1 /** @file 2 This file contains definitions for SPD DDR4. 3 4 Copyright (c) 2016, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 @par Revision Reference: 14 - Serial Presence Detect (SPD) for DDR4 SDRAM Modules Document Release 4 15 http://www.jedec.org/standards-documents/docs/spd412l-4 16 **/ 17 18 #ifndef _SDRAM_SPD_DDR4_H_ 19 #define _SDRAM_SPD_DDR4_H_ 20 21 #pragma pack (push, 1) 22 23 typedef union { 24 struct { 25 UINT8 BytesUsed : 4; ///< Bits 3:0 26 UINT8 BytesTotal : 3; ///< Bits 6:4 27 UINT8 CrcCoverage : 1; ///< Bits 7:7 28 } Bits; 29 UINT8 Data; 30 } SPD4_DEVICE_DESCRIPTION_STRUCT; 31 32 typedef union { 33 struct { 34 UINT8 Minor : 4; ///< Bits 3:0 35 UINT8 Major : 4; ///< Bits 7:4 36 } Bits; 37 UINT8 Data; 38 } SPD4_REVISION_STRUCT; 39 40 typedef union { 41 struct { 42 UINT8 Type : 8; ///< Bits 7:0 43 } Bits; 44 UINT8 Data; 45 } SPD4_DRAM_DEVICE_TYPE_STRUCT; 46 47 typedef union { 48 struct { 49 UINT8 ModuleType : 4; ///< Bits 3:0 50 UINT8 HybridMedia : 3; ///< Bits 6:4 51 UINT8 Hybrid : 1; ///< Bits 7:7 52 } Bits; 53 UINT8 Data; 54 } SPD4_MODULE_TYPE_STRUCT; 55 56 typedef union { 57 struct { 58 UINT8 Density : 4; ///< Bits 3:0 59 UINT8 BankAddress : 2; ///< Bits 5:4 60 UINT8 BankGroup : 2; ///< Bits 7:6 61 } Bits; 62 UINT8 Data; 63 } SPD4_SDRAM_DENSITY_BANKS_STRUCT; 64 65 typedef union { 66 struct { 67 UINT8 ColumnAddress : 3; ///< Bits 2:0 68 UINT8 RowAddress : 3; ///< Bits 5:3 69 UINT8 Reserved : 2; ///< Bits 7:6 70 } Bits; 71 UINT8 Data; 72 } SPD4_SDRAM_ADDRESSING_STRUCT; 73 74 typedef union { 75 struct { 76 UINT8 SignalLoading : 2; ///< Bits 1:0 77 UINT8 Reserved : 2; ///< Bits 3:2 78 UINT8 DieCount : 3; ///< Bits 6:4 79 UINT8 SdramPackageType : 1; ///< Bits 7:7 80 } Bits; 81 UINT8 Data; 82 } SPD4_PRIMARY_SDRAM_PACKAGE_TYPE_STRUCT; 83 84 typedef union { 85 struct { 86 UINT8 MaximumActivateCount : 4; ///< Bits 3:0 87 UINT8 MaximumActivateWindow : 2; ///< Bits 5:4 88 UINT8 Reserved : 2; ///< Bits 7:6 89 } Bits; 90 UINT8 Data; 91 } SPD4_SDRAM_OPTIONAL_FEATURES_STRUCT; 92 93 typedef union { 94 struct { 95 UINT8 Reserved : 8; ///< Bits 7:0 96 } Bits; 97 UINT8 Data; 98 } SPD4_SDRAM_THERMAL_REFRESH_STRUCT; 99 100 typedef union { 101 struct { 102 UINT8 Reserved : 5; ///< Bits 4:0 103 UINT8 SoftPPR : 1; ///< Bits 5:5 104 UINT8 PostPackageRepair : 2; ///< Bits 7:6 105 } Bits; 106 UINT8 Data; 107 } SPD4_OTHER_SDRAM_OPTIONAL_FEATURES_STRUCT; 108 109 typedef union { 110 struct { 111 UINT8 SignalLoading : 2; ///< Bits 1:0 112 UINT8 DRAMDensityRatio : 2; ///< Bits 3:2 113 UINT8 DieCount : 3; ///< Bits 6:4 114 UINT8 SdramPackageType : 1; ///< Bits 7:7 115 } Bits; 116 UINT8 Data; 117 } SPD4_SECONDARY_SDRAM_PACKAGE_TYPE_STRUCT; 118 119 typedef union { 120 struct { 121 UINT8 OperationAt1_20 : 1; ///< Bits 0:0 122 UINT8 EndurantAt1_20 : 1; ///< Bits 1:1 123 UINT8 Reserved : 6; ///< Bits 7:2 124 } Bits; 125 UINT8 Data; 126 } SPD4_MODULE_NOMINAL_VOLTAGE_STRUCT; 127 128 typedef union { 129 struct { 130 UINT8 SdramDeviceWidth : 3; ///< Bits 2:0 131 UINT8 RankCount : 3; ///< Bits 5:3 132 UINT8 RankMix : 1; ///< Bits 6:6 133 UINT8 Reserved : 1; ///< Bits 7:7 134 } Bits; 135 UINT8 Data; 136 } SPD4_MODULE_ORGANIZATION_STRUCT; 137 138 typedef union { 139 struct { 140 UINT8 PrimaryBusWidth : 3; ///< Bits 2:0 141 UINT8 BusWidthExtension : 2; ///< Bits 4:3 142 UINT8 Reserved : 3; ///< Bits 7:5 143 } Bits; 144 UINT8 Data; 145 } SPD4_MODULE_MEMORY_BUS_WIDTH_STRUCT; 146 147 typedef union { 148 struct { 149 UINT8 Reserved : 7; ///< Bits 6:0 150 UINT8 ThermalSensorPresence : 1; ///< Bits 7:7 151 } Bits; 152 UINT8 Data; 153 } SPD4_MODULE_THERMAL_SENSOR_STRUCT; 154 155 typedef union { 156 struct { 157 UINT8 ExtendedBaseModuleType : 4; ///< Bits 3:0 158 UINT8 Reserved : 4; ///< Bits 7:4 159 } Bits; 160 UINT8 Data; 161 } SPD4_EXTENDED_MODULE_TYPE_STRUCT; 162 163 typedef union { 164 struct { 165 UINT8 Fine : 2; ///< Bits 1:0 166 UINT8 Medium : 2; ///< Bits 3:2 167 UINT8 Reserved : 4; ///< Bits 7:4 168 } Bits; 169 UINT8 Data; 170 } SPD4_TIMEBASE_STRUCT; 171 172 typedef union { 173 struct { 174 UINT8 tCKmin : 8; ///< Bits 7:0 175 } Bits; 176 UINT8 Data; 177 } SPD4_TCK_MIN_MTB_STRUCT; 178 179 typedef union { 180 struct { 181 UINT8 tCKmax : 8; ///< Bits 7:0 182 } Bits; 183 UINT8 Data; 184 } SPD4_TCK_MAX_MTB_STRUCT; 185 186 typedef union { 187 struct { 188 UINT32 Cl7 : 1; ///< Bits 0:0 189 UINT32 Cl8 : 1; ///< Bits 1:1 190 UINT32 Cl9 : 1; ///< Bits 2:2 191 UINT32 Cl10 : 1; ///< Bits 3:3 192 UINT32 Cl11 : 1; ///< Bits 4:4 193 UINT32 Cl12 : 1; ///< Bits 5:5 194 UINT32 Cl13 : 1; ///< Bits 6:6 195 UINT32 Cl14 : 1; ///< Bits 7:7 196 UINT32 Cl15 : 1; ///< Bits 8:8 197 UINT32 Cl16 : 1; ///< Bits 9:9 198 UINT32 Cl17 : 1; ///< Bits 10:10 199 UINT32 Cl18 : 1; ///< Bits 11:11 200 UINT32 Cl19 : 1; ///< Bits 12:12 201 UINT32 Cl20 : 1; ///< Bits 13:13 202 UINT32 Cl21 : 1; ///< Bits 14:14 203 UINT32 Cl22 : 1; ///< Bits 15:15 204 UINT32 Cl23 : 1; ///< Bits 16:16 205 UINT32 Cl24 : 1; ///< Bits 17:17 206 UINT32 Cl25 : 1; ///< Bits 18:18 207 UINT32 Cl26 : 1; ///< Bits 19:19 208 UINT32 Cl27 : 1; ///< Bits 20:20 209 UINT32 Cl28 : 1; ///< Bits 21:21 210 UINT32 Cl29 : 1; ///< Bits 22:22 211 UINT32 Cl30 : 1; ///< Bits 23:23 212 UINT32 Cl31 : 1; ///< Bits 24:24 213 UINT32 Cl32 : 1; ///< Bits 25:25 214 UINT32 Cl33 : 1; ///< Bits 26:26 215 UINT32 Cl34 : 1; ///< Bits 27:27 216 UINT32 Cl35 : 1; ///< Bits 28:28 217 UINT32 Cl36 : 1; ///< Bits 29:29 218 UINT32 Reserved : 1; ///< Bits 30:30 219 UINT32 ClRange : 1; ///< Bits 31:31 220 } Bits; 221 struct { 222 UINT32 Cl23 : 1; ///< Bits 0:0 223 UINT32 Cl24 : 1; ///< Bits 1:1 224 UINT32 Cl25 : 1; ///< Bits 2:2 225 UINT32 Cl26 : 1; ///< Bits 3:3 226 UINT32 Cl27 : 1; ///< Bits 4:4 227 UINT32 Cl28 : 1; ///< Bits 5:5 228 UINT32 Cl29 : 1; ///< Bits 6:6 229 UINT32 Cl30 : 1; ///< Bits 7:7 230 UINT32 Cl31 : 1; ///< Bits 8:8 231 UINT32 Cl32 : 1; ///< Bits 9:9 232 UINT32 Cl33 : 1; ///< Bits 10:10 233 UINT32 Cl34 : 1; ///< Bits 11:11 234 UINT32 Cl35 : 1; ///< Bits 12:12 235 UINT32 Cl36 : 1; ///< Bits 13:13 236 UINT32 Cl37 : 1; ///< Bits 14:14 237 UINT32 Cl38 : 1; ///< Bits 15:15 238 UINT32 Cl39 : 1; ///< Bits 16:16 239 UINT32 Cl40 : 1; ///< Bits 17:17 240 UINT32 Cl41 : 1; ///< Bits 18:18 241 UINT32 Cl42 : 1; ///< Bits 19:19 242 UINT32 Cl43 : 1; ///< Bits 20:20 243 UINT32 Cl44 : 1; ///< Bits 21:21 244 UINT32 Cl45 : 1; ///< Bits 22:22 245 UINT32 Cl46 : 1; ///< Bits 23:23 246 UINT32 Cl47 : 1; ///< Bits 24:24 247 UINT32 Cl48 : 1; ///< Bits 25:25 248 UINT32 Cl49 : 1; ///< Bits 26:26 249 UINT32 Cl50 : 1; ///< Bits 27:27 250 UINT32 Cl51 : 1; ///< Bits 28:28 251 UINT32 Cl52 : 1; ///< Bits 29:29 252 UINT32 Reserved : 1; ///< Bits 30:30 253 UINT32 ClRange : 1; ///< Bits 31:31 254 } HighRangeBits; 255 UINT32 Data; 256 UINT16 Data16[2]; 257 UINT8 Data8[4]; 258 } SPD4_CAS_LATENCIES_SUPPORTED_STRUCT; 259 260 typedef union { 261 struct { 262 UINT8 tAAmin : 8; ///< Bits 7:0 263 } Bits; 264 UINT8 Data; 265 } SPD4_TAA_MIN_MTB_STRUCT; 266 267 typedef union { 268 struct { 269 UINT8 tRCDmin : 8; ///< Bits 7:0 270 } Bits; 271 UINT8 Data; 272 } SPD4_TRCD_MIN_MTB_STRUCT; 273 274 typedef union { 275 struct { 276 UINT8 tRPmin : 8; ///< Bits 7:0 277 } Bits; 278 UINT8 Data; 279 } SPD4_TRP_MIN_MTB_STRUCT; 280 281 typedef union { 282 struct { 283 UINT8 tRASminUpper : 4; ///< Bits 3:0 284 UINT8 tRCminUpper : 4; ///< Bits 7:4 285 } Bits; 286 UINT8 Data; 287 } SPD4_TRAS_TRC_MIN_MTB_STRUCT; 288 289 typedef union { 290 struct { 291 UINT8 tRASmin : 8; ///< Bits 7:0 292 } Bits; 293 UINT8 Data; 294 } SPD4_TRAS_MIN_MTB_STRUCT; 295 296 typedef union { 297 struct { 298 UINT8 tRCmin : 8; ///< Bits 7:0 299 } Bits; 300 UINT8 Data; 301 } SPD4_TRC_MIN_MTB_STRUCT; 302 303 typedef union { 304 struct { 305 UINT16 tRFCmin : 16; ///< Bits 15:0 306 } Bits; 307 UINT16 Data; 308 UINT8 Data8[2]; 309 } SPD4_TRFC_MIN_MTB_STRUCT; 310 311 typedef union { 312 struct { 313 UINT8 tFAWminUpper : 4; ///< Bits 3:0 314 UINT8 Reserved : 4; ///< Bits 7:4 315 } Bits; 316 UINT8 Data; 317 } SPD4_TFAW_MIN_MTB_UPPER_STRUCT; 318 319 typedef union { 320 struct { 321 UINT8 tFAWmin : 8; ///< Bits 7:0 322 } Bits; 323 UINT8 Data; 324 } SPD4_TFAW_MIN_MTB_STRUCT; 325 326 typedef union { 327 struct { 328 UINT8 tRRDmin : 8; ///< Bits 7:0 329 } Bits; 330 UINT8 Data; 331 } SPD4_TRRD_MIN_MTB_STRUCT; 332 333 typedef union { 334 struct { 335 UINT8 tCCDmin : 8; ///< Bits 7:0 336 } Bits; 337 UINT8 Data; 338 } SPD4_TCCD_MIN_MTB_STRUCT; 339 340 typedef union { 341 struct { 342 UINT8 tWRminMostSignificantNibble : 4; ///< Bits 3:0 343 UINT8 Reserved : 4; ///< Bits 