Copyright
©
2015
congatec
AG
TCEDm11
39/96
8
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 6.0 Rev. 2.1.
Table 2 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 2
Signal Tables Terminology Descriptions
Term
Description
PU
congatec implemented pull-up resistor
PD
congatec 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
PEG
PCI Express Graphics
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.
