Motorola MC68340 ユーザーズマニュアル

7- 44

MOTOROLA

WAS

IRQx CAUSED

BY BEGINNING

OF A BREAK

?

CLEAR CHANGE-IN-

BREAK STATUS BIT

HAS

END-OF-BREAK

IRQx ARRIVED 

YET

?

CLEAR CHANGE-IN- 

BREAK STATUS BIT

REMOVE BREAK

CHARACTER FROM

RECEIVER FIFO

REPLACE RETURN

ADDRESS ON SYSTEM

STACK AND MONITOR

WARM START ADDRESS

RTE

SIRQR

N

Y

N

DOES

CHANNEL A

RECEIVER HAVE A 

CHARACTER

?

PLACE CHARACTER

IN D0

N

Y

ABRKI1

ABRKI

Y

INCH

RETURN

 SIRQ

F

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sc

a

le

 S

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r,

 I

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

 

Freescale Semiconductor, Inc.

For More Information On This Product,

   Go to: www.freescale.com

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