Adlink Express-IBE2 Manual de usuario descargar pdf (Pagina 17)

Express-IBE2 Page 17

3.2. Signal Description Terminology

These terms are used in the COM Express AB/CD Signal Descriptions which follow.

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-IBE2 Manual de usuario Pagina 17