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.
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3.3.7
M.2 Connectivity Slot: Key E Socket 1
It is possible to increase the connectivity of the SBC-C23
board by using M.2 Socket 1 Key E connectivity slot.
The connector used for the M.2 Connectivity slot is CN28,
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 the SBC-C23 board there is also a threaded Spacer which
allows the placement of M.2 Socket 1 Key E connectivity modules in 2230 size.
Here following the signals related to this connectivity interface:
/USB_DS3-: USB Hub Downstream Port #3 differential pair.
/PCIe_TX-: PCI Express port #4, Transmitting Output Differential pair
/PCIe_RX-: PCI Express port #4, Receiving Input Differential pair
P / PCIe_CLK-: PCI Express Reference Clock, Differential Pair
PCIe_WAKE#: Board
’
s Wake Input, NVCC_3V0 electrical level with a 10k
Ω
pull-up resistor. It
must be externally driven by the Connectivity module inserted in the slot when it requires waking
up the system.
PCIe_RST: Reset Signal that is sent from the processor to the PCI-e devices available on the
connectivity module. It is a NVCC_3V0 electrical level active-high signal.
PCIe_REQ#: PCI Express Clock Request Input, active low signal, NVCC_3V0 electrical level
with a 10k
Ω
pull-up resistor. This signal shall be driven low by any module inserted in the
connectivity slot, in order to ensure that the SoC makes available the reference clock.
W_DISABLE1#: Wireless module functionality disable signal #1, active low signal, NVCC_3V0
electrical level with a 10k
Ω
pull-up resistor.
W_DISABLE2#; Wireless module functionality disable signal #1, active low signal, NVCC_3V0
electrical level with a 10k
Ω
pull-up resistor.
SUS_CLK: 32.768kHz Clock provided by the SBC-C23 board to the module plugged in the
slot CN28. NVCC_3V0 electrical level.
M.2 Connectivity Slot: Socket 1 Key E type 2230 CN28
Pin Signal
Pin Signal
1
GND
2
+3.3V_ALW
3
4
+3.3V_ALW
5
USB_DS3-
6
LED#
7
GND
8
---
9
---
10
---
11
---
12
---
13
---
14
---
15
---
16
---
17
---
18
GND
19
---
20
---
21
---
22
---
23
---
32
---
33
GND
34
---
35
36
---
37
PCIe_Tx-
38
SPI_CLK
39
GND
40
SPI_MOSI
41
42
SPI_MISO
43
PCIe_Rx-
44
---
45
GND
46
---
47
P
48
---
49
PCIe_CLK-
50
SUS_CLK
51
GND
52
PCIe_RST
53
PCIe_REQ#
54
W_DISABLE2#
55
PCIe_WAKE#
56
W_DISABLE1#
57
GND
58
I2C3_SDA
