ST16C552A View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

ST16C552A

DUAL UART WITH 16-BYTE FIFO AND PARALLEL PRINTER PORT

Exar Corporation 

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ST16C552/552A

Figure 6, INTERNAL LOOP-BACK MODE DIAGRAM

D0-D7

-IOR

-IOW

-RESET

BIDEN

A0-A2

-CSA

-CSB

-CSP

Transmit

FIFO

Registers

Receive

FIFO

Registers

Transmit

Shift

Register

Receive

Shift

Register

Printer

Data

Ports

Printer

Control

Logic

INT A,B

INTP

-RXRDY

-TXRDY

Rev. 3.40

Clock

&

Baud Rate

Generator

14

TX A,B

RX A,B

PD0-PD7

-STROBE

INIT

-AUTOFDX

-SELCTIN

PE, SELECT

-BUSY, -ACK

ERROR

-RTS

-CD

-DTR

-RI

(-OP1)

-DSR

(-OP2)

-CTS

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