M.2 (NGFF) Key B Connector (WWAN & SATA SSD)
Standard 75-position M.2 Key B edge connector interface (notch at pins 12-19) providing PCIe x2, SATA, USB 2.0/3.0, and SIM card (UIM) signals for cellular modems and legacy SATA SSDs.
Aliase:M.2 Key B, NGFF Key B, M.2 WWAN, 4G/5G Modem Card, M.2 SATA SSD
M.2 Key B Edge Connector (Front View)
67 Pins
Pinout Table67
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | CONFIG_3 | Ground | Configuration Pin 3 (GND/Open for Module ID) |
| 2 | +3.3V | Power | +3.3V DC Power Supply |
| 3 | GND | Ground | Ground |
| 4 | +3.3V | Power | +3.3V DC Power Supply |
| 5 | GND | Ground | Ground |
| 6 | FULL_CARD_PWR_OFF# | Digital | WWAN Full Card Power Off Control (Active Low) |
| 7 | USB_D+ | Digital | USB 2.0 Differential Data (Positive) |
| 8 | W_DISABLE1# | Digital | WWAN Disable Control (Active Low) |
| 9 | USB_D- | Digital | USB 2.0 Differential Data (Negative) |
| 10 | LED1# | Digital | WWAN / SSD Activity LED (Active Low) |
| 11 | GND | Ground | Ground |
| 20 | NC | NC | Not Connected |
| 21 | CONFIG_0 | Ground | Configuration Pin 0 |
| 22 | NC | NC | Not Connected |
| 23 | RESET# | Digital | WWAN Reset (Active Low) |
| 24 | NC | NC | Not Connected |
| 25 | NC | NC | Not Connected |
| 26 | W_DISABLE2# | Digital | GNSS / GPS Disable Control (Active Low) |
| 27 | GND | Ground | Ground |
| 28 | NC | NC | Not Connected |
| 29 | SSRXn | Digital | USB 3.0 / PCIe RX Lane 1 (Negative) / SATA-B- |
| 30 | UIM_RESET | Digital | SIM Card Reset Signal |
| 31 | SSRXp | Digital | USB 3.0 / PCIe RX Lane 1 (Positive) / SATA-B+ |
| 32 | UIM_CLK | Digital | SIM Card Clock Signal |
| 33 | GND | Ground | Ground |
| 34 | UIM_DATA | Digital | SIM Card I/O Data Line |
| 35 | SSTXn | Digital | USB 3.0 / PCIe TX Lane 1 (Negative) / SATA-A- |
| 36 | UIM_PWR | Power | SIM Card Power Supply (1.8V / 3.0V) |
| 37 | SSTXp | Digital | USB 3.0 / PCIe TX Lane 1 (Positive) / SATA-A+ |
| 38 | DEVSLP | Digital | SATA Device Sleep Control |
| 39 | GND | Ground | Ground |
| 40 | NC | NC | Not Connected |
| 41 | PETn0 | Digital | PCIe TX Lane 0 (Negative) |
| 42 | NC | NC | Not Connected |
| 43 | PETp0 | Digital | PCIe TX Lane 0 (Positive) |
| 44 | NC | NC | Not Connected |
| 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 Reset (Active Low) |
| 51 | GND | Ground | Ground |
| 52 | CLKREQ# | Digital | PCIe Clock Request (Active Low) |
| 53 | REFCLKn | Digital | PCIe Reference Clock (Negative) |
| 54 | PEWAKE# | Digital | PCIe Wake Event (Active Low) |
| 55 | REFCLKp | Digital | PCIe Reference Clock (Positive) |
| 56 | NC | NC | Not Connected |
| 57 | GND | Ground | Ground |
| 58 | NC | NC | Not Connected |
| 59 | NC | NC | Not Connected |
| 60 | NC | NC | Not Connected |
| 61 | NC | NC | Not Connected |
| 62 | NC | NC | Not Connected |
| 63 | NC | NC | Not Connected |
| 64 | NC | NC | Not Connected |
| 65 | NC | NC | Not Connected |
| 66 | SIM_DETECT | Digital | SIM Card Detect Switch |
| 67 | RESET# | Digital | System Reset (Active Low) |
| 68 | SUSCLK | Digital | 32.768 kHz Suspend Clock |
| 69 | CONFIG_1 | Ground | Configuration Pin 1 (GND/Open for Module ID) |
| 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 | CONFIG_2 | Ground | Configuration Pin 2 (GND/Open for Module ID) |