| 7 | | A partir des netlist '''VALIDEES''' du coeur du circuit et du circuit complet c'est à dire coeur + plots, il est possible de passer à la réalisation en masques du circuit par le ''routage''. Ensuite il est possible d'obtenir les caractéristiques de ce circuit comme son encombrement, le nombre de transistors et sa fréquence de fonctionnement |
| | 7 | * Utiliser les outils de placement et routage. |
| | 8 | * Vérifier la validité du routage. |
| | 9 | == Exercice(s) == |
| | 10 | === Exercice 1-Placement === |
| | 11 | La première étape consiste à placer les plots puis le coeur. |
| | 12 | ==== Question 1 ==== |
| | 13 | Exécutez le script suivant amd_chip.py en ayant pris soin de comprendre le contenu de ce fichier |
| | 14 | {{{ |
| | 15 | #!/usr/bin/python |
| | 16 | |
| | 17 | from stratus import * |
| | 18 | |
| | 19 | class amd_chip ( Model ) : |
| | 20 | |
| | 21 | def Interface ( self ) : |
| | 22 | |
| | 23 | self.cke = CkIn ( "cke") |
| | 24 | self.cin = SignalIn ( "cin", 1 ) |
| | 25 | self.cout = SignalOut ( "cout", 1 ) |
| | 26 | self.np = SignalOut ( "np", 1 ) |
| | 27 | self.ng = SignalOut ( "ng", 1 ) |
| | 28 | self.ovr = SignalOut ( "ovr", 1 ) |
| | 29 | self.zero = SignalOut ( "zero", 1 ) |
| | 30 | self.signe = SignalOut ( "signe", 1 ) |
| | 31 | self.r0 = TriState ( "r0", 1 ) |
| | 32 | self.r3 = TriState ( "r3", 1 ) |
| | 33 | self.q0 = TriState ( "q0", 1 ) |
| | 34 | self.q3 = TriState ( "q3", 1 ) |
| | 35 | self.a = SignalIn ( "a", 4 ) |
| | 36 | self.b = SignalIn ( "b", 4 ) |
| | 37 | self.d = SignalIn ( "d", 4 ) |
| | 38 | self.i = SignalIn ( "i", 9 ) |
| | 39 | self.noe = SignalIn ( "noe", 1 ) |
| | 40 | self.y = TriState ( "y", 4 ) |
| | 41 | |
| | 42 | self.vdd = VddIn ( "vdd" ) |
| | 43 | self.vss = VssIn ( "vss" ) |
| | 44 | self.vdde = VddIn ( "vdde" ) |
| | 45 | self.vsse = VssIn ( "vsse" ) |
| | 46 | |
| | 47 | |
| | 48 | def Netlist ( self ) : |
| | 49 | |
| | 50 | cin_from_pads = Signal ( "cin_from_pads", 1 ) |
| | 51 | cout_to_pads = Signal ( "cout_to_pads", 1 ) |
| | 52 | np_to_pads = Signal ( "np_to_pads", 1 ) |
| | 53 | ng_to_pads = Signal ( "ng_to_pads", 1 ) |
| | 54 | ovr_to_pads = Signal ( "ovr_to_pads", 1 ) |
| | 55 | zero_to_pads = Signal ( "zero_to_pads", 1 ) |
| | 56 | shift_r = Signal ( "shift_r", 1 ) |
| | 57 | shift_l = Signal ( "shift_l", 1 ) |
| | 58 | signe_to_pads = Signal ( "signe_to_pads", 1 ) |
| | 59 | r0_to_pads = Signal ( "r0_to_pads", 1 ) |
| | 60 | r3_to_pads = Signal ( "r3_to_pads", 1 ) |
| | 61 | r0_from_pads = Signal ( "r0_from_pads", 1 ) |
| | 62 | r3_from_pads = Signal ( "r3_from_pads", 1 ) |
