9b-a8a8-43b9-9c34-2207a3ea75a5",
-                "port": "664caf9e-5f40-4df4-800a-b626af702e62"
-              },
-              "target": {
-                "block": "5c5222ea-6e9c-481a-8115-6193c3d80b91",
-                "port": "adf3a6ae-71e2-43dd-b504-c2cdbc14dab7"
-              }
-            }
-          ]
-        }
-      }
-    },
-    "8a23ffd0491010ff595493182b82c722bd6902d7": {
-      "package": {
-        "name": "DFF-verilog",
-        "version": "0.2",
-        "description": "DFF. D Flip-flop. Verilog implementation",
-        "author": "Juan González-Gómez (Obijuan)",
-        "image": "%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20width=%22216.379%22%20height=%22279.911%22%20viewBox=%220%200%2057.25032%2074.059853%22%3E%3Cg%20stroke=%22#000%22%20stroke-width=%221.442%22%20stroke-linecap=%22round%22%20stroke-linejoin=%22round%22%3E%3Cpath%20d=%22M41.506%2040.152l13.608%2016.672-6.918-20.534%22%20fill=%22#ccc%22%20stroke-width=%221.0924880399999999%22/%3E%3Cpath%20d=%22M34.122%2032.088L24.89%2012.475l-6.45%203.724-2.07-3.583L37.276.546l2.07%203.584-6.093%203.517%2012.03%2018.223s5.4-2.025%208.536.74c3.136%202.766%202.52%204.92%202.887%204.772L33.017%2045.02s-2.849-3.695-2.16-6.795c.687-3.1%203.265-6.137%203.265-6.137z%22%20fill=%22red%22%20stroke-width=%221.0924880399999999%22/%3E%3C/g%3E%3Cg%20transform=%22translate(-93.518%20-22.665)%20scale(1.09073)%22%20stroke=%22green%22%20stroke-linecap=%22round%22%3E%3Ccircle%20cx=%22100.602%22%20cy=%2273.815%22%20r=%2214.559%22%20fill=%22#ececec%22%20stroke-width=%22.608%22%20stroke-linejoin=%22round%22/%3E%3Cpath%20d=%22M106.978%2082.142h-3.353V63.316H97.54v18.678h-3.652%22%20fill=%22none%22%20stroke-width=%221.521%22/%3E%3C/g%3E%3C/svg%3E",
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-                "name": "d",
-                "clock": false
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-            {
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-              "data": {
-                "name": "load",
-                "clock": false
-              },
-              "position": {
-                "x": 128,
-                "y": 648
-              }
-            },
-            {
-              "id": "be33796a-a109-4ab0-a53b-dd6ec67587cd",
-              "type": "basic.constant",
-              "data": {
-                "name": "",
-                "value": "0",
-                "local": false
-              },
-              "position": {
-                "x": 488,
-                "y": 280
+                "x": 624,
+                "y": -248
               }
             },
             {
-              "id": "5bffd6ef-bb9d-4d3f-a4f0-f91c6040ddc5",
+              "id": "60198e6c-e8ec-433b-a4fb-55bed9afcc45",
               "type": "basic.code",
               "data": {
                 "ports": {
@@ -10639,10 +10321,7 @@
                       "name": "clk"
                     },
                     {
-                      "name": "d"
-                    },
-                    {
-                      "name": "load"
+                      "name": "t"
                     }
                   ],
                   "out": [
@@ -10656,68 +10335,58 @@
                     "name": "INI"
                   }
                 ],
-                "code": "//-- Initial value\nreg qi = INI;\n\nalways @(posedge clk)\nbegin\n \n //-- When load is active\n //-- the input data is captured\n if (load == 1'b1)\n   qi <= d;\n \nend\n\n//-- Connect the register with the\n//-- output\nassign q = qi;\n"
+                "code": "//-- Initial value\nreg qi = INI;\n\nalways @(posedge clk)\nbegin\n \n //-- check the toogle input\n if (t == 1'b1)\n   qi <= ~ qi;\n \nend\n\n//-- Connect the register with the\n//-- output\nassign q = qi;\n"
               },
               "position": {
-                "x": 320,
-                "y": 400
+                "x": 496,
+                "y": -120
               },
               "size": {
-                "width": 424,
-                "height": 336
+                "width": 352,
+                "height": 288
               }
             }
           ],
           "wires": [
             {
               "source": {
-                "block": "df0c1bb1-f8ef-49f3-b71f-9384c29a9735",
-                "port": "out"
+                "block": "915bebf3-8f1a-4547-8056-fe3e75c77022",
+                "port": "constant-out"
               },
               "target": {
-                "block": "5bffd6ef-bb9d-4d3f-a4f0-f91c6040ddc5",
-                "port": "clk"
+                "block": "60198e6c-e8ec-433b-a4fb-55bed9afcc45",
+                "port": "INI"
               }
             },
             {
               "source": {
-                "block": "adf3a6ae-71e2-43dd-b504-c2cdbc14dab7",
+                "block": "ca7c5f10-efb6-43f9-9364-52d751fc0bc6",
                 "port": "out"
               },
               "target": {
-                "block": "5bffd6ef-bb9d-4d3f-a4f0-f91c6040ddc5",
-                "port": "d"
+                "block": "60198e6c-e8ec-433b-a4fb-55bed9afcc45",
+                "port": "clk"
               }
             },
             {
               "source": {
-                "block": "58d2c88e-2434-438f-986b-0f5b9c3654ca",
+                "block": "fcbd52d3-d1b8-4cd4-befc-e045d20b91e4",
                 "port": "out"
               },
               "target": {
-                "block": "5bffd6ef-bb9d-4d3f-a4f0-f91c6040ddc5",
-                "port": "load"
+                "block": "60198e6c-e8ec-433b-a4fb-55bed9afcc45",
+                "port": "t"
               }
             },
             {
               "source": {
-                "block": "5bffd6ef-bb9d-4d3f-a4f0-f91c6040ddc5",
+                "block": "60198e6c-e8ec-433b-a4fb-55bed9afcc45",
                 "port": "q"
               },
               "target": {
                 "block": "4e8afe74-8f38-4873-97ee-f7585d99a4aa",
                 "port": "in"
               }
-            },
-            {
-              "source": {
-                "block": "be33796a-a109-4ab0-a53b-dd6ec67587cd",
-                "port": "constant-out"
-              },
-              "target": {
-                "block": "5bffd6ef-bb9d-4d3f-a4f0-f91c6040ddc5",
-                "port": "INI"
-              }
             }
           ]
         }
diff --git a/wiki/images/tff-12.png b/wiki/images/tff-12.png
index b9325a5..7adc28b 100644
Binary files a/wiki/images/tff-12.png and b/wiki/images/tff-12.png differ