ST16C454(1994) 查看數據表（PDF） - Exar Corporation

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ST16C454
(Rev.:1994)

QUAD UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART)

Exar Corporation 

Figure 3, Block Diagram 68 Mode

ST16C454/68C454

D0-D7

R/-W

-RESET

A0-A4

-CS

Transmit

Holding

Registers

Transmit

Shift

Register

TX A-D

Receive

Holding

Registers

Receive

Shift

Register

RX A-D

-IRQ

XTAL1

XTAL2

Modem

Control

Logic

-DTR A-D

-RTS A-D

-CTS A-D

-RI A-D

-CD A-D

-DSR A-D

Rev. 3.20

3

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