| | 63 | q0_to_pads = Signal ( "q0_to_pads", 1 ) |
| | 64 | q3_to_pads = Signal ( "q3_to_pads", 1 ) |
| | 65 | q0_from_pads = Signal ( "q0_from_pads", 1 ) |
| | 66 | q3_from_pads = Signal ( "q3_from_pads", 1 ) |
| | 67 | ck_ring = Signal ( "ck_ring", 1 ) |
| | 68 | a_from_pads = Signal ( "a_from_pads", 4 ) |
| | 69 | b_from_pads = Signal ( "b_from_pads", 4 ) |
| | 70 | d_from_pads = Signal ( "d_from_pads", 4 ) |
| | 71 | i_from_pads = Signal ( "i_from_pads", 9 ) |
| | 72 | y_to_pads = Signal ( "y_to_pads", 4 ) |
| | 73 | noe_from_pads = Signal ( "noe_from_pads", 1 ) |
| | 74 | y_oe = Signal ( "y_oe", 1 ) |
| | 75 | self.ckc = Signal ( "ckc", 1 ) |
| | 76 | |
| | 77 | |
| | 78 | self.coeur = Inst ( "coeur" |
| | 79 | , "coeur" |
| | 80 | , map = { 'cin_from_pads' : cin_from_pads |
| | 81 | , 'cout_to_pads' : cout_to_pads |
| | 82 | , 'np_to_pads' : np_to_pads |
| | 83 | , 'ng_to_pads' : ng_to_pads |
| | 84 | , 'ovr_to_pads' : ovr_to_pads |
| | 85 | , 'signe_to_pads' : signe_to_pads |
| | 86 | , 'zero_to_pads' : zero_to_pads |
| | 87 | , 'shift_r' : shift_r |
| | 88 | , 'shift_l' : shift_l |
| | 89 | , 'r0_to_pads' : r0_to_pads |
| | 90 | , 'r3_to_pads' : r3_to_pads |
| | 91 | , 'r0_from_pads' : r0_from_pads |
| | 92 | , 'r3_from_pads' : r3_from_pads |
| | 93 | , 'q0_to_pads' : q0_to_pads |
| | 94 | , 'q3_to_pads' : q3_to_pads |
| | 95 | , 'q0_from_pads' : q0_from_pads |
| | 96 | , 'q3_from_pads' : q3_from_pads |
| | 97 | , 'ck' : self.ckc |
| | 98 | , 'a_from_pads' : a_from_pads |
| | 99 | , 'b_from_pads' : b_from_pads |
| | 100 | , 'd_from_pads' : d_from_pads |
| | 101 | , 'i_from_pads' : i_from_pads |
| | 102 | , 'y_to_pads' : y_to_pads |
| | 103 | , 'noe_from_pads' : noe_from_pads |
| | 104 | , 'y_oe' : y_oe |
| | 105 | , 'vdd' : self.vdd |
| | 106 | , 'vss' : self.vss |
| | 107 | } |
| | 108 | ) |
| | 109 | |
| | 110 | self.p_ck = Inst ( "pck_px", "p_ck" |
| | 111 | , map = { 'pad' : self.cke |
| | 112 | , 'ck' : ck_ring |
| | 113 | , 'vddi' : self.vdd |
| | 114 | , 'vssi' : self.vss |
| | 115 | , 'vdde' : self.vdde |
| | 116 | , 'vsse' : self.vsse |
| | 117 | } |
| | 118 | ) |
| | 119 | |
| | 120 | self.p_cin = Inst ( "pi_px", "p_cin" |
| | 121 | , map = { 'pad' : self.cin |
| | 122 | , 't' : cin_from_pads |
| | 123 | , 'ck' : ck_ring |
| | 124 | , 'vddi' : self.vdd |
| | 125 | , 'vssi' : self.vss |
| | 126 | , 'vdde' : self.vdde |
| | 127 | , 'vsse' : self.vsse |
| | 128 | } |
| | 129 | ) |
| | 130 | |
| | 131 | self.p_noe = Inst ( "pi_px", "p_noe" |
| | 132 | , map = { 'pad' : self.noe |
| | 133 | , 't' : noe_from_pads |
| | 134 | , 'ck' : ck_ring |
