Congatec Com Express conga-TC570 - Signal Descriptions and Pinout Tables; Table 12 Signal Tables Terminology Descriptions

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8 Signal Descriptions and Pinout Tables

The following section describes the signals found on COM Express™ Type 6 connectors used for congatec GmbH modules. The pinout of the

modules complies with COM Express Type 6, rev. 3.0.

The table below describes the terminology used in this section. The PU/PD column indicates if a 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 12 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 or output 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 PCI Express compatible differential signal. In compliance with PCI Express Speciﬁcation.

PEG PCI Express Graphics

SATA In compliance with Serial ATA speciﬁcation Revision 2.6 and 3.0.

LVDS Low Voltage Differential Signal - 330 mV nominal; 450 mV maximum differential signal

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.