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9
Signal Descriptions and Pinout Tables
The following section describes the signals found on COM Express™ Type VI connectors used for congatec AG modules. The pinout of the
modules complies with COM Express Type 6 Rev. 2.1.
Table 3 describes the terminology used in this section for the Signal Description tables. The PU/PD column indicates if a COM Express™
module 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 by congatec.
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.
Note
The Signal Description tables do not list internal pull-ups or pull-downs implemented by the chip vendors, only pull-ups or pull-downs
implemented by congatec are listed. For information about the internal pull-ups or pull-downs implemented by the chip vendors, refer to
the respective chip’s datasheet.
Table 9 Signal Tables Terminology Descriptions
Term
Description
PU
congatec implemented pull-up resistor
PD
congatec implemented pull-down resistor
I
Input to the module
O
Output from the module
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 2.0
PEG
PCI Express Graphics
SATA
In compliance with Serial ATA specification Revision 2.6 and 3.0.
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.