| | 135 | , 'vddi' : self.vdd |
| | 136 | , 'vssi' : self.vss |
| | 137 | , 'vdde' : self.vdde |
| | 138 | , 'vsse' : self.vsse |
| | 139 | } |
| | 140 | ) |
| | 141 | |
| | 142 | self.p_a = {} |
| | 143 | self.p_b = {} |
| | 144 | self.p_d = {} |
| | 145 | for i in range ( 4 ) : |
| | 146 | self.p_a[i] = Inst ( "pi_px", "p_a%d" % i |
| | 147 | , map = { 'pad' : self.a[i] |
| | 148 | , 't' : a_from_pads[i] |
| | 149 | , 'ck' : ck_ring |
| | 150 | , 'vddi' : self.vdd |
| | 151 | , 'vssi' : self.vss |
| | 152 | , 'vdde' : self.vdde |
| | 153 | , 'vsse' : self.vsse |
| | 154 | } |
| | 155 | ) |
| | 156 | |
| | 157 | self.p_b[i] = Inst ( "pi_px", "p_b%d" % i |
| | 158 | , map = { 'pad' : self.b[i] |
| | 159 | , 't' : b_from_pads[i] |
| | 160 | , 'ck' : ck_ring |
| | 161 | , 'vddi' : self.vdd |
| | 162 | , 'vssi' : self.vss |
| | 163 | , 'vdde' : self.vdde |
| | 164 | , 'vsse' : self.vsse |
| | 165 | } |
| | 166 | ) |
| | 167 | |
| | 168 | self.p_d[i] = Inst ( "pi_px", "p_d%d" % i |
| | 169 | , map = { 'pad' : self.d[i] |
| | 170 | , 't' : d_from_pads[i] |
| | 171 | , 'ck' : ck_ring |
| | 172 | , 'vddi' : self.vdd |
| | 173 | , 'vssi' : self.vss |
| | 174 | , 'vdde' : self.vdde |
| | 175 | , 'vsse' : self.vsse |
| | 176 | } |
| | 177 | ) |
| | 178 | |
| | 179 | self.p_i = {} |
| | 180 | for i in range ( 9 ) : |
| | 181 | self.p_i[i] = Inst ( "pi_px", "p_i%d" % i |
| | 182 | , map = { 'pad' : self.i[i] |
| | 183 | , 't' : i_from_pads[i] |
| | 184 | , 'ck' : ck_ring |
| | 185 | , 'vddi' : self.vdd |
| | 186 | , 'vssi' : self.vss |
| | 187 | , 'vdde' : self.vdde |
| | 188 | , 'vsse' : self.vsse |
| | 189 | } |
| | 190 | ) |
| | 191 | |
| | 192 | self.p_cout = Inst ( "po_px", "p_cout" |
| | 193 | , map = { 'i' : cout_to_pads |
| | 194 | , 'pad' : self.cout |
| | 195 | , 'ck' : ck_ring |
| | 196 | , 'vddi' : self.vdd |
| | 197 | , 'vssi' : self.vss |
| | 198 | , 'vdde' : self.vdde |
| | 199 | , 'vsse' : self.vsse |
| | 200 | } |
| | 201 | ) |
| | 202 | |
| | 203 | self.p_np = Inst ( "po_px", "p_np" |
| | 204 | , map = { 'i' : np_to_pads |
| | 205 | , 'pad' : self.np |
| | 206 | , 'ck' : ck_ring |
| | 207 | , 'vddi' : self.vdd |
| | 208 | , 'vssi' : self.vss |
| | 209 | , 'vdde' : self.vdde |
| | 210 | , 'vsse' : self.vsse |
| | 211 | } |
| | 212 | ) |
| | 213 | |
| | 214 | self.p_ng = Inst ( "po_px", "p_ng" |
| | 215 | , map = { 'i' : ng_to_pads |
| | 216 | , 'pad' : self.ng |
| | 217 | , 'ck' : ck_ring |
| | 218 | , 'vddi' : self.vdd |
| | 219 | , 'vssi' : self.vss |
| | 220 | , 'vdde' : self.vdde |
| | 221 | , 'vsse' : self.vsse |
| | 222 | } |
| | 223 | ) |
