5 pci/104-express bus – BECKHOFF CB4058 User Manual
Page 20
Chapter: Connectors
PCI/104-Express Bus
page 20
Beckhoff New Automation Technology CB4058
3.5 PCI/104-Express Bus
Expansion modules for the PCI-Express bus can be connected to the board using the PCI/104-Express™
connector. This is a "type 2" connector with only those signals connected that are supported by the
chipset. "Stacking Error" functionality is available. For specifics, please refer to the PCI/104-Express™
documentation (rev. 2.0).
Pinout PCI104-Express connector (type 2):
Description
Name
Pin
Name
Description
USB overcurrent
USBOC#
1
2
PERST#
PCIe reset
3.3 volt supply
3.3V
3
4
3.3V
3.3 volt supply
USB11 +
USB11
5
6
USB10
USB10 +
USB11 -
USB11#
7
8
USB10#
USB10 -
ground
GND
9
10
GND
ground
transmit lane 2 +
PET2
11
12
PET1
transmit Lane 1 +
transmit lane 2 -
PET2#
13
14
PET1#
transmit lane 1 -
ground
GND
15
16
GND
ground
transmit lane 3 +
PET3
17
18
PET4
transmit lane 4 +
transmit lane 3 -
PET3#
19
20
PET4#
transmit lane 4 -
ground
GND
21
22
GND
ground
receive lane 2 +
PER2
23
24
PER1
receive lane 1 +
receive lane 2 -
PER2#
25
26
PER1#
receive lane 1 -
ground
GND
27
28
GND
ground
receive lane 3 +
PER3
29
30
PER4
receive lane 4 +
receive lane 3 -
PER3#
31
32
PER4#
receive lane 4 -
ground
GND
33
34
GND
ground
clock slot 1 +
PECLK1
35
36
PECLK0
clock slot 0 +
clock slot 1 -
PECLK1#
37
38
PECLK0#
clock slot 0 -
5 volt standby supply
SVCC
39
40
SVCC
5 volt standby supply
clock slot 2 +
PECLK2
41
42
PECLK3
clock slot 3 +
clock slot 2 -
PECLK2#
43
44
PECLK3#
clock slot 3 -
CPU direction
CPU_DIR
45
46
PWRGOOD powergood
SMBus data
SMBDAT
47
48
N/C
reserved
SMBus clock
SMBCLK
49
50
N/C
reserved
SMBus alert
SMBALERT 51
52
PSON#
power supply on
link reactivation
PEWAKE#
53
54
ST1-ERR#
stacking error 1