Connectors
28/48
6.4
PCI Express M.2 bus
The following table applies for pin assignment on the PCI Express M.2 bus
of the PC card CIFX M223090AE (basic card).
Pin
Name
Description
Type
1
GND
Return current path.
Power
2
3.3V
3.3V supply
Power
3
NC
(not used)
-
4
3.3V
3.3V supply
Power
5
NC
(not used)
-
6
BOOT#
Reserved (vendor defined pin for production purposes only).
Input
7
GND
Return current path.
Power
8-15
-
KEY A
-
16
NC
(not used)
-
17
NC
(not used)
-
18
GND
Return current path.
Power
19-23 NC
(not used)
-
24-31 -
KEY E
-
32
NC
(not used)
-
33
GND
Return current path.
Power
34
NC
(not used)
-
35
PERp0
PCIe TX/RX Differential signals defined by the PCI Express CEM Specification.
Input
36
NC
(not used)
-
37
PERn0
PCIe TX/RX Differential signals defined by the PCI Express CEM Specification.
Input
38
NC
(not used)
-
39
GND
Return current path.
Power
40
SYNC1
synchronisation pin for realtime systems
Output
41
PETp0
PCIe TX/RX Differential signals defined by the PCI Express CEM Specification.
Output
42
SYNC0
syncronisation pin for realtime systems
Output
43
PETn0
PCIe TX/RX Differential signals defined by the PCI Express CEM Specification.
Output
44
NC
(not used)
-
45
GND
Return current path.
Power
46
NC
(not used)
-
47
REFCLKP PCIe Reference Clock signals (100 MHz) defined by the PCI Express CEM Specification.
Input
48
NC
(not used)
-
49
REFCLKN PCIe Reference Clock signals (100 MHz) defined by the PCI Express CEM Specification.
Input
50
NC
(not used)
-
51
GND
Return current path.
Power
52
PERST#
PCIe Reset is a functional reset to the card as defined by the PCI Express Mini CEM
Specification.
Input
53
CLKREQ# PCIe Clock Request is a reference clock request signal as defined by the PCI Express
Mini CEM Specification. This signal is also used by L1PM Substates. Open Drain with pull
up on Platform. Active Low.
I/O
54
NC
(not used)
-
55
PEWAKE
#
PCIe WAKE#. Open Drain with pull up on Platform. Active Low when used as PEWAKE#.
When the Adapter supports wakeup, this signal is used to request that the system return
from a sleep/suspend state to service a function-initiated wake event. When the Adapter
supports OBFF mechanism, the PEWAKE#signal is used for OBFF signaling.
I/O
56
NC
(not used)
-
57
GND
Return current path.
Power
58-63 NC
(not used)
-
63
GND
Return current path.
Power
CIFX M223090AE-CO\F | Hardware description and installation
DOC210203UM02EN | Revision 2 | English | 2021-09 | Released | Public
© Hilscher 2021