7:4 344 } Bits; 345 UINT8 Data; 346 } SPD4_TWR_UPPER_NIBBLE_STRUCT; 347 348 typedef union { 349 struct { 350 UINT8 tWRmin : 8; ///< Bits 7:0 351 } Bits; 352 UINT8 Data; 353 } SPD4_TWR_MIN_MTB_STRUCT; 354 355 typedef union { 356 struct { 357 UINT8 tWTR_SminMostSignificantNibble : 4; ///< Bits 3:0 358 UINT8 tWTR_LminMostSignificantNibble : 4; ///< Bits 7:4 359 } Bits; 360 UINT8 Data; 361 } SPD4_TWTR_UPPER_NIBBLE_STRUCT; 362 363 typedef union { 364 struct { 365 UINT8 tWTRmin : 8; ///< Bits 7:0 366 } Bits; 367 UINT8 Data; 368 } SPD4_TWTR_MIN_MTB_STRUCT; 369 370 typedef union { 371 struct { 372 UINT8 BitOrderatSDRAM : 5; ///< Bits 4:0 373 UINT8 WiredtoUpperLowerNibble : 1; ///< Bits 5:5 374 UINT8 PackageRankMap : 2; ///< Bits 7:6 375 } Bits; 376 UINT8 Data; 377 } SPD4_CONNECTOR_BIT_MAPPING_BYTE_STRUCT; 378 379 typedef union { 380 struct { 381 INT8 tCCDminFine : 8; ///< Bits 7:0 382 } Bits; 383 INT8 Data; 384 } SPD4_TCCD_MIN_FTB_STRUCT; 385 386 typedef union { 387 struct { 388 INT8 tRRDminFine : 8; ///< Bits 7:0 389 } Bits; 390 INT8 Data; 391 } SPD4_TRRD_MIN_FTB_STRUCT; 392 393 typedef union { 394 struct { 395 INT8 tRCminFine : 8; ///< Bits 7:0 396 } Bits; 397 INT8 Data; 398 } SPD4_TRC_MIN_FTB_STRUCT; 399 400 typedef union { 401 struct { 402 INT8 tRPminFine : 8; ///< Bits 7:0 403 } Bits; 404 INT8 Data; 405 } SPD4_TRP_MIN_FTB_STRUCT; 406 407 typedef union { 408 struct { 409 INT8 tRCDminFine : 8; ///< Bits 7:0 410 } Bits; 411 INT8 Data; 412 } SPD4_TRCD_MIN_FTB_STRUCT; 413 414 typedef union { 415 struct { 416 INT8 tAAminFine : 8; ///< Bits 7:0 417 } Bits; 418 INT8 Data; 419 } SPD4_TAA_MIN_FTB_STRUCT; 420 421 typedef union { 422 struct { 423 INT8 tCKmaxFine : 8; ///< Bits 7:0 424 } Bits; 425 INT8 Data; 426 } SPD4_TCK_MAX_FTB_STRUCT; 427 428 typedef union { 429 struct { 430 INT8 tCKminFine : 8; ///< Bits 7:0 431 } Bits; 432 INT8 Data; 433 } SPD4_TCK_MIN_FTB_STRUCT; 434 435 typedef union { 436 struct { 437 UINT8 Height : 5; ///< Bits 4:0 438 UINT8 RawCardExtension : 3; ///< Bits 7:5 439 } Bits; 440 UINT8 Data; 441 } SPD4_UNBUF_MODULE_NOMINAL_HEIGHT; 442 443 typedef union { 444 struct { 445 UINT8 FrontThickness : 4; ///< Bits 3:0 446 UINT8 BackThickness : 4; ///< Bits 7:4 447 } Bits; 448 UINT8 Data; 449 } SPD4_UNBUF_MODULE_NOMINAL_THICKNESS; 450 451 typedef union { 452 struct { 453 UINT8 Card : 5; ///< Bits 4:0 454 UINT8 Revision : 2; ///< Bits 6:5 455 UINT8 Extension : 1; ///< Bits 7:7 456 } Bits; 457 UINT8 Data; 458 } SPD4_UNBUF_REFERENCE_RAW_CARD; 459 460 typedef union { 461 struct { 462 UINT8 MappingRank1 : 1; ///< Bits 0:0 463 UINT8 Reserved : 7; ///< Bits 7:1 464 } Bits; 465 UINT8 Data; 466 } SPD4_UNBUF_ADDRESS_MAPPING; 467 468 typedef union { 469 struct { 470 UINT8 Height : 5; ///< Bits 4:0 471 UINT8 Reserved : 3; ///< Bits 7:5 472 } Bits; 473 UINT8 Data; 474 } SPD4_RDIMM_MODULE_NOMINAL_HEIGHT; 475 476 typedef union { 477 struct { 478 UINT8 FrontThickness : 4; ///< Bits 3:0 479 UINT8 BackThickness : 4; ///< Bits 7:4 480 } Bits; 481 UINT8 Data; 482 } SPD4_RDIMM_MODULE_NOMINAL_THICKNESS; 483 484 typedef union { 485 struct { 486 UINT8 Card : 5; ///< Bits 4:0 487 UINT8 Revision : 2; ///< Bits 6:5 488 UINT8 Extension : 1; ///< Bits 7:7 489 } Bits; 490 UINT8 Data; 491 } SPD4_RDIMM_REFERENCE_RAW_CARD; 492 493 typedef union { 494 struct { 495 UINT8 RegisterCount : 2; ///< Bits 1:0 496 UINT8 DramRowCount : 2; ///< Bits 3:2 497 UINT8 RegisterType : 4; ///< Bits 7:4 498 } Bits; 499 UINT8 Data; 500 } SPD4_RDIMM_MODULE_ATTRIBUTES; 501 502 typedef union { 503 struct { 504 UINT8 HeatSpreaderThermalCharacteristics : 7; ///< Bits 6:0 505 UINT8 HeatSpreaderSolution : 1; ///< Bits 7:7 506 } Bits; 507 UINT8 Data; 508 } SPD4_RDIMM_THERMAL_HEAT_SPREADER_SOLUTION; 509 510 typedef union { 511 struct { 512 UINT16 ContinuationCount : 7; ///< Bits 6:0 513 UINT16 ContinuationParity : 1; ///< Bits 7:7 514 UINT16 LastNonZeroByte : 8; ///< Bits 15:8 515 } Bits; 516 UINT16 Data; 517 UINT8 Data8[2]; 518 } SPD4_MANUFACTURER_ID_CODE; 519 520 typedef union { 521 struct { 522 UINT8 RegisterRevisionNumber; ///< Bits 7:0 523 } Bits; 524 UINT8 Data; 525 } SPD4_RDIMM_REGISTER_REVISION_NUMBER; 526 527 typedef union { 528 struct { 529 UINT8 Rank1Mapping : 1; ///< Bits 0:0 530 UINT8 Reserved : 7; ///< Bits 7:1 531 } Bits; 