| | 224 | |
| | 225 | self.p_ovr = Inst ( "po_px", "p_ovr" |
| | 226 | , map = { 'i' : ovr_to_pads |
| | 227 | , 'pad' : self.ovr |
| | 228 | , 'ck' : ck_ring |
| | 229 | , 'vddi' : self.vdd |
| | 230 | , 'vssi' : self.vss |
| | 231 | , 'vdde' : self.vdde |
| | 232 | , 'vsse' : self.vsse |
| | 233 | } |
| | 234 | ) |
| | 235 | |
| | 236 | self.p_zero = Inst ( "po_px", "p_zero" |
| | 237 | , map = { 'i' : zero_to_pads |
| | 238 | , 'pad' : self.zero |
| | 239 | , 'ck' : ck_ring |
| | 240 | , 'vddi' : self.vdd |
| | 241 | , 'vssi' : self.vss |
| | 242 | , 'vdde' : self.vdde |
| | 243 | , 'vsse' : self.vsse |
| | 244 | } |
| | 245 | ) |
| | 246 | |
| | 247 | self.p_signe = Inst ( "po_px", "p_signe" |
| | 248 | , map = { 'i' : signe_to_pads |
| | 249 | , 'pad' : self.signe |
| | 250 | , 'ck' : ck_ring |
| | 251 | , 'vddi' : self.vdd |
| | 252 | , 'vssi' : self.vss |
| | 253 | , 'vdde' : self.vdde |
| | 254 | , 'vsse' : self.vsse |
| | 255 | } |
| | 256 | ) |
| | 257 | |
| | 258 | self.p_y = {} |
| | 259 | for i in range ( 4 ) : |
| | 260 | self.p_y[i] = Inst ( "pot_px", "p_y%d" % i |
| | 261 | , map = { 'i' : y_to_pads[i] |
| | 262 | , 'b' : y_oe |
| | 263 | , 'pad' : self.y[i] |
| | 264 | , 'ck' : ck_ring |
| | 265 | , 'vddi' : self.vdd |
| | 266 | , 'vssi' : self.vss |
| | 267 | , 'vdde' : self.vdde |
| | 268 | , 'vsse' : self.vsse |
| | 269 | } |
| | 270 | ) |
| | 271 | |
| | 272 | self.p_q0 = Inst ( "piot_px", "p_q0" |
| | 273 | , map = { 'i' : q0_to_pads |
| | 274 | , 'b' : shift_r |
| | 275 | , 't' : q0_from_pads |
| | 276 | , 'pad' : self.q0 |
| | 277 | , 'ck' : ck_ring |
| | 278 | , 'vddi' : self.vdd |
| | 279 | , 'vssi' : self.vss |
| | 280 | , 'vdde' : self.vdde |
| | 281 | , 'vsse' : self.vsse |
| | 282 | } |
| | 283 | ) |
| | 284 | |
| | 285 | self.p_q3 = Inst ( "piot_px", "p_q3" |
| | 286 | , map = { 'i' : q3_to_pads |
| | 287 | , 'b' : shift_l |
| | 288 | , 't' : q3_from_pads |
| | 289 | , 'pad' : self.q3 |
| | 290 | , 'ck' : ck_ring |
| | 291 | , 'vddi' : self.vdd |
| | 292 | , 'vssi' : self.vss |
| | 293 | , 'vdde' : self.vdde |
| | 294 | , 'vsse' : self.vsse |
| | 295 | } |
| | 296 | ) |
| | 297 | |
| | 298 | self.p_r0 = Inst ( "piot_px", "p_r0" |
| | 299 | , map = { 'i' : r0_to_pads |
| | 300 | , 'b' : shift_r |
| | 301 | , 't' : r0_from_pads |
| | 302 | , 'pad' : self.r0 |
| | 303 | , 'ck' : ck_ring |
| | 304 | , 'vddi' : self.vdd |
| | 305 | , 'vssi' : self.vss |
| | 306 | , 'vdde' : self.vdde |
| | 307 | , 'vsse' : self.vsse |
| | 308 | } |
| | 309 | ) |
| | 310 | |
| | 311 | self.p_r3 = Inst ( "piot_px", "p_r3" |
| | 312 | , map = { 'i' : r3_to_pads |
