SBC-C57
SBC-C57 User Manual - Rev. First Edition: 1.0 - Author: S.O. - Reviewed by R.Z. - Copyright © 2021 SECO S.p.A.
32
3.3.11
Mini PCI-e Slot
To add communication functionality, or other features not
already available, it is possible to mount a Full-size mini-PCI
Express card on connector CN20. This is a standard 52pin
miniPCI Express connector with x1 PCIe and a USB 2.0
interface, type LOTES p/n AAA-PCI-047-K01 or equivalent,
H=4.0mm, with the pinout shown on the table to the left.
Signals carried to miniPCI-express slot are the following:
PCIE_WAKE#
electrical level
-up resistor it must be externally
driven by the module inserted in the slot when it requires waking up the system.
PCIE_CONN_CTRL_CLKREQ#: PCI-e Clock Request Input. Active low signal, electrical level
+3.3V_RUN
-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.
PCIE_RST#: Reset Signal that is sent from the SoC to the inserted module. It is a +3.3V_RUN
active-low signal with 5
-down.
P / PCIE_CLK-: PCI Express Reference Clock
P / PCIE0_TX-: PCI Express lane #0, Transmitting Output Differential pair
P / PCIE0_RX-: PCI Express lane #0, Receiving Input Differential pair
SMB_CLK:
-up resistor.
SMB_DAT:
-
up resistor.
USB_PCIE- / : USB Hub Downstream Port #1, differential pair
miniPCI-e Slot CN20
Pin Signal
Pin Signal
1
PCIE_WAKE#
2
+3V3_RUN
3
---
4
GND
5
---
6
+1V5_RUN
7
PCIE_CONN_CTRL_CLKREQ#
8
---
9
GND
10
---
11
PCIE_CLK-
12
---
13
P
14
---
15
GND
16
---
17
---
18
GND
19
---
20
---
21
GND
22
PCIE_RST#
23
PCIE0_RX-
24
+3V3_ALW
25
P
26
GND
27
GND
28
+1V5_RUN
29
GND
30
SMB_CLK
31
PCIE0_TX-
32
SMB_DAT
33
P
34
GND
35
GND
36
USB_PCIE-
37
GND
38
U
39
+3.3V_RUN
40
GND
41
+3.3V_RUN
42
---
43
---
44
---
45
---
46
---
47
---
48
+1V5_RUN
49
---
50
GND
51
---
52
+3V3_RUN