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 

ST16C454/68C454

SYMBOL DESCRIPTION

Symbol

RX A-B

RX C-D

TX A-B

TX C-D

Pin

7,29

41,63

17,19

51,53

Signal

type

Pin Description

will be set to a logic 1. This pin has no effect on the UART’s transmit

or receive operation.

I

Receive Data Input RX A-D. - These inputs are associated with

individual serial channel data to the ST16C454. The RX signal will

be a logic 1 during reset, idle (no data), or when the transmitter is

disabled. During the local loop-back mode, the RX input pin is

disabled and TX data is internally connected to the UART RX Input,

internally.

O

Transmit Data - These outputs are associated with individual serial

transmit channel data from the 454. The TX signal will be a logic

1 during reset, idle (no data), or when the transmitter is disabled.

During the local loop-back mode, the TX input pin is disabled and

TX data is internally connected to the UART RX Input.

Rev. 3.20

8

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