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3.3.10 M.2 3042 Socket 2 Key B WWAN Slot
M.2 WWAN Slot (Socket 2 Key B type 3042) - CN20
Pin
Signal
Pin
1
CONFIG_3
3
GND
5
GND
7
USB_P4+
9
USB_P4-
11
GND
21
CONFIG_0
23
WAKE_ON_WWAN#
25
---
27
GND
29
USB_SSRX4-
31
USB_SSRX4+
33
GND
35
USB_SSTX4-
37
USB_SSTX4+
39
GND
41
PCIe1_Rx-
43
PCIe1_Rx+
45
GND
47
PCIe1_Tx-
49
PCIe1_Tx+
51
GND
53
PCIe1_CLK-
55
PCIe1_CLK+
57
GND
59
---
SBC-C90
SBC-C90 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by C.M. Copyright © 2021 SECO S.p.A.
Signal
2
+3.3V_ALW
4
+3.3V_ALW
6
PWR_OFF#
8
W_DISABLE1#
10
---
20
---
22
---
24
---
26
W_DISABLE2#
28
---
30
UIM_RST#
32
UIM_CLK
34
UIM_DATA
36
UIM_PWR
38
---
40
---
42
---
44
---
46
---
48
---
50
PCIE_RST#
52
CLK_REQ1#
54
M.2_WAKE#
56
---
58
---
60
---
It is possible to increase the networking possibilities of SBC-C90
board by using M.2 Socket 2 Key B WWAN modules (i.e.
modem modules).
The connector used for the M.2 WWAN slot is CN20, which is a
standard 75 pin M.2 Key B connector, type LOTES p/n
APCI0087-P001A, H=8.5mm, with the pinout shown in the table
on the left.
On the SBC-C90 board there is also a Threaded Spacer which
allows the placement of M.2 Socket 2 Key B WWAN modules in
2242 or 3042 size.
61
---
63
---
65
---
67
---
69
CONFIG_1
71
CLK_REQ2#
73
GND
75
CONFIG_2
Signal Description
USB_P4+ / USB_P4-: USB Port #4 differential pair
USB_SSRX4+/USB_SSRX4-: USB Super Speed Port #2 receive differential pair
USB_SSTX4+/USB_SSTX4-: USB Super Speed Port #2 transmit differential pair
PCIe1_Tx+/PCIe1_Tx-: PCI Express lane #1, Transmitting Output Differential pair
PCIe1_Rx+/PCIe1_Rx-: PCI Express lane #1, Receiving Input Differential pair
PCIe1_CLK+/ PCIe1_CLK-: PCI Express Reference Clock for lane #1, Differential Pair
WAKE_ON_WWAN#:
Wake Input, 1.8V_ALW active low signal with 100kΩ pull-up
resistor. It must be externally driven by the Connectivity module plugged in the slot when it
requires waking up the system.
62
---
64
---
66
---
68
SUS_CLK
70
+3.3V_ALW
72
+3.3V_ALW
74
+3.3V_ALW
34
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