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SP301

RS-232/RS-422 Line Drivers/Receivers

Signal Processing Technologies 

FIGURE 6: SP301 CONFIGURATIONS

One-Channel Full Duplex RS-232 &

One-Channel Full Duplex RS-422

Opposite Drivers

A single RS-232 line driver and receiver, and a

single RS-422 line driver and receiver. At first

glance, this is the same configuration as that in

Figure 5. Note however that functions are acti-

vated on the opposite channels as that of those in

Figure 1b.

Two-Channel Full Duplex RS-422

Two RS-422 line drivers and two RS-422

receivers.

TOA1

TIA

TOA2

ROA

RS-422 LINE DRIVER & RECEIVER

RS-232 LINE DRIVER & RECEIVER

RIA1

RIA2

TIB

TOB1

ROB

RIB1

SELECT A = 1

SELECT B = 0

LB = 1

TIA

TIB

RS-422 LINE DRIVERS

RS-422 RECEIVERS

ROA

ROB

TOA1

TOA2

TOB1

TOB2

RIA1

RIA2

RIB1

RIB2

SELECT A = 1

SELECT B = 1

LB = 1

60

Corporation

SIGNAL PROCESSING EXCELLENCE

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