SBC-D23
SBC-D23 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by P.Z. - Copyright © 2021 SECO S.p.A.
28
3.3.3
miniPCI-e WWAN Slot
To add communications functionality, or other features not already
available, it is possible to use Half-/ Full-size mini-PCI Express
cards, using the dedicate connector, CN17, which is a standard
52pin miniPCI Express connector, type LOTES AAA-PCI-047-K01
or equivalent, H=9.0mm, with the pinout shown in the table on the
left.
SBC-D23 board allows inserting only modules in Half-mini form
factor.
On the slot are also available the signals for interfacing to microSIM cards, so that it is possible
to use miniPCI Express card modems requiring USB Only interface (PCI-e interface is not
available on this slot).
Signals carried to miniPCI-express slot are the following:
mPCIE_WAKE#: Board
’
s Wake Input, it must be externally driven by the module inserted in the
slot when it requires waking up the system.
mPCIE_W_DISABLE#: Wireless Disable signal, managed on the SBC-D23 board by one GPIO
of the on-board I/O Expanders. Electrical level +3P3V_SW.
mPCIE_RST#: Reset Signal, managed on the SBC-D23 board by one GPIO of the on-board
I/O Expanders. Electrical level +3P3V_SW.
US/USBHUB_P1-: USB Hub Downstream Port #1, differential pair
UIM_RST#: Reset signal line, sent from the modem module to the microSIM card.
UIM_DATA: Bidirectional Data line between the modem module and the microSIM card.
UIM_CLK: Clock line, output from the modem module to the microSIM card.
UIM_PWR: Power line for the microSIM card. Can be 1.8V or 3.3V, it is supported by the EG25-
G module automatically.
Please be aware that all signals related to User Identity Modules are managed directly by the
miniPCI-express card circuitry, they don
’
t involve SBC-D23 board
’
s management. The
SBC_D23 board embeds only clamping diodes for ESD protection on UIM signal and voltage
lines.
Three SMT RED LEDs are present near this Mini PCI-Express Card Slot to show the presence
miniPCI-e Slot - CN17
Pin Signal
Pin Signal
1
mPCIE_WAKE#
2
+3V3_MOD
3
---
4
GND
5
---
6
+1.5V_PCIE
7
---
8
UIM_PWR
9
GND
10
UIM_DATA
11
---
12
UIM_CLK
13
---
14
UIM_RESET
15
GND
16
---
17
---
18
GND
19
---
20
mPCIE_W_DISABLE#
21
GND
22
mPCIE_RST#
23
---
24
+3V3_MOD
25
GND
26
GND
27
GND
28
+1P5V_PCIE
29
---
30
---
31
---
32
---
33
---
34
GND
35
GND
36
USBHUB_P1-
37
GND
38
US
39
+3V3_MOD
40
GND
41
+3V3_MOD
42
LED_WPAN#
43
GND
44
LED_WLAN#
45
---
46
LED_WWAN#
47
---
48
+1.5V_S
49
---
50
GND
51
---
52
+3.3V_A
