ST16C552IJ68 查看數據表（PDF） - Exar Corporation

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ST16C552IJ68

DUAL UART WITH 16-BYTE FIFO AND PARALLEL PRINTER PORT

Exar Corporation 

ST16C552/552A

Figure 1, Block Diagram

D0-D7

-IOR

-IOW

-RESET

BIDEN

A0-A2

-CSA

-CSB

-CSP

INT A,B

INTP

-RXRDY

-TXRDY

Transmit

FIFO

Registers

Receive

FIFO

Registers

Clock

&

Baud Rate

Generator

Transmit

Shift

Register

Receive

Shift

Register

Printer

Data

Ports

Printer

Control

Logic

Modem

Control

Logic

TX A,B

RX A,B

PD0-PD7

-STROBE

INIT

-AUTOFDX

-SELCTIN

PE, SELECT

-BUSY, -ACK

ERROR

-DTR A,B

-RTS A,B

-CTS A,B

-RI A,B

-CD A,B

-DSR A,B

Rev. 3.40

2

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