3.5"-SBC-VR1000 - User Guide, Rev. 1.7
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7.14.
M.2 Key M Socket (M2M2)
The 3.5"-SBC-VR1000 supports M.2 modules in format 2280 with Key M. The M.2 specification supports PCIe x4
signals. The slot can be used to integrate an M.2 PCIe x4 SSD (NVMe) to the mainboard.
Figure 27: M.2 Key M Socket M2M2
Table 35: Pin Assignment M2M2
Pin
Signal
Description
Note
1
GND
Ground
2
+3.3V
3.3 V power supply
3
GND
Ground
4
+3.3V
3.3 V power supply
5
M2M_RXN3
PCIe Lane 3 receiver pair (-)
6
NC
No connection
7
M2M_RXP3
PCIe Lane 3 receiver pair (+)
8
NC
No connection
9
GND
Ground
10
M2M_LED1#
Open drain, active low signal for status LED driving
11
M2M_TXN3
PCIe Lane 3 transmitter pair (-)
12
+3.3V
3.3 V power supply
13
M2M_TXP3
PCIe Lane 3 transmitter pair (+)
14
+3.3V
3.3 V power supply
15
GND
Ground
16
+3.3V
3.3 V power supply
17
M2M_RXN2
PCIe Lane 2 receiver pair (-)
18
+3.3V
3.3 V power supply
19
M2M_RXP2
PCIe Lane 2 receiver pair (+)
20
NC
No connection
21
GND
Ground
22
NC
No connection
23
M2M_TXN2
PCIe Lane 2 transmitter pair (-)
24
NC
No connection
25
M2M_TXP2
PCIe Lane 2 transmitter pair (+)
26
NC
No connection