M.2 (NGFF) Key M Connector (NVMe SSD)
Standard 75-position M.2 Key M edge connector interface (notch at pins 59-66) supporting PCIe 3.0/4.0/5.0 x4 lanes, SATA III, SMBus, and 3.3V power for high-performance NVMe Solid-State Drives.
Aliase:M.2 Key M, M.2 NVMe, PCIe M.2, NGFF Key M, 2280 NVMe SSD
M.2 Key M Edge Connector (Front View)
67 Pins
Pinout Table67
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | GND | Ground | Ground |
| 2 | +3.3V | Power | +3.3V DC Power Supply |
| 3 | GND | Ground | Ground |
| 4 | +3.3V | Power | +3.3V DC Power Supply |
| 5 | PETn3 | Digital | PCIe TX Lane 3 (Negative) |
| 6 | NC | NC | Not Connected / Reserved |
| 7 | PETp3 | Digital | PCIe TX Lane 3 (Positive) |
| 8 | NC | NC | Not Connected / Reserved |
| 9 | GND | Ground | Ground |
| 10 | LED1# | Digital | Drive Activity Indicator (Active Low) |
| 11 | PERn3 | Digital | PCIe RX Lane 3 (Negative) |
| 12 | +3.3V | Power | +3.3V DC Power Supply |
| 13 | PERp3 | Digital | PCIe RX Lane 3 (Positive) |
| 14 | +3.3V | Power | +3.3V DC Power Supply |
| 15 | GND | Ground | Ground |
| 16 | +3.3V | Power | +3.3V DC Power Supply |
| 17 | PETn2 | Digital | PCIe TX Lane 2 (Negative) |
| 18 | +3.3V | Power | +3.3V DC Power Supply |
| 19 | PETp2 | Digital | PCIe TX Lane 2 (Positive) |
| 20 | NC | NC | Not Connected |
| 21 | GND | Ground | Ground |
| 22 | NC | NC | Not Connected |
| 23 | PERn2 | Digital | PCIe RX Lane 2 (Negative) |
| 24 | NC | NC | Not Connected |
| 25 | PERp2 | Digital | PCIe RX Lane 2 (Positive) |
| 26 | NC | NC | Not Connected |
| 27 | GND | Ground | Ground |
| 28 | NC | NC | Not Connected |
| 29 | PETn1 | Digital | PCIe TX Lane 1 (Negative) / SATA-B- |
| 30 | NC | NC | Not Connected |
| 31 | PETp1 | Digital | PCIe TX Lane 1 (Positive) / SATA-B+ |
| 32 | NC | NC | Not Connected |
| 33 | GND | Ground | Ground |
| 34 | NC | NC | Not Connected |
| 35 | PERn1 | Digital | PCIe RX Lane 1 (Negative) / SATA-A- |
| 36 | NC | NC | Not Connected |
| 37 | PERp1 | Digital | PCIe RX Lane 1 (Positive) / SATA-A+ |
| 38 | DEVSLP | Digital | SATA Device Sleep Control |
| 39 | GND | Ground | Ground |
| 40 | SMB_CLK | Digital | SMBus Clock (System Management) |
| 41 | PETn0 | Digital | PCIe TX Lane 0 (Negative) |
| 42 | SMB_DATA | Digital | SMBus Data (System Management) |
| 43 | PETp0 | Digital | PCIe TX Lane 0 (Positive) |
| 44 | ALERT# | Digital | SMBus Alert Interrupt (Active Low) |
| 45 | GND | Ground | Ground |
| 46 | NC | NC | Not Connected |
| 47 | PERn0 | Digital | PCIe RX Lane 0 (Negative) |
| 48 | NC | NC | Not Connected |
| 49 | PERp0 | Digital | PCIe RX Lane 0 (Positive) |
| 50 | PERST# | Digital | PCIe Fundamental Reset (Active Low) |
| 51 | GND | Ground | Ground |
| 52 | CLKREQ# | Digital | PCIe Reference Clock Request (Active Low) |
| 53 | REFCLKn | Digital | PCIe 100MHz Reference Clock (Negative) |
| 54 | PEWAKE# | Digital | PCIe Wake Event Indicator (Active Low) |
| 55 | REFCLKp | Digital | PCIe 100MHz Reference Clock (Positive) |
| 56 | MFG1 | NC | Manufacturing Pin 1 |
| 57 | GND | Ground | Ground |
| 58 | MFG2 | NC | Manufacturing Pin 2 |
| 67 | NC | NC | Not Connected |
| 68 | SUSCLK | Digital | 32.768 kHz Suspend Clock |
| 69 | PEDET | Digital | PCIe/SATA Mode Detect Pin (GND=SATA / Open=PCIe) |
| 70 | +3.3V | Power | +3.3V DC Power Supply |
| 71 | GND | Ground | Ground |
| 72 | +3.3V | Power | +3.3V DC Power Supply |
| 73 | GND | Ground | Ground |
| 74 | +3.3V | Power | +3.3V DC Power Supply |
| 75 | GND | Ground | Ground |