532 UINT8 Data; 533 } SPD4_RDIMM_ADDRESS_MAPPING_FROM_REGISTER_TO_DRAM; 534 535 typedef union { 536 struct { 537 UINT8 Cke : 2; ///< Bits 1:0 538 UINT8 Odt : 2; ///< Bits 3:2 539 UINT8 CommandAddress : 2; ///< Bits 5:4 540 UINT8 ChipSelect : 2; ///< Bits 7:6 541 } Bits; 542 UINT8 Data; 543 } SPD4_RDIMM_REGISTER_OUTPUT_DRIVE_STRENGTH_FOR_CONTROL_COMMAND_ADDRESS; 544 545 typedef union { 546 struct { 547 UINT8 Y0Y2 : 2; ///< Bits 1:0 548 UINT8 Y1Y3 : 2; ///< Bits 3:2 549 UINT8 Reserved0 : 2; ///< Bits 5:4 550 UINT8 RcdOutputSlewRateControl : 1; ///< Bits 6:6 551 UINT8 Reserved1 : 1; ///< Bits 7:7 552 } Bits; 553 UINT8 Data; 554 } SPD4_RDIMM_REGISTER_OUTPUT_DRIVE_STRENGTH_FOR_CLOCK; 555 556 typedef union { 557 struct { 558 UINT8 Height : 5; ///< Bits 4:0 559 UINT8 Reserved : 3; ///< Bits 7:5 560 } Bits; 561 UINT8 Data; 562 } SPD4_LRDIMM_MODULE_NOMINAL_HEIGHT; 563 564 typedef union { 565 struct { 566 UINT8 FrontThickness : 4; ///< Bits 3:0 567 UINT8 BackThickness : 4; ///< Bits 7:4 568 } Bits; 569 UINT8 Data; 570 } SPD4_LRDIMM_MODULE_NOMINAL_THICKNESS; 571 572 typedef union { 573 struct { 574 UINT8 Card : 5; ///< Bits 4:0 575 UINT8 Revision : 2; ///< Bits 6:5 576 UINT8 Extension : 1; ///< Bits 7:7 577 } Bits; 578 UINT8 Data; 579 } SPD4_LRDIMM_REFERENCE_RAW_CARD; 580 581 typedef union { 582 struct { 583 UINT8 RegisterCount : 2; ///< Bits 1:0 584 UINT8 DramRowCount : 2; ///< Bits 3:2 585 UINT8 RegisterType : 4; ///< Bits 7:4 586 } Bits; 587 UINT8 Data; 588 } SPD4_LRDIMM_MODULE_ATTRIBUTES; 589 590 typedef union { 591 struct { 592 UINT8 HeatSpreaderThermalCharacteristics : 7; ///< Bits 6:0 593 UINT8 HeatSpreaderSolution : 1; ///< Bits 7:7 594 } Bits; 595 UINT8 Data; 596 } SPD4_LRDIMM_THERMAL_HEAT_SPREADER_SOLUTION; 597 598 typedef union { 599 struct { 600 UINT8 RegisterRevisionNumber; ///< Bits 7:0 601 } Bits; 602 UINT8 Data; 603 } SPD4_LRDIMM_REGISTER_REVISION_NUMBER; 604 605 typedef union { 606 struct { 607 UINT8 Rank1Mapping : 1; ///< Bits 0:0 608 UINT8 Reserved : 7; ///< Bits 7:1 609 } Bits; 610 UINT8 Data; 611 } SPD4_LRDIMM_ADDRESS_MAPPING_FROM_REGISTER_TO_DRAM; 612 613 typedef union { 614 struct { 615 UINT8 Cke : 2; ///< Bits 1:0 616 UINT8 Odt : 2; ///< Bits 3:2 617 UINT8 CommandAddress : 2; ///< Bits 5:4 618 UINT8 ChipSelect : 2; ///< Bits 7:6 619 } Bits; 620 UINT8 Data; 621 } SPD4_LRDIMM_REGISTER_OUTPUT_DRIVE_STRENGTH_FOR_CONTROL_COMMAND_ADDRESS; 622 623 typedef union { 624 struct { 625 UINT8 Y0Y2 : 2; ///< Bits 1:0 626 UINT8 Y1Y3 : 2; ///< Bits 3:2 627 UINT8 Reserved0 : 2; ///< Bits 5:4 628 UINT8 RcdOutputSlewRateControl : 1; ///< Bits 6:6 629 UINT8 Reserved1 : 1; ///< Bits 7:7 630 } Bits; 631 UINT8 Data; 632 } SPD4_LRDIMM_REGISTER_OUTPUT_DRIVE_STRENGTH_FOR_CLOCK; 633 634 typedef struct { 635 UINT8 DataBufferRevisionNumber; 636 } SPD4_LRDIMM_DATA_BUFFER_REVISION_NUMBER; 637 638 typedef union { 639 struct { 640 UINT8 DramVrefDQForPackageRank0 : 6; ///< Bits 5:0 641 UINT8 Reserved : 2; ///< Bits 7:6 642 } Bits; 643 UINT8 Data; 644 } SPD4_LRDIMM_DRAM_VREFDQ_FOR_PACKAGE_RANK; 645 646 typedef struct { 647 UINT8 DataBufferVrefDQforDramInterface; 648 } SPD4_LRDIMM_DATA_BUFFER_VREFDQ_FOR_DRAM_INTERFACE; 649 650 typedef union { 651 struct { 652 UINT8 DramInterfaceMdqDriveStrength : 4; ///< Bits 3:0 653 UINT8 DramInterfaceMdqReadTerminationStrength : 4; ///< Bits 7:4 654 } Bits; 655 UINT8 Data; 656 } SPD4_LRDIMM_DATA_BUFFER_MDQ_DRIVE_STRENGTH_RTT_FOR_DATA_RATE; 657 658 typedef union { 659 struct { 660 UINT8 DataRateLe1866 : 2; ///< Bits 1:0 661 UINT8 DataRateLe2400 : 2; ///< Bits 3:2 662 UINT8 DataRateLe3200 : 2; ///< Bits 5:4 663 UINT8 Reserved : 2; ///< Bits 7:6 664 } Bits; 665 UINT8 Data; 666 } SPD4_LRDIMM_DRAM_DRIVE_STRENGTH; 667 668 typedef union { 669 struct { 670 UINT8 Rtt_Nom : 3; ///< Bits 2:0 671 UINT8 Rtt_WR : 3; ///< Bits 5:3 672 UINT8 Reserved : 2; ///< Bits 7:6 673 } Bits; 674 UINT8 Data; 675 } SPD4_LRDIMM_DRAM_ODT_RTT_WR_RTT_NOM_FOR_DATA_RATE; 676 677 typedef union { 678 struct { 679 UINT8 PackageRanks0_1 : 3; ///< Bits 2:0 680 UINT8 PackageRanks2_3 : 3; ///< Bits 5:3 681 UINT8 Reserved : 2; ///< Bits 7:6 682 } Bits; 683 UINT8 Data; 684 } SPD4_LRDIMM_DRAM_ODT_RTT_PARK_FOR_DATA_RATE; 685 686 typedef union { 687 struct { 688 UINT8 Rank0 : 1; ///< Bits 0:0 689 UINT8 Rank1 : 1; ///< Bits 1:1 690 UINT8 Rank2 : 1; ///< Bits 2:2 691 UINT8 Rank3 : 1; ///< Bits 3:3 692 UINT8 DataBuffer : 1; ///< Bits 4:4 693 UINT8 Reserved : 3; ///< Bits 7:5 694 } Bits; 695 UINT8 Data; 696 } SPD4_LRDIMM_DATA_BUFFER_VREFDQ_FOR_DRAM_INTERFACE_RANGE; 697 698 typedef union { 699 struct { 700 UINT8 DataBufferGainAdjustment : 1; ///< Bits 0:0 701 UINT8 DataBufferDfe : 1; ///< Bits 1:1 702 UINT8 Reserved : 6; ///< Bits 7:2 703 } Bits; 704 UINT8 Data; 705 } SPD4_LRDIMM_DATA_BUFFER_DQ_DECISION_FEEDBACK_EQUALIZATION; 706 707 typedef UINT16 SPD4_NVDIMM_MODULE_PRODUCT_IDENTIFIER; 708 709 typedef union { 710 struct { 711 UINT16 ContinuationCount : 7; ///< Bits 6:0 712 UINT16 ContinuationParity : 1; ///< Bits 7:7 713 UINT16 LastNonZeroByte : 8; ///< Bits 15:8 714 } Bits; 715 UINT16 Data; 716 UINT8 Data8[2]; 717 } SPD4_NVDIMM_SUBSYSTEM_CONTROLLER_MANUFACTURER_ID_CODE; 718 719 typedef UINT16 SPD4_NVDIMM_SUBSYSTEM_CONTROLLER_IDENTIFIER; 720 721 typedef UINT8 SPD4_NVDIMM_SUBSYSTEM_CONTROLLER_REVISION_CODE; 722 723 typedef union { 724 struct { 725 UINT8 Card : 5; ///< Bits 4:0 726 UINT8 Revision : 2; ///< Bits 6:5 727 UINT8 Extension : 1; ///< Bits 7:7 728 } Bits; 729 UINT8 Data; 730 } SPD4_NVDIMM_REFERENCE_RAW_CARD; 731 732 typedef union { 733 struct { 734 UINT8 Reserved : 4; ///< Bits 3:0 735 UINT8 Extension : 4; ///< Bits 7:4 736 } Bits; 737 UINT8 Data; 738 } SPD4_NVDIMM_MODULE_CHARACTERISTICS; 739 740 typedef struct { 741 UINT8 Reserved; 742 UINT8 MediaType; 743 } SPD4_NVDIMM_HYBRID_MODULE_MEDIA_TYPES; 744 745 typedef UINT8 SPD4_NVDIMM_MAXIMUM_NONVOLATILE_MEMORY_INITIALIZATION_TIME; 746 747 typedef union { 748 struct { 749 UINT16 FunctionInterface : 5; ///< Bits 4:0 750 UINT16 FunctionClass : 5; ///< Bits 9:5 751 UINT16 BlockOffset : 4; ///< Bits 13:10 752 UINT16 Reserved : 1; ///< Bits 14:14 753 UINT16 Implemented : 1; ///< Bits 15:15 754 } Bits; 755 UINT16 Data; 756 UINT8 Data8[2]; 757 } SPD4_NVDIMM_FUNCTION_INTERFACE_DESCRIPTOR; 758 759 typedef struct { 760 UINT8 Year; ///< Year represented in BCD (00h = 2000) 761 UINT8 Week; ///< Year represented in BCD (47h = week 47) 762 } SPD4_MANUFACTURING_DATE; 763 764 typedef union { 765 UINT32 Data; 766 UINT16 SerialNumber16[2]; 767 UINT8 SerialNumber8[4]; 768 } SPD4_MANUFACTURER_SERIAL_NUMBER; 769 770 typedef struct { 771 UINT8 Location; ///< Module Manufacturing Location 772 } SPD4_MANUFACTURING_LOCATION; 773 774 typedef struct { 775 SPD4_MANUFACTURER_ID_CODE IdCode; ///< Module Manufacturer ID Code 776 SPD4_MANUFACTURING_LOCATION Location; ///< Module Manufacturing Location 777 SPD4_MANUFACTURING_DATE Date; ///< Module Manufacturing Year, in BCD (range: 2000-2255) 778 SPD4_MANUFACTURER_SERIAL_NUMBER SerialNumber; ///< Module Serial Number 779 } SPD4_UNIQUE_MODULE_ID; 780 781 typedef union { 782 UINT16 Crc[1]; 783 UINT8 Data8[2]; 784 } SPD4_CYCLIC_REDUNDANCY_CODE; 785 786 typedef struct { 787 SPD4_DEVICE_DESCRIPTION_STRUCT Description; ///< 0 Number of Serial PD Bytes Written / SPD Device Size / CRC Coverage 1, 2 788 SPD4_REVISION_STRUCT Revision; ///< 1 SPD Revision 789 SPD4_DRAM_DEVICE_TYPE_STRUCT DramDeviceType; ///< 2 DRAM Device Type 790 SPD4_MODULE_TYPE_STRUCT ModuleType; ///< 3 Module Type 791 SPD4_SDRAM_DENSITY_BANKS_STRUCT SdramDensityAndBanks; ///< 4 SDRAM Density and Banks 792 SPD4_SDRAM_ADDRESSING_STRUCT SdramAddressing; ///< 5 SDRAM Addressing 793 SPD4_PRIMARY_SDRAM_PACKAGE_TYPE_STRUCT PrimarySdramPackageType; ///< 6 Primary SDRAM Package Type 794 SPD4_SDRAM_OPTIONAL_FEATURES_STRUCT SdramOptionalFeatures; ///< 7 SDRAM Optional Features 795 SPD4_SDRAM_THERMAL_REFRESH_STRUCT ThermalAndRefreshOptions; ///< 8 SDRAM Thermal and Refresh Options 796 SPD4_OTHER_SDRAM_OPTIONAL_FEATURES_STRUCT OtherOptionalFeatures; ///< 9 Other SDRAM Optional Features 797 SPD4_SECONDARY_SDRAM_PACKAGE_TYPE_STRUCT SecondarySdramPackageType;///< 10 Secondary SDRAM Package Type 798 SPD4_MODULE_NOMINAL_VOLTAGE_STRUCT ModuleNominalVoltage; ///< 11 Module Nominal Voltage, VDD 799 SPD4_MODULE_ORGANIZATION_STRUCT ModuleOrganization; ///< 12 Module Organization 800 SPD4_MODULE_MEMORY_BUS_WIDTH_STRUCT ModuleMemoryBusWidth; ///< 13 Module Memory Bus Width 801 SPD4_MODULE_THERMAL_SENSOR_STRUCT ModuleThermalSensor; ///< 14 Module Thermal Sensor 802 