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

ST16C454 EXTERNAL RESET CONDITIONS

REGISTERS RESET STATE

IER

ISR

LCR

MCR

LSR

MSR

IER BITS 0-7=0

ISR BIT-0=1, ISR BITS 1-7=0

LCR BITS 0-7=0

MCR BITS 0-7=0

LSR BITS 0-4=0,

LSR BITS 5-6=1 LSR, BIT 7=0

MSR BITS 0-3=0,

MSR BITS 4-7= input signals

SIGNALS

TX A-D

-RTS A-D

-DTR A-D

INT A-D

RESET STATE

High

High

High

Three-State

Rev. 3.20

19

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