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3.3.12 M.2 WLAN Key E Slot
M.2 Connectivity Slot (Socket 1 Key E type 2230)
Pin
Signal
1
GND
3
USB4+
5
USB4-
7
GND
9
---
11
---
13
---
15
---
17
---
19
---
21
---
23
---
33
GND
35
PCIe_B_Tx+_M2
37
PCIe_B_Tx-_M2
39
GND
41
PCIe_B_Rx+_M2
43
PCIe_B_Rx-_M2
45
GND
47
PCIe_B_CLK+_M2
49
PCIe_B_CLK-_M2
51
GND
53
PCIE_B_CLKREQ#
CSM-B79
CSM-B79 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: A.R - Reviewed by S.R. - Copyright © 2021 SECO S.p.A.
CN36
Pin
Signal
2
+3.3V_ALW
4
+3.3V_ALW
6
LED_1#
8
---
10
---
12
---
14
---
16
LED_2#
18
GND
20
---
22
---
32
---
34
---
36
---
38
---
40
---
42
---
44
---
46
---
48
---
50
---
52
PCIe_B_RST#
54
W_DISABLE2#_E
On CSM-B79 carrier board, to add communications
functionality, it is available a dedicated M.2 Key E Slot
for WLAN connectivity (WiFi/BT), which allows plugging
modules with USB 2.0 and/or PCI-e x1 interface.
The connector used for the M.2 Connectivity slot is
CN36, which is a standard 75 pin M.2 Key E connector,
type LOTES p/n APCI0076-P001A, H=4.2mm, with the
pinout shown in the table on the left.
On-board there is also a Threaded Spacer which allows the placement of M.2
Socket 1 Key E connectivity modules in 2230 size.
Please be aware that PCI-e interface will be available on this slot only if:
®
Used SMARC
modules offer at least 2x PCI-e x1 interfaces (since it is connected
to PCI-e port #B), AND configure properly 2-4 position of the dual DIP switch SW17,
according to the table at par.3.3.11
55
PCIe_WAKE#
57
GND
59
---
61
---
63
GND
65
---
67
---
69
GND
71
---
73
---
75
GND
56
W_DISABLE1#_E
58
---
60
---
62
---
64
---
66
---
68
---
70
---
72
+3.3V_ALW
74
+3.3V_ALW
51
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