| | 313 | , 'b' : shift_l |
| | 314 | , 't' : r3_from_pads |
| | 315 | , 'pad' : self.r3 |
| | 316 | , 'ck' : ck_ring |
| | 317 | , 'vddi' : self.vdd |
| | 318 | , 'vssi' : self.vss |
| | 319 | , 'vdde' : self.vdde |
| | 320 | , 'vsse' : self.vsse |
| | 321 | } |
| | 322 | ) |
| | 323 | |
| | 324 | self.p_vddick0 = Inst ( "pvddick_px", "p_vddick0" |
| | 325 | , map = { 'cko' : self.ckc |
| | 326 | , 'ck' : ck_ring |
| | 327 | , 'vddi' : self.vdd |
| | 328 | , 'vssi' : self.vss |
| | 329 | , 'vdde' : self.vdde |
| | 330 | , 'vsse' : self.vsse |
| | 331 | } |
| | 332 | ) |
| | 333 | |
| | 334 | self.p_vssick0 = Inst ( "pvssick_px", "p_vssick0" |
| | 335 | , map = { 'cko' : self.ckc |
| | 336 | , 'ck' : ck_ring |
| | 337 | , 'vddi' : self.vdd |
| | 338 | , 'vssi' : self.vss |
| | 339 | , 'vdde' : self.vdde |
| | 340 | , 'vsse' : self.vsse |
| | 341 | } |
| | 342 | ) |
| | 343 | |
| | 344 | self.p_vddeck0 = Inst ( "pvddeck_px", "p_vddeck0" |
| | 345 | , map = { 'cko' : self.ckc |
| | 346 | , 'ck' : ck_ring |
| | 347 | , 'vddi' : self.vdd |
| | 348 | , 'vssi' : self.vss |
| | 349 | , 'vdde' : self.vdde |
| | 350 | , 'vsse' : self.vsse |
| | 351 | } |
| | 352 | ) |
| | 353 | |
| | 354 | self.p_vddeck1 = Inst ( "pvddeck_px", "p_vddeck1" |
| | 355 | , map = { 'cko' : self.ckc |
| | 356 | , 'ck' : ck_ring |
| | 357 | , 'vddi' : self.vdd |
| | 358 | , 'vssi' : self.vss |
| | 359 | , 'vdde' : self.vdde |
| | 360 | , 'vsse' : self.vsse |
| | 361 | } |
| | 362 | ) |
| | 363 | |
| | 364 | self.p_vsseck0 = Inst ( "pvsseck_px", "p_vsseck0" |
| | 365 | , map = { 'cko' : self.ckc |
| | 366 | , 'ck' : ck_ring |
| | 367 | , 'vddi' : self.vdd |
| | 368 | , 'vssi' : self.vss |
| | 369 | , 'vdde' : self.vdde |
| | 370 | , 'vsse' : self.vsse |
| | 371 | } |
| | 372 | ) |
| | 373 | |
| | 374 | self.p_vsseck1 = Inst ( "pvsseck_px", "p_vsseck1" |
| | 375 | , map = { 'cko' : self.ckc |
| | 376 | , 'ck' : ck_ring |
| | 377 | , 'vddi' : self.vdd |
| | 378 | , 'vssi' : self.vss |
| | 379 | , 'vdde' : self.vdde |
| | 380 | , 'vsse' : self.vsse |
| | 381 | } |
| | 382 | ) |
| | 383 | |
| | 384 | |
| | 385 | def Layout ( self ) : |
| | 386 | |
| | 387 | ##### A COMLPETER ##### |
| | 388 | DefAb(XY(0,0),XY(3000,3000)) |
| | 389 | |
| | 390 | PlaceCentric(self.coeur) |
| | 391 | |
| | 392 | PadNorth(self.p_i[3],self.p_i[4],self.p_i[5],self.p_b[0],self.p_b[1],self.p_b[2],self.p_b[3] |
| | 393 | ,self.p_q0,self.p_q3,self.p_i[6],self.p_i[7]) |
| | 394 | |
| | 395 | |
| | 396 | PadWest(self.p_ck,self.p_d[0],self.p_d[1],self.p_d[2],self.p_zero,self.p_vsseck0,self.p_ovr |
