IEI Integration ICE-DB-9S - Manual (Page 36)

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ICE Module
3.3 Signal Table Terminology
The following section describes the signals found on COM Express Type 2 connectors.
Most of the signals listed in the following sections also apply to other COM Express
module types. The pinout for connector rows A and B remains the same regardless of
the module type but the pinout for connector rows D and C are dependent on the
module type. Refer to the COM Express specification for information about the
different pin-outs of the module types other than Type 2.
Table 3-2 below describes the terminology used in this section for the Signal
Description tables. 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 3-2: Conventions and Terminology
Term Description
I/O Bi-directional signal
I Input signal
O Output signal
I/F Interface
GND Ground
PWR Power
OD
Open drain output
PD Pull down
PU Pull up
+V12 +12V ±5% Volts Normal Power
+V5SB +5V ±5% Standby Power
+3.3VSB +3.3V ±5% Standby Power
+V3.3 +3.3V ±5% Volts Normal Power
+V5 +5V ±5% Volts Normal Power
# Active-Low Signals
‘+’ and ‘-‘ Differential Pairs
PM Power Management
GBE Giga Bits Ethernet