SBC-C23
SBC-C23 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: S.B. - Reviewed by L.B. -Copyright © 2020 SECO S.p.A.
25
3.3.5
M.2 WWAN Slot: Socket 2 Key B type 2242
The networking capabilities of the SBC-C23 board are
completed by an M.2 WWAN Slot, which allow plugging M.2
Socket 2 Key B WWAN Modules with USB 2.0 interface.
The connector used for the M.2 Connectivity slot is CN12,
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-C23 board there is also a Threaded Spacer
which allows the placement of M.2 Socket 2 Key B SSD
modules in 2242 size.
Here following the signals available on this slot:
/USB_DS1-: USB Hub Downstream Port #1 differential pair.
FULL_CARD_POWER_OFF#: Power Off signal for plugged modules, usually used in battery-
powered systems, 100k
Ω
pull-up @ NVCC_3V0. Managed through i.MX6SX pin RGMII1_RD2.
W_DISABLE#: M.2 module disable signal, 100k
Ω
pull-up @ NVCC_1V8 active low output.
Managed through i.MX6SX pin RGMII1_RD3
UIM_RST: Reset signal line, sent from M.2 Connectivity card to the SIM Card Slot or eSIM
.
UIM_DATA: Bidirectional Data line between M.2 Connectivity card and the SIM Card Slot or
..
UIM_CLK: Clock line, output from M.2 Connectivity card to the SIM Card Slot or eSIM onboard
..
UIM_VDD: Power line for the
configuration).
M2_LED#: Active Low signal, can be used by the module to drive a Green LED available on
C23 board, specific for M.2 Key B Slot functionalities.
M2_DPR_1V8: M.2 Dynamic Power Reduction Output, NVCC_1V8 signal directly managed
through i.MX6SX pin KEY_COL1
M.2 Key B Slot CN12
Pin Signal
Pin Signal
1
---
2
+3.3V_ALW
3
GND
4
+3.3V_ALW
5
GND
6
FULL_CARD_PWR_OFF#
7
8
---
9
USB_DS1-
10
M2_LED#
11
GND
20
---
21
---
22
---
23
---
24
---
25
M2_DPR_1V8
26
W_DISABLE#
27
GND
28
---
29
---
30
USIM_RST
31
---
32
USIM_CLK
33
GND
34
USIM_DATA
35
---
36
USIM_VDD
37
---
38
---
39
GND
40
I2C3_SCL
41
---
42
I2C3_SDA
43
---
44
I2C3_ALERT#
45
GND
46
---
47
---
48
---
49
---
50
---
51
GND
52
---
53
---
54
---
55
---
56
---
57
GND
58
---
