Mini PCIe - blame None – Helium Repurposed

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609cfd	Peter van Dijk	2026-02-03 23:00:40	1	# Mini PCIe
			2
			3	[pinout at allpinouts.org](https://allpinouts.org/pinouts/connectors/buses/pci-express-card-and-pci-express-mini-card/)
			4
			5	[pinout at pinoutguide.com](https://pinoutguide.com/Slots/mini_pcie_pinout.shtml)
			6
			7	[random PDF (1.2, older revision) of the spec)](https://heap.ovh/files/mPCIe-electromechanical.pdf)
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			9	Labels in Top side/Bottom side column are from spec.
e61b1d	Peter van Dijk	2026-02-03 23:17:46	10	Spec labels mostly taken from pinoutguide.com for now, see there for * footnote meanings.
609cfd	Peter van Dijk	2026-02-03 23:00:40	11
8889b3	Peter van Dijk	2026-02-03 23:28:04	12	"Common in devices" means these pins have been spotted in Helium miners/lorawan gateways.
			13	Zero of the observed mPCIe slots had -all- of the observed pins.
			14
e61b1d	Peter van Dijk	2026-02-03 23:17:46	15	\| Common in devices \| Spec label \| Top side \| Bottom side \| Spec label \| Common in devices \|
			16	\| ----------------- \| ------------ \| -------- \| ----------- \| ----------- \| ----------------- \|
2bda62	Peter van Dijk	2026-02-03 23:23:08	17	\| \| WAKE# \| 1 \| 2 \| 3.3V \| 3.3V \|
e61b1d	Peter van Dijk	2026-02-03 23:17:46	18	\| \| Reserved**** \| 3 \| 4 \| GND \| GND \|
			19	\| \| Reserved**** \| 5 \| 6 \| 1.5V \| \|
d1d11b	Peter van Dijk	2026-02-03 23:28:32	20	\| \| CLKREQ# \| 7 \| 8 \| VCC** \| SIM_VCC \|
8889b3	Peter van Dijk	2026-02-03 23:28:04	21	\| GND \| GND \| 9 \| 10 \| I/O** \| SIM_DATA \|
			22	\| \| REFCLK- \| 11 \| 12 \| CLK** \| SIM_CLK \|
			23	\| \| REFCLK+ \| 13 \| 14 \| RST** \| SIM_RST \|
e61b1d	Peter van Dijk	2026-02-03 23:17:46	24	\| GND \| N/C or GND \| 15 \| 16 \| VPP** \| \|
			25	\| \| \| key \| key \| \| \|
3360ba	Peter van Dijk	2026-02-03 23:20:54	26	\| GND or NC \| Reserved \| 17 \| 18 \| GND \| GND \|
a98e0f	Peter van Dijk	2026-02-03 23:21:17	27	\| GPS_PPS \| Reserved \| 19 \| 20 \| Reserved*** \| \|
e61b1d	Peter van Dijk	2026-02-03 23:17:46	28	\| GND \| GND \| 21 \| 22 \| PERST# \| RESET \|
2bda62	Peter van Dijk	2026-02-03 23:23:08	29	\| \| PERn0 \| 23 \| 24 \| +3.3Vaux \| 3.3V \|
e61b1d	Peter van Dijk	2026-02-03 23:17:46	30	\| \| PERp0 \| 25 \| 26 \| GND \| GND \|
			31	\| GND \| GND \| 27 \| 28 \| +1.5V \| \|
8889b3	Peter van Dijk	2026-02-03 23:28:04	32	\| GND \| GND \| 29 \| 30 \| SMB_CLK \| I2C_SCL \|
			33	\| \| PETn0 \| 31 \| 32 \| SMB_DATA \| I2C_SDA \|
e61b1d	Peter van Dijk	2026-02-03 23:17:46	34	\| \| PETp0 \| 33 \| 34 \| GND \| GND \|
8889b3	Peter van Dijk	2026-02-03 23:28:04	35	\| GND \| GND \| 35 \| 36 \| USB_D- \| USB_D- \|
			36	\| GND \| Reserved* \| 37 \| 38 \| USB_D+ \| USB_D+ \|
2bda62	Peter van Dijk	2026-02-03 23:23:08	37	\| 3.3V \| Reserved* \| 39 \| 40 \| GND \| GND \|
			38	\| 3.3V \| Reserved* \| 41 \| 42 \| LED_WWAN# \| \|
e61b1d	Peter van Dijk	2026-02-03 23:17:46	39	\| GND \| Reserved* \| 43 \| 44 \| LED_WLAN# \| \|
			40	\| SPI CLK \| Reserved* \| 45 \| 46 \| LED_WPAN# \| \|
			41	\| SPI MISO \| Reserved* \| 47 \| 48 \| +1.5V \| \|
			42	\| SPI MOSI \| Reserved* \| 49 \| 50 \| GND \| GND \|
2bda62	Peter van Dijk	2026-02-03 23:23:08	43	\| SPI CE \| Reserved* \| 51 \| 52 \| +3.3V \| 3.3V \|