SPD4_EXTENDED_MODULE_TYPE_STRUCT ExtendedModuleType; ///< 15 Extended Module Type 803 UINT8 Reserved0; ///< 16 Reserved 804 SPD4_TIMEBASE_STRUCT Timebase; ///< 17 Timebases 805 SPD4_TCK_MIN_MTB_STRUCT tCKmin; ///< 18 SDRAM Minimum Cycle Time (tCKmin) 806 SPD4_TCK_MAX_MTB_STRUCT tCKmax; ///< 19 SDRAM Maximum Cycle Time (tCKmax) 807 SPD4_CAS_LATENCIES_SUPPORTED_STRUCT CasLatencies; ///< 20-23 CAS Latencies Supported 808 SPD4_TAA_MIN_MTB_STRUCT tAAmin; ///< 24 Minimum CAS Latency Time (tAAmin) 809 SPD4_TRCD_MIN_MTB_STRUCT tRCDmin; ///< 25 Minimum RAS# to CAS# Delay Time (tRCDmin) 810 SPD4_TRP_MIN_MTB_STRUCT tRPmin; ///< 26 Minimum Row Precharge Delay Time (tRPmin) 811 SPD4_TRAS_TRC_MIN_MTB_STRUCT tRASMintRCMinUpper; ///< 27 Upper Nibbles for tRAS and tRC 812 SPD4_TRAS_MIN_MTB_STRUCT tRASmin; ///< 28 Minimum Active to Precharge Delay Time (tRASmin), Least Significant Byte 813 SPD4_TRC_MIN_MTB_STRUCT tRCmin; ///< 29 Minimum Active to Active/Refresh Delay Time (tRCmin), Least Significant Byte 814 SPD4_TRFC_MIN_MTB_STRUCT tRFC1min; ///< 30-31 Minimum Refresh Recovery Delay Time (tRFC1min) 815 SPD4_TRFC_MIN_MTB_STRUCT tRFC2min; ///< 32-33 Minimum Refresh Recovery Delay Time (tRFC2min) 816 SPD4_TRFC_MIN_MTB_STRUCT tRFC4min; ///< 34-35 Minimum Refresh Recovery Delay Time (tRFC4min) 817 SPD4_TFAW_MIN_MTB_UPPER_STRUCT tFAWMinUpper; ///< 36 Upper Nibble for tFAW 818 SPD4_TFAW_MIN_MTB_STRUCT tFAWmin; ///< 37 Minimum Four Activate Window Delay Time (tFAWmin) 819 SPD4_TRRD_MIN_MTB_STRUCT tRRD_Smin; ///< 38 Minimum Activate to Activate Delay Time (tRRD_Smin), different bank group 820 SPD4_TRRD_MIN_MTB_STRUCT tRRD_Lmin; ///< 39 Minimum Activate to Activate Delay Time (tRRD_Lmin), same bank group 821 SPD4_TCCD_MIN_MTB_STRUCT tCCD_Lmin; ///< 40 Minimum CAS to CAS Delay Time (tCCD_Lmin), Same Bank Group 822 SPD4_TWR_UPPER_NIBBLE_STRUCT tWRUpperNibble; ///< 41 Upper Nibble for tWRmin 823 SPD4_TWR_MIN_MTB_STRUCT tWRmin; ///< 42 Minimum Write Recovery Time (tWRmin) 824 SPD4_TWTR_UPPER_NIBBLE_STRUCT tWTRUpperNibble; ///< 43 Upper Nibbles for tWTRmin 825 SPD4_TWTR_MIN_MTB_STRUCT tWTR_Smin; ///< 44 Minimum Write to Read Time (tWTR_Smin), Different Bank Group 826 SPD4_TWTR_MIN_MTB_STRUCT tWTR_Lmin; ///< 45 Minimum Write to Read Time (tWTR_Lmin), Same Bank Group 827 UINT8 Reserved1[59 - 46 + 1]; ///< 46-59 Reserved 828 SPD4_CONNECTOR_BIT_MAPPING_BYTE_STRUCT BitMapping[77 - 60 + 1]; ///< 60-77 Connector to SDRAM Bit Mapping 829 UINT8 Reserved2[116 - 78 + 1]; ///< 78-116 Reserved 830 SPD4_TCCD_MIN_FTB_STRUCT tCCD_LminFine; ///< 117 Fine Offset for Minimum CAS to CAS Delay Time (tCCD_Lmin), same bank group 831 SPD4_TRRD_MIN_FTB_STRUCT tRRD_LminFine; ///< 118 Fine Offset for Minimum Activate to Activate Delay Time (tRRD_Lmin), different bank group 832 SPD4_TRRD_MIN_FTB_STRUCT tRRD_SminFine; ///< 119 Fine Offset for Minimum Activate to Activate Delay Time (tRRD_Smin), same bank group 833 SPD4_TRC_MIN_FTB_STRUCT tRCminFine; ///< 120 Fine Offset for Minimum Active to Active/Refresh Delay Time (tRCmin) 834 SPD4_TRP_MIN_FTB_STRUCT tRPminFine; ///< 121 Fine Offset for Minimum Row Precharge Delay Time (tRPabmin) 835 SPD4_TRCD_MIN_FTB_STRUCT tRCDminFine; ///< 122 Fine Offset for Minimum RAS# to CAS# Delay Time (tRCDmin) 836 SPD4_TAA_MIN_FTB_STRUCT tAAminFine; ///< 123 Fine Offset for Minimum CAS Latency Time (tAAmin) 837 SPD4_TCK_MAX_FTB_STRUCT tCKmaxFine; ///< 124 Fine Offset for SDRAM Minimum Cycle Time (tCKmax) 838 SPD4_TCK_MIN_FTB_STRUCT tCKminFine; ///< 125 Fine Offset for SDRAM Maximum Cycle Time (tCKmin) 839 SPD4_CYCLIC_REDUNDANCY_CODE Crc; ///< 126-127 Cyclical Redundancy Code (CRC) 840 } SPD4_BASE_SECTION; 841 842 typedef struct { 843 SPD4_UNBUF_MODULE_NOMINAL_HEIGHT ModuleNominalHeight; ///< 128 Module Nominal Height 844 SPD4_UNBUF_MODULE_NOMINAL_THICKNESS ModuleMaximumThickness; ///< 129 Module Maximum Thickness 845 SPD4_UNBUF_REFERENCE_RAW_CARD ReferenceRawCardUsed; ///< 130 Reference Raw Card Used 846 SPD4_UNBUF_ADDRESS_MAPPING AddressMappingEdgeConn; ///< 131 Address Mapping from Edge Connector to DRAM 847 UINT8 Reserved[253 - 132 + 1]; ///< 132-253 Reserved 848 SPD4_CYCLIC_REDUNDANCY_CODE Crc; ///< 254-255 Cyclical Redundancy Code (CRC) 849 } SPD4_MODULE_UNBUFFERED; 850 851 typedef struct { 852 SPD4_RDIMM_MODULE_NOMINAL_HEIGHT