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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

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 158 159

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Iei-integration ICE-DB-9S Manual de usuario Pagina 36