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PCI Express M.2 Specification
June 26, 2019
PCI Express M.2 Specification
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Revision 3.0, Version 1.2
Table 3-22. Socket 2 Key C WWAN Adapter Pinout .............................................................................. 157
Table 3-23. Socket 3 System Interface Signal Table .............................................................................. 158
Table 3-24. Socket 3 SATA-based Adapter Pinouts (Key M) ................................................................. 161
Table 3-25. Socket 3 PCIe-based Adapter Pinouts (Key M) ................................................................... 162
Table 3-26. BGA SSD System Interface Signal Table for Types 1620, 2024, 2228, and 2828 ............ 163
Table 3-27. BGA SSD System Interface Signal Table for Type 1113..................................................... 165
Table 4-1. DC Specification for 3.3 V Logic Signaling .......................................................................... 174
Table 4-2. DC Specification for 1.8 V Logic Signaling .......................................................................... 175
Table 4-3. Power Ramp Timing ............................................................................................................ 177
Table 4-4. Power Rail Slew Rate .......................................................................................................... 178
Table 4-5. Regulated Power Rail Parameters for BGA SSD Types ..................................................... 178
Table 4-6. Key Regulated Power Rail Parameters ............................................................................... 179
Table 4-7. Key V
BAT
Power Rail Parameters ......................................................................................... 180
Table 4-8. Power Rating Table for M.2 Add-in Cards ........................................................................... 180
Table 5-1. Mechanical Key Assignments .............................................................................................. 183
Table 5-2. Socket 1 Versions ................................................................................................................ 183
Table 5-3. DisplayPort Based Socket 1 Pinout Diagram (Mechanical Key A) On Platform ................. 185
Table 5-4. SDIO Based Socket 1 Pinout Diagram (Mechanical Key E) On Platform .......................... 187
Table 5-5. Socket 2 Add-in Card Configuration Table .......................................................................... 189
Table 5-6. Socket 2 Pinout Diagram (Mechanical Key B) On Platform ................................................ 191
Table 5-7. Socket 2 Pinout Diagram (Mechanical Key C) On Platform ................................................ 193
Table 5-8. Socket 3 SSD Pinout (Mechanical Key M) On Platform ...................................................... 194
Table 6-1. Signal Integrity Parameters and Test Procedures for M.2 Connectors .............................. 204
Table 6-2. Example of Prepared Wire with Plug ................................................................................... 216
Table 6-3. Contact Resistance for the Sample Wires/Plugs ................................................................. 217
Table 6-4. Assumptions for Typical Components and Dissipation........................................................ 218
Table 6-5. Maximum Dissipation for WWAN Adapters ......................................................................... 219
Table 6-6. Generic Assumptions for Package Designations and Types Expected to
Populate Adapters ............................................................................................................... 219
Table 6-7. Assumptions for Generic System Environments ................................................................. 220
Table 6-8. Slot Definitions, Systems with Fans ..................................................................................... 221
Table 6-9. Slot Definitions, Systems without Fans ................................................................................ 221
Table 6-10. Example Use Case Applicable to Adapters for Notebooks ................................................. 224
Table 6-11. Thermal Design Power Response – Notebook Category .................................................... 228
Table 6-12. Skin Temperature Limit Assumptions, Notebook ................................................................. 228
Table 6-13. Skin Temperature Effect of Adapter Position ....................................................................... 229
Table 6-14. Use Cases Applicable to Adapters for Thin Platform Notebook with Fan .......................... 229
Table 6-15. Thermal Design Power Response – Thin Platform Notebook with Fan Category ............... 234
Table 6-16. Skin Temperature Limit Assumptions, Thin Platform Notebook with Fan ........................... 234