Copyright © 2006 congatec AG
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Signal Descriptions and Pinout Tables
The following section describes the signals found on COM Express™ Type II connectors used for congatec AG modules.
The table below describes the terminology used in this section for the Signal Description tables. The PU/PD column indicates if a COM
Express™ internal pull-up or pull-down resistor has been used. If the field entry area in this column for the signal is empty, then no pull-up or
pull-down resistor has been implemented.
The “#” symbol at the end of the signal name indicates that the active or asserted state occurs when the signal is at a low voltage level. When
“#” is not present, the signal is asserted when at a high voltage level.
Table 2 Signal Tables Terminology Descriptions
Term
Description
PU
COM Express™ Internally implemented Pull up resistor
PD
COM Express™ implemented Pull down resistor
I/O 3.3V
Bi-directional signal 3.3V tolerant
I/O 5V
Bi-directional signal 5V tolerant
I 3.3V
Input 3.3V tolerant
I 5V
Input 5V tolerant
I/O 3.3VSB
Input 3.3V tolerant active in standby state
O 3.3V
Output 3.3V signal level
O 5V
Output 5V signal level
OD
Open drain output
P
Power Input/Output
DDC
Display Data Channel
PCIE
In compliance with PCI Express Base Specification, Revision 1.0a
SATA
In compliance with Serial ATA specification, Revision 1.0a
REF
Reference voltage output. May be sourced from a module power plane.
PDS
Pull-down strap. A module output pin that is either tied to GND or is not connected. Used to signal
module capabilities (pinout type) to the Carrier Board.