| | 397 | ,self.p_d[3],self.p_i[0],self.p_i[1],self.p_i[2]) |
| | 398 | |
| | 399 | |
| | 400 | PadSouth(self.p_cin,self.p_np,self.p_ng,self.p_vssick0,self.p_vddeck0,self.p_vsseck1,self.p_vddeck1 |
| | 401 | ,self.p_cout,self.p_y[0],self.p_y[1],self.p_y[2]) |
| | 402 | |
| | 403 | |
| | 404 | PadEast(self.p_y[3],self.p_signe,self.p_noe,self.p_a[0],self.p_a[1],self.p_vddick0 |
| | 405 | ,self.p_a[2],self.p_a[3],self.p_r0,self.p_r3,self.p_i[8]) |
| | 406 | |
| | 407 | |
| | 408 | |
| | 409 | |
| | 410 | |
| | 411 | PowerRing(3) |
| | 412 | |
| | 413 | PlaceGlue(self.coeur) |
| | 414 | |
| | 415 | FillCell(self.coeur) |
| | 416 | |
| | 417 | RouteCk(self.ckc) |
| | 418 | |
| | 419 | |
| | 420 | mon_chip = amd_chip ( "amd_2901_dpt" ) |
| | 421 | |
| | 422 | mon_chip.Interface () |
| | 423 | mon_chip.Netlist () |
| | 424 | #mon_chip.Layout () |
| | 425 | mon_chip.View () |
| | 426 | mon_chip.Save (LAYOUT) |
| | 427 | }}} |
| | 428 | Quels sont les fichiers obtenus? regardez en utilisant ''' graal''' le résultat du placement. |
| | 429 | ==== Question 2 ==== |
| | 430 | Faites varier la taille de la boite d'aboutement, qu'observez-vous ? Avez vous rencontré une limite ? peut-on en déduire la largeur des plots. |
| | 431 | === Exercice 2-Routage === |
| | 432 | Cette seconde étape consiste à relier les cellulesdu coeur entre elles. Vous allez pour cela utiliser l'outil '''nero''' . Consultez le ''' man ''' de ''' nero''' |
| | 433 | {{{ |
| | 434 | >nero -v -3 -p amd_chip_pl amd amd_route |
| | 435 | }}} |
| | 436 | ==== Question 1 ==== |
| | 437 | A quoi correspondent les options utilisées dans la commande ci-dessus? Faites varier le nombre de couches de métal utilisés pour le routage. |
| | 438 | === Exercice 3-Validation du routage === |
| | 439 | Cette étape consiste à vérifier que le routage a été effectué sans erreur. Il y a deux types de vérifications à réaliser |
| | 440 | * Vérifier le respect des règles de dessin |
| | 441 | * Vérifier les interconnexions réalisées |
| | 442 | ==== Question 1 ==== |
| | 443 | Vérifiez le respect des règles de dessin en utilisant '''Druc''' . Vous aurez pris soin au préalable de vérifier que vous utilisez la technologie symbolique |
| | 444 | ==== Question 2 ==== |
| | 445 | Utilisez l'outil '''cougar''' pour extraire la ''netlist ''de votre circuit au niveau "cellules de base ". Vous aurez au préalable pris soin de positionner la variable d'environnement '''MBK_OUT_LO''' au format '''al'''. |
| | 446 | ==== Question 3 ==== |
| | 447 | Comparez la ''netlist'' extraite à celle d'origine (avnt routage) en utilisant l'outil '''lvx''' |
