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Chapter 2 – DFI CD102 Series User Manual

Page 27

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27

Chapter 2 Hardware Installation

Chapter 2

Parallel Port

The 25-pin connector is used to connect an external parallel port. The parallel port connects

your PC to a parallel printer. It supports SPP, ECP and EPP.

SPP

(Standard Parallel Port)

Allows normal speed operation but in one

direction only.

ECP

(Extended Capabilities Port)

Allows parallel port to operate in bidirectional

mode and at a speed faster than the SPP’s data

transfer rate.

EPP

(Enhanced Parallel Port)

Allows bidirectional parallel port operation at

maximum speed.

2

1

26

25

Parallel

The 1-channel I

2

C bus interface conforms to the version 2.1 I

2

C bus specification. It operates

as a master or slave device and supports a multi-master bus.

I

2

C Connector

1

2

5

6

GND

+3.3V_standby

SMBUS Data

SMBUS Clock

NC

SMBUS_Alert

I

2

C