MC68340FE16E Datasheet, PDF (339/441 Pages) Freescale Semiconductor, Inc – Integrated Processor with DMA User’s Manual

Freescale Semiconductor, Inc.
SIRQ
ABRKI
WAS
IRQx CAUSED
N
BY BEGINNING
OF A BREAK
?
Y
CLEAR CHANGE-IN-
BREAK STATUS BIT
ABRKI1
HAS
END-OF-BREAK
N
IRQx ARRIVED
YET
?
Y
CLEAR CHANGE-IN-
BREAK STATUS BIT
INCH
DOES
CHANNEL A
N
RECEIVER HAVE A
CHARACTER
?
Y
PLACE CHARACTER
IN D0
RETURN
REMOVE BREAK
CHARACTER FROM
RECEIVER FIFO
REPLACE RETURN
ADDRESS ON SYSTEM
STACK AND MONITOR
WARM START ADDRESS
SIRQR
RTE
Figure 7-10. Serial Module Programming Flowchart (4 of 5)
7-44
MC68340 USER’S MANUAL
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