Adlink Express-CVC Uživatelský manuál stáhnout pdf (Strana 16)

Page 16 Express-CVC

3.2. Signal Description Terminology

The following terms are used in the COM Express AB/CD Signal Descriptions below.

I Input to the Module

O Output from the Module

I/O Bi-directional input / output signal

OD Open drain output

I 3.3V Input 3.3V tolerant

I 5V Input 5V tolerant

O 3.3V Output 3.3V signal level

O 5V Output 5V signal level

I/O 3.3V Bi-directional signal 3.3V tolerant

I/O 5V Bi-directional signal 5V tolerant

I/O 3.3Vsb Input 3.3V tolerant active in standby state

P Power Input/Output

REF Reference voltage output that may be sourced from a module power plane.

PDS Pull-down strap. This is an output pin on the module that is either tied to GND or not connected.

The signal is used to indicate the PICMG module type to the Carrier Board.

PU ADLINK implemented pull-up resistor on module

PD ADLINK implemented pull-down resistor on module

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Adlink Express-CVC Uživatelský manuál Strana 16