SSC P485 PL Transceiver IC

July 1998

4

Revision 5

24000828

ADVANCE INFORMATION

SSC P485 Application Examples

The SSC P485 may be used in a wide variety of applications. A typical node connecting to the medium is shown

in Figure 1. A gateway between an RS485 twisted pair network and a DC power line network is shown in Figure

2. A multi-point network application with gateways using the SSC P485 is illustrated in Figure 3. Figure 4

presents a host interface flow diagram showing the major steps necessary to transmit and receive messages

using the P485 IC.

Microprocessor

based Control

Logic

Single

Wire

ILD

WR

RD

SSC P485 PL

Transceiver

SSC P111

Power Line Media

Interface

SO

TS*

SI

DI

RO

input

filter

output

filter

medium

coupler

Figure 1. SSC P485 Typical Node

Microprocessor

based Control

Logic

UART

UART

+

-

D

DE

R

RE*

A

B

RS-485 Transceiver

Twisted

Pair

Single

Wire

Transmit Enable #1

RXD #1

RXD #1

TXD #1

ILD

RXD #2

TXD #2

RXRDY #2

TXRDY #2

DATA 0-7

RXRDY #1

TXRDY #1

TXD #1

RD #1

RD #2

WR #1

WR #2

SSC P485 PL

Transceiver

SSC P111

Power Line Media

Interface

SO

TS*

SI

ILD

DI

RO

input

filter

output

filter

medium

coupler

Figure 2. SSC P485 Gateway