CX28395-19 데이터 시트보기 (PDF) - Conexant Systems

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CX28395-19

Quad/x16/Octal—T1/E1/J1 Framers

Conexant Systems 

1.0 Product Description

1.1 Overview

CX28394/28395/28398

Quad/x16/Octal—T1/E1/J1 Framers

1.1.3 LIU Serial Port

The CX28394 and CX28398 devices include a serial interface which allows a

microprocessor to indirectly communicate with a line interface unit such as the

CX28380 Quad T1/E1 LIU. This interface allows the microprocessor to control

and query the LIU status. This serial interface is not available on the CX28395.

1.1.4 Transmit/Receive Line Interface

The CX28394 and CX28398 devices include line interfaces which can operate in

either of two modes: bipolar NRZ or unipolar NRZ. In bipolar NRZ mode,

receiver signals RPOSI, RNEGI, and RCKI are used; and transmitter signals

TPOSO, TNEGO, and TCKO are used. In unipolar NRZ mode, receiver signals

RNRZ and RCKI are used, and transmitter signals TNRZO and TCKO are used.

The CX28395 device provides only unipolar NRZ operation and signals.

Figure 1-1 illustrates the CX28395 Functional Block Diagram (single framer).

Figure 1-1. CX28395 Functional Block Diagram

Receive NRZ Data

Receive NRZ Clock

Transmit NRZ Data

Transmit NRZ Clock

T1/E1

Receive

Framer

RX

Slip

Buffer

TX

Slip

Buffer

Overhead

Insertion

T1/E1

Transmit

Framer

Data Link Controllers

DL1 + DL2

Receive

System

Bus

Transmit

System

Bus

1-2

Conexant

100054E

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