---
title: M.2 port
slug: one/hardware/m2-port
docTags: 
createdAt: 2026-06-10T18:09:42.876Z
---

![Flipper One M.2 expansion port](https://api.archbee.com/api/optimize/3StCFqarJkJQZV-7N79yY/mdvI9vpgyMQ99LyHjD2LF_m2-expansion-port.png)

The M.2 port is an internal expansion slot for cellular modems, Wi-Fi, SDR, NVMe SSDs, GNSS modules, AI accelerators, and similar off-the-shelf M.2 modules. It sits at the back of the device, under the Back Plate.

Tech specs:

- **M.2 type:** Key B
- **Supported sizes:** 2230(via extender), 2242, 3042, 3052
- **Supported thickness:** up to S3 (single-sided modules)
- **Interfaces:** PCIe 2.1 ×1 / USB 2.0 / USB 3.1 / SATA3 / Serial Audio / UART / I²C / SIM card + eSIM

***

## M.2 port schematic

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***

## M.2 port pinout

![Flipper One M.2 port pinout](https://api.archbee.com/api/optimize/3StCFqarJkJQZV-7N79yY/okplzNF2D9XaQ7Iss1JHn_m2-port-pinout.jpg)

| **Description**                             | **PIN** | **PIN** | **Description**           |
| ------------------------------------------- | ------- | ------- | ------------------------- |
| —                                           | **—**   | **1**   | CONFIG\_3                 |
| 3.3V                                        | **2**   | **3**   | GND                       |
| 3.3V                                        | **4**   | **5**   | GND                       |
| FULL\_CARD\_POWER\_OFF# (O)(0/1.8V or 3.3V) | **6**   | **7**   | USB\_D+                   |
| W\_DISABLE1# (O)(0/1.8V/3.3V)               | **8**   | **9**   | USB\_D-                   |
| GPIO\_9/DAS/DSS (I/O)/LED\_1# (I)(0/3.3V)   | **10**  | **11**  | GND                       |
| CONNECTOR KEY B                             | **—**   | **—**   | CONNECTOR KEY B           |
| GPIO\_5 (I/O)(0/1.8V)                       | **20**  | **21**  | CONFIG\_0                 |
| GPIO\_6 (I/O)(0/1.8V)                       | **22**  | **23**  | GPIO\_11 (I/O)(0/1.8V)    |
| GPIO\_7 (I/O)(0/1.8V)                       | **24**  | **25**  | DPR (O)(0/1.8V)           |
| GPIO\_10 (I/O)(0/1.8V)                      | **26**  | **27**  | GND                       |
| PLA\_S2# (I)/GPIO\_8 (I/O)(0/1.8V)          | **28**  | **29**  | PERn1/USB3.1-Rx-/SSIC-RxN |
| UIM\_RESET (I)                              | **30**  | **31**  | PERp1/USB3.1-Rx+/SSIC-RxP |
| UIM\_CLK (I)                                | **32**  | **33**  | GND                       |
| UIM\_DATA (I/O)                             | **34**  | **35**  | PETn1/USB3.1-Tx-/SSIC-TxN |
| UIM\_PWR (I)                                | **36**  | **37**  | PETp1/USB3.1-Tx+/SSIC-TxP |
| DEVSLP (O)                                  | **38**  | **39**  | GND                       |
| GPIO\_0 (I/O)/SMB\_CLK (I/O)/(0/1.8V)       | **40**  | **41**  | PERn0/SATA-B+             |
| GPIO\_1 (I/O)/SMB\_DATA (I/O)/(0/1.8V)      | **42**  | **43**  | PERp0/SATA-B-             |
| GPIO\_2 (I/O)/ALERT# (I)(0/1.8V)            | **44**  | **45**  | GND                       |
| GPIO\_3 (I/O)(0/1.8V)                       | **46**  | **47**  | PETn0/SATA-A-             |
| GPIO\_4 (I/O)(0/1.8V)                       | **48**  | **49**  | PETp0/SATA-A+             |
| PERST# (O)(0/1.8V/3.3V)                     | **50**  | **51**  | GND                       |
| CLKREQ# (I/O)(0/1.8V/3.3V)                  | **52**  | **53**  | REFCLKn                   |
| PEWAKE# (I/O)(0/1.8V/3.3V)                  | **54**  | **55**  | REFCLKp                   |
| NC                                          | **56**  | **57**  | GND                       |
| NC                                          | **58**  | **59**  | ANTCTL0 (I)(0/1.8V)       |
| COEX3 (I/O)(0/1.8V)                         | **60**  | **61**  | ANTCTL1 (I)(0/1.8V)       |
| COEX\_TXD (O)(0/1.8V)                       | **62**  | **63**  | ANTCTL2 (I)(0/1.8V)       |
| COEX\_RXD (I)(0/1.8V)                       | **64**  | **65**  | ANTCTL3 (I)(0/1.8V)       |
| SIM DETECT (O)                              | **66**  | **67**  | RESET# (O)(0/1.8V)        |
| SUSCLK (O)(0/1.8V/3.3V)                     | **68**  | **69**  | CONFIG\_1                 |
| 3.3 V/VBAT                                  | **70**  | **71**  | GND                       |
| 3.3 V/VBAT                                  | **72**  | **73**  | VIO\_CFG (I) or GND       |
| 3.3 V/VBAT                                  | **74**  | **75**  | CONFIG\_2                 |