ModuleNominalHeight; ///< 128 Module Nominal Height 853 SPD4_RDIMM_MODULE_NOMINAL_THICKNESS ModuleMaximumThickness; ///< 129 Module Maximum Thickness 854 SPD4_RDIMM_REFERENCE_RAW_CARD ReferenceRawCardUsed; ///< 130 Reference Raw Card Used 855 SPD4_RDIMM_MODULE_ATTRIBUTES DimmModuleAttributes; ///< 131 DIMM Module Attributes 856 SPD4_RDIMM_THERMAL_HEAT_SPREADER_SOLUTION DimmThermalHeatSpreaderSolution; ///< 132 RDIMM Thermal Heat Spreader Solution 857 SPD4_MANUFACTURER_ID_CODE RegisterManufacturerIdCode; ///< 133-134 Register Manufacturer ID Code 858 SPD4_RDIMM_REGISTER_REVISION_NUMBER RegisterRevisionNumber; ///< 135 Register Revision Number 859 SPD4_RDIMM_ADDRESS_MAPPING_FROM_REGISTER_TO_DRAM AddressMappingFromRegisterToDRAM; ///< 136 Address Mapping from Register to DRAM 860 SPD4_RDIMM_REGISTER_OUTPUT_DRIVE_STRENGTH_FOR_CONTROL_COMMAND_ADDRESS RegisterOutputDriveStrengthForControlCommandAddress; ///< 137 Register Output Drive Strength for Control and Command Address 861 SPD4_RDIMM_REGISTER_OUTPUT_DRIVE_STRENGTH_FOR_CLOCK RegisterOutputDriveStrengthForClock; ///< 138 Register Output Drive Strength for Clock 862 UINT8 Reserved[253 - 139 + 1]; ///< 253-139 Reserved 863 SPD4_CYCLIC_REDUNDANCY_CODE Crc; ///< 254-255 Cyclical Redundancy Code (CRC) 864 } SPD4_MODULE_REGISTERED; 865 866 typedef struct { 867 SPD4_LRDIMM_MODULE_NOMINAL_HEIGHT ModuleNominalHeight; ///< 128 Module Nominal Height 868 SPD4_LRDIMM_MODULE_NOMINAL_THICKNESS ModuleMaximumThickness; ///< 129 Module Maximum Thickness 869 SPD4_LRDIMM_REFERENCE_RAW_CARD ReferenceRawCardUsed; ///< 130 Reference Raw Card Used 870 SPD4_LRDIMM_MODULE_ATTRIBUTES DimmModuleAttributes; ///< 131 DIMM Module Attributes 871 SPD4_LRDIMM_THERMAL_HEAT_SPREADER_SOLUTION ThermalHeatSpreaderSolution; ///< 132 RDIMM Thermal Heat Spreader Solution 872 SPD4_MANUFACTURER_ID_CODE RegisterManufacturerIdCode; ///< 133-134 Register Manufacturer ID Code 873 SPD4_LRDIMM_REGISTER_REVISION_NUMBER RegisterRevisionNumber; ///< 135 Register Revision Number 874 SPD4_LRDIMM_ADDRESS_MAPPING_FROM_REGISTER_TO_DRAM AddressMappingFromRegisterToDram; ///< 136 Address Mapping from Register to DRAM 875 SPD4_LRDIMM_REGISTER_OUTPUT_DRIVE_STRENGTH_FOR_CONTROL_COMMAND_ADDRESS RegisterOutputDriveStrengthForControlCommandAddress; ///< 137 Register Output Drive Strength for Control and Command Address 876 SPD4_LRDIMM_REGISTER_OUTPUT_DRIVE_STRENGTH_FOR_CLOCK RegisterOutputDriveStrengthForClock; ///< 138 Register Output Drive Strength for Clock 877 SPD4_LRDIMM_DATA_BUFFER_REVISION_NUMBER DataBufferRevisionNumber; ///< 139 Data Buffer Revision Number 878 SPD4_LRDIMM_DRAM_VREFDQ_FOR_PACKAGE_RANK DramVrefDQForPackageRank0; ///< 140 DRAM VrefDQ for Package Rank 0 879 SPD4_LRDIMM_DRAM_VREFDQ_FOR_PACKAGE_RANK DramVrefDQForPackageRank1; ///< 141 DRAM VrefDQ for Package Rank 1 880 SPD4_LRDIMM_DRAM_VREFDQ_FOR_PACKAGE_RANK DramVrefDQForPackageRank2; ///< 142 DRAM VrefDQ for Package Rank 2 881 SPD4_LRDIMM_DRAM_VREFDQ_FOR_PACKAGE_RANK DramVrefDQForPackageRank3; ///< 143 DRAM VrefDQ for Package Rank 3 882 SPD4_LRDIMM_DATA_BUFFER_VREFDQ_FOR_DRAM_INTERFACE DataBufferVrefDQForDramInterface; ///< 144 Data Buffer VrefDQ for DRAM Interface 883 SPD4_LRDIMM_DATA_BUFFER_MDQ_DRIVE_STRENGTH_RTT_FOR_DATA_RATE DataBufferMdqDriveStrengthRttForDataRateLe1866; ///< 145 Data Buffer MDQ Drive Strength and RTT for data rate <= 1866 884 SPD4_LRDIMM_DATA_BUFFER_MDQ_DRIVE_STRENGTH_RTT_FOR_DATA_RATE DataBufferMdqDriveStrengthRttForDataRateLe2400; ///< 146 Data Buffer MDQ Drive Strength and RTT for data rate <=2400 885 SPD4_LRDIMM_DATA_BUFFER_MDQ_DRIVE_STRENGTH_RTT_FOR_DATA_RATE DataBufferMdqDriveStrengthRttForDataRateLe3200; ///< 147 Data Buffer MDQ Drive Strength and RTT for data rate <=3200 886 SPD4_LRDIMM_DRAM_DRIVE_STRENGTH DramDriveStrength; ///< 148 DRAM Drive Strength 887 SPD4_LRDIMM_DRAM_ODT_RTT_WR_RTT_NOM_FOR_DATA_RATE DramOdtRttWrRttNomForDataRateLe1866; ///< 149 DRAM ODT (RTT_WR and RTT_NOM) for data rate <= 1866 888 SPD4_LRDIMM_DRAM_ODT_RTT_WR_RTT_NOM_FOR_DATA_RATE DramOdtRttWrRttNomForDataRateLe2400; ///< 150 DRAM ODT (RTT_WR and RTT_NOM) for data rate <= 2400 889 SPD4_LRDIMM_DRAM_ODT_RTT_WR_RTT_NOM_FOR_DATA_RATE DramOdtRttWrRttNomForDataRateLe3200; ///< 151 DRAM ODT (RTT_WR and RTT_NOM) for