| Top side | Bottom side | ||
| 1 | 2 | 3.3V | |
| 3 | Reserved**** | 4 | GND |
| 5 | Reserved**** | 6 |
1.5V |
| 7 | CLKREQ# | 8 | VCC** |
| 9 | GND | 10 | I/O** |
| 11 | REFCLK- | 12 | CLK** |
| 13 | REFCLK+ | 14 | RST** |
| 15 | N/C or GND | 16 | VPP** |
| Mechanical key | |||
| 17 | Reserved | 18 | GND |
| 19 | Reserved | 20 | Reserved*** |
| 21 | GND | 22 | PERST# |
| 23 | PERn0 | 24 | +3.3Vaux |
| 25 | PERp0 | 26 | GND |
| 27 | GND | 28 | +1.5V |
| 29 | GND | 30 | SMB_CLK |
| 31 | PETn0 | 32 | SMB_DATA |
| 33 | PETp0 | 34 | GND |
| 35 | GND | 36 | USB_D- |
| 37 | Reserved* | 38 | USB_D+ |
| 39 | Reserved* | 40 | GND |
| 41 | Reserved* | 42 | LED_WWAN# |
| 43 | Reserved* | 44 | LED_WLAN# |
| 45 | Reserved* | 46 | LED_WPAN# |
| 47 | Reserved* | 48 | +1.5V |
| 49 | Reserved* | 50 | GND |
| 51 | Reserved* | 52 | +3.3V |
*Reserved for future second PCI Express Lane (if needed)
**Reserved for future Subscriber Identity Module (SIM) interface (if needed)
***Reserved for future wireless disable signal (if needed)
****Reserved for future wireless coexistence control interface (if needed)


