QPC841 Quad Serial Data Interface card Page 861 of 894

Figure 185

QPC841 QSDI card block diagram

RS-232-C

UARTs

UART

no. 1

UART

no. 2

UART

no. 3

UART

no. 4

Address

decode logic

Processor

bus

drivers and receivers

TD

Port 1

J1

RD

TD

Port 2

RD

TD

Port 3

J2

 

RD

TD

RD Port 4

Clock and bit rate select logic

553-5986

Circuit Card Description and Installation

Page 861
Image 861
Nortel Networks 553-3001-211 manual QPC841 Qsdi card block diagram