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Chapter: Connectors PCI/104-Express Bus

page 22 Beckhoff New Automation Technology CB4052

3.6 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 1" connector which offers full PCI-Express x16. "Stacking Error" functionality is

available. For specifics, please refer to the PCI/104-Express™ documentation (rev. 2.0).

Description Name Pin Name Description

reserved N/C 1 2 PERST# PCIe reset

3.3 volt supply 3.3V 3 4 3.3V 3.3 volt supply

display data channel clock DDPC-CLK 5 6 N/C reserved

display data channel data DDPC-DAT 7 8 N/C reserved

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 PECLKx16 clock x16 slot +

SMBus clock SMBCLK 49 50 PECLKx16# clock x16 slot -

SMBus alert SMBALERT 51 52 PSON# PSU on

link reactivation PEWAKE# 53 54 PEGENA# PCIe graphics enable

ground GND 55 56 GND ground

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 72 73

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