data rate <= 3200 890 SPD4_LRDIMM_DRAM_ODT_RTT_PARK_FOR_DATA_RATE DramOdtRttParkForDataRateLe1866; ///< 152 DRAM ODT (RTT_PARK) for data rate <= 1866 891 SPD4_LRDIMM_DRAM_ODT_RTT_PARK_FOR_DATA_RATE DramOdtRttParkForDataRateLe2400; ///< 153 DRAM ODT (RTT_PARK) for data rate <= 2400 892 SPD4_LRDIMM_DRAM_ODT_RTT_PARK_FOR_DATA_RATE DramOdtRttParkForDataRateLe3200; ///< 154 DRAM ODT (RTT_PARK) for data rate <= 3200 893 SPD4_LRDIMM_DATA_BUFFER_VREFDQ_FOR_DRAM_INTERFACE_RANGE DataBufferVrefDQForDramInterfaceRange; ///< 155 Data Buffer VrefDQ for DRAM Interface Range 894 SPD4_LRDIMM_DATA_BUFFER_DQ_DECISION_FEEDBACK_EQUALIZATION DataBufferDqDecisionFeedbackEqualization; ///< 156 Data Buffer DQ Decision Feedback Equalization 895 UINT8 Reserved[253 - 157 + 1]; ///< 253-132 Reserved 896 SPD4_CYCLIC_REDUNDANCY_CODE Crc; ///< 254-255 Cyclical Redundancy Code (CRC) 897 } SPD4_MODULE_LOADREDUCED; 898 899 typedef struct { 900 UINT8 Reserved0[191 - 128 + 1]; ///< 128-191 Reserved 901 SPD4_NVDIMM_MODULE_PRODUCT_IDENTIFIER ModuleProductIdentifier; ///< 192-193 Module Product Identifier 902 SPD4_NVDIMM_SUBSYSTEM_CONTROLLER_MANUFACTURER_ID_CODE SubsystemControllerManufacturerIdCode; ///< 194-195 Subsystem Controller Manufacturer's ID Code 903 SPD4_NVDIMM_SUBSYSTEM_CONTROLLER_IDENTIFIER SubsystemControllerIdentifier; ///< 196-197 Subsystem Controller Identifier 904 SPD4_NVDIMM_SUBSYSTEM_CONTROLLER_REVISION_CODE SubsystemControllerRevisionCode; ///< 198 Subsystem Controller Revision Code 905 SPD4_NVDIMM_REFERENCE_RAW_CARD ReferenceRawCardUsed; ///< 199 Reference Raw Card Used 906 SPD4_NVDIMM_MODULE_CHARACTERISTICS ModuleCharacteristics; ///< 200 Module Characteristics 907 SPD4_NVDIMM_HYBRID_MODULE_MEDIA_TYPES HybridModuleMediaTypes; ///< 201-202 Hybrid Module Media Types 908 SPD4_NVDIMM_MAXIMUM_NONVOLATILE_MEMORY_INITIALIZATION_TIME MaximumNonVolatileMemoryInitializationTime; ///< 203 Maximum Non-Volatile Memory Initialization Time 909 SPD4_NVDIMM_FUNCTION_INTERFACE_DESCRIPTOR FunctionInterfaceDescriptors[8]; ///< 204-219 Function Interface Descriptors 910 UINT8 Reserved[253 - 220 + 1]; ///< 220-253 Reserved 911 SPD4_CYCLIC_REDUNDANCY_CODE Crc; ///< 254-255 Cyclical Redundancy Code (CRC) 912 } SPD4_MODULE_NVDIMM; 913 914 typedef union { 915 SPD4_MODULE_UNBUFFERED Unbuffered; ///< 128-255 Unbuffered Memory Module Types 916 SPD4_MODULE_REGISTERED Registered; ///< 128-255 Registered Memory Module Types 917 SPD4_MODULE_LOADREDUCED LoadReduced; ///< 128-255 Load Reduced Memory Module Types 918 SPD4_MODULE_NVDIMM NonVolatile; ///< 128-255 Non-Volatile (NVDIMM-N) Hybrid Memory Parameters 919 } SPD4_MODULE_SPECIFIC; 920 921 typedef struct { 922 UINT8 ModulePartNumber[348 - 329 + 1]; ///< 329-348 Module Part Number 923 } SPD4_MODULE_PART_NUMBER; 924 925 typedef struct { 926 UINT8 ManufacturerSpecificData[381 - 353 + 1]; ///< 353-381 Manufacturer's Specific Data 927 } SPD4_MANUFACTURER_SPECIFIC; 928 929 typedef UINT8 SPD4_MODULE_REVISION_CODE;///< 349 Module Revision Code 930 typedef UINT8 SPD4_DRAM_STEPPING; ///< 352 Dram Stepping 931 932 typedef struct { 933 SPD4_UNIQUE_MODULE_ID ModuleId; ///< 320-328 Unique Module ID 934 SPD4_MODULE_PART_NUMBER ModulePartNumber; ///< 329-348 Module Part Number 935 SPD4_MODULE_REVISION_CODE ModuleRevisionCode; ///< 349 Module Revision Code 936 SPD4_MANUFACTURER_ID_CODE DramIdCode; ///< 350-351 Dram Manufacturer ID Code 937 SPD4_DRAM_STEPPING DramStepping; ///< 352 Dram Stepping 938 SPD4_MANUFACTURER_SPECIFIC ManufacturerSpecificData; ///< 353-381 Manufacturer's Specific Data 939 UINT8 Reserved[2]; ///< 382-383 Reserved 940 } SPD4_MANUFACTURING_DATA; 941 942 typedef struct { 943 UINT8 Reserved[511 - 384 + 1]; ///< 384-511 Unbuffered Memory Module Types 944 } SPD4_END_USER_SECTION; 945 946 /// 947 /// DDR4 Serial Presence Detect structure 948 /// 949 typedef struct { 950 SPD4_BASE_SECTION Base; ///< 0-127 Base Configuration and DRAM Parameters 951 SPD4_MODULE_SPECIFIC Module; ///< 128-255 Module-Specific Section 952 UINT8 Reserved[319 - 256 + 1]; ///< 256-319 Reserved 953 SPD4_MANUFACTURING_DATA ManufactureInfo; ///< 320-383 Manufacturing Information 954 SPD4_END_USER_SECTION EndUser; ///< 384-511 End User Programmable 955 } SPD_DDR4; 956 957 #pragma pack (pop) 958 #endif 959