SBC-992-pITX
SBC-992-pITX User Manual - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G Copyright © 2016 SECO S.r.l.
36
3.3.10
miniPCI-express slot
To add communications functionality, or other features not
available on SBC-992-pITX board, it is possible to use Half-size
mini-PCI Express cards, using the dedicate connector, CN11,
which is a standard 52pin miniPCI Express connector, type
TYCO 1775861-1 or equivalent, H=4mm, with the pinout shown
in the table on the left.
Due to the reduced dimensions of the board itself, on the SBC-
992-pITX board it is only possible to insert Half-Size miniPCI
express cards.
On the slot are also available the signals for interfacing to SIM cards, so that it is possible to
use miniPCI Express modems.
PCI express Gen 2.0 is supported.
Signals carried to miniPCI-express slots are the following:
P/PCIE2_TX-: PCI Express lane #2, Transmitting Output Differential pair
P/PCIE2_RX-: PCI Express lane #2, Receiving Input Differential pair
PCIE / PCIE2_Clock-: PCI Express Reference Clock for lane #2, Differential Pair
PCIE_WAKE#: Board
’
s Wake Input, it must be externally driven by the miniPCI-e module
inserted in the slot when it requires waking up the system.
PCIE_RESET#: Reset Signal that is sent from G-Series SOC to all PCI-e devices available on
the board (i.e. the GbE controllers) and on the miniPCI-e module. It is a 3.3V active-low signal.
CLKREQ#: PCI Express Clock Request Input. This signal shall be driven correctly by any
module inserted in the miniPCI express slot, in order to ensure that G-Series SOC makes
available the reference clock.
SMB_CLK: SM Bus control clock line for System Management. Output signal, electrical level
+3.3V_S with a 2k2
Ω
pull-up resistor.
SMB_DATA: SM Bus control data line for System Management. Bidirectional signal, electrical
level +3.3V_S with a 2k2
Ω
pull-up resistor.
miniPCI-express Slot - CN11
Pin Signal
Pin Signal
1
PCIE_WAKE#
2
+3.3V_A
3
N.C.
4
GND
5
N.C.
6
+1.5V_S
7
CLKREQ#
8
UIM_PWR
9
GND
10
UIM_DATA
11
PCIE2_Clock-
12
UIM_CLK
13
PCIE
14
UIM_RST
15
GND
16
UIM_SPU
17
N.C.
18
GND
19
N.C.
20
W_DISABLE#
21
GND
22
PCIE_RESET#
23
PCIE2_RX-
24
+3.3V_A
25
P
26
GND
27
GND
28
+1.5V_S
29
GND
30
SMB_CLK
31
PCIE2_TX-
32
SMB_DATA
33
P
34
GND
35
GND
36
USB_P6-
37
GND
38
39
+3.3V_A
40
GND
41
+3.3V_A
42
N.C.
43
GND
